Battery and Cell Materials Field
Tetsuro Morooka, Tamao Shishido, Takuya Nakanishi, Takuya Masuda, ELECTROCHEMISTRY COMMUNICATIONS 180, 108050-1-108050-6 (2025). "Modification of platinum surfaces with cerium species for promoting oxidative desorption of adsorbed sulfur"
DOI:10.1016/j.elecom.2025.108050
AI-Generated Summary:In this study, we investigated the effect of cerium (Ce) modification on the platinum (Pt) surface as a mitigation technique for sulfur (S) poisoning in polymer electrolyte fuel cells (PEFCs). The results suggest that Ce modification of the Pt surface could be a practical mitigation strategy against S poisoning.
Xiaozhou Huang, Matthew Li, Yanan Gao, Moon Gyu Park, Shoichi Matsuda, Khalil Amine, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 64, e202507967-1-e202507967 (2025). "Discharge Rate-Driven Li2O2 Growth Exhibits Unconventional Morphology Trends in Solid-State Li-O2 Batteries"
DOI:10.1002/anie.202507967
AI-Generated Summary:In this study, we investigated the effects of discharge rate on the formation of lithium peroxide (Li₂O₂), the oxygen evolution reaction (OER), and the cycling performance using polymer-based LOBs. The results provide new mechanistic insights into the discharge process in LOBs and offer practical guidance for optimizing the performance of future high-energy battery systems.
Dhruba B. Khadka, Masatoshi Yanagida, Roji Sahara, Yasuhiro Shirai, Conference Record of the IEEE Photovoltaic Specialists Conference 1, 0680-0682 (2025). "Surface Passivation of Sn-Based Wide Band Gap Perovskite Solar Cells Using Functional Molecules"
DOI:10.1109/PVSC59419.2025.11133091
AI-Generated Summary:In this study, we developed a surface passivation method using multifunctional molecules to improve the performance and stability of wide-bandgap tin-based perovskite solar cells (WB-Sn-PSCs). We fabricated WB-Sn-PSCs with a bandgap of 1.68 eV and achieved a power conversion efficiency of 11.14%. This work demonstrates the potential of advanced chemical engineering strategies in optimizing non-toxic and lead-free perovskite solar cells, contributing to the enhanced competitiveness of environmentally friendly photovoltaic technologies.
Dhruba B. Khadka, Masatoshi Yanagida, Yasuhiro Shirai, Conference Record of the IEEE Photovoltaic Specialists Conference 1, 0730-0732 (2025). "Investigation of Degradation in Perovskite Solar Cells Using Thermal Hysteresis of Photocurrent"
DOI:10.1109/PVSC59419.2025.11132630
AI-Generated Summary:In this study, we investigated the degradation process of PSCs by analyzing the thermal hysteresis of photocurrent (THPC) and the thermally activated ion dynamics. This study revealed a direct correlation between the degradation of PSC devices and the presence of thermally activated charges.
Tewelde Hailay Gebregeorgis, Naoaki Kuwata, Mats Meeusen, Xinhua Zhu, Annick Hubin, Mesfin Haile Mamme, ELECTROCHIMICA ACTA 541, 147121-1-147121-17 (2025). "A Coupled Electro-Chemo-Mechanical Model for All-Solid-State Batteries and Its Impact on Performance Prediction"
DOI:10.1016/j.electacta.2025.147121
AI-Generated Summary:In this study, we developed an experimentally validated, fully coupled electro-chemo-mechanical model that incorporates both dynamic lithium-ion kinetics and dynamic mechanical parameters. This facilitates a detailed understanding and quantification of the multifaceted relationship between material properties and performance in ASSLIB. Our findings underscore the importance of adopting fully coupled modeling with dynamic parameters to build reliable predictive tools that accurately reflect the real-world behavior of ASSLIB. Such models are essential for guiding the design, optimization, and advancement of next-generation ASSLIB technologies.
Nasrat Hannah Shudin, Ryuto Eguchi, Shigenori Ueda, Ankit Singh, Ayako Hashimoto, Hideki Abe, Journal of Materials Chemistry A 13, 9660-9664 (2025). "A heteroepitaxial interface of Pt//CeO2 nanoparticles for enhanced catalysis of the oxygen reduction reaction (ORR)"
DOI:10.1039/D4TA07380K
AI-Generated Summary:In this study, we synthesized a MON material, Pt//CeO₂, composed of platinum (Pt) and cerium dioxide (CeO₂), and demonstrated that its heteroepitaxial interface enhances catalytic performance. Pt//CeO₂ with this interface exhibited superior catalytic activity in the oxygen reduction reaction (ORR) in alkaline media compared to conventional Pt catalysts and large-particle-size Pt//CeO₂ bulk catalysts.
Shoichi Matsuda, Misato Takahashi, Batteries & Supercaps 8, e202400777-1-e202400777-7 (2025). "Multichannel Electrochemical Cell and Liquid-Handling Dispenser for High-Throughput Combinatorial Screening of Multicomponent Electrolytes for Advanced Lithium-Ion Batteries"
DOI:10.1002/batt.202400777
AI-Generated Summary:In this study, we developed a high-throughput experimental setup consisting of a closed-type multi-channel electrochemical cell module, a non-contact liquid handling dispenser, and a multi-electrochemical analyzer within a temperature-controlled chamber. This system enables the preparation of multi-component electrolyte additives by combinatorial methods and the evaluation of battery performance over a wide temperature range, achieving a throughput of over 400 samples per week. This overcomes the limitations of high-throughput experiments, which have traditionally been confined to room temperature, and accelerates the optimization of electrolyte composition.
Qianli Si, Shoichi Matsuda, Yasunobu Ando, Toshiyuki Momma, Yoshitaka Tateyama, Advanced Science 12, 2502336-1-2502336-11 (2025). "Capacity Estimation and Knee Point Prediction Using Electrochemical Impedance Spectroscopy for Lithium Metal Battery Degradation via Machine Learning"
DOI:10.1002/advs.202502336
AI-Generated Summary:In this study, we propose a machine learning (ML) framework that combines electrochemical impedance spectroscopy (EIS) and the XGBoost algorithm, developing two models: one for capacity fade estimation and another for detecting the knee point (KP), which is the inflection point of the degradation trajectory. This research suggests the potential of EIS-based ML models to accurately predict the health status of LMBs, deepen our understanding of the degradation process, and enhance battery management strategies.
Morihiro Maruno, Futa Nakayama, Yasuhiro Suzuki, Miyuki Sakakura, Tsuyoshi Ohnishi, Yuki Nomura, Koji Hiraoka, Kazuo Yamamoto, Takeshi Yajima, Yasutoshi Iriyama, Communications Materials 6, 144-1-144-10 (2025). "Chemical design rules for low-resistivity electrode–electrolyte interfaces in all-solid-state lithium batteries"
DOI:10.1038/s43246-025-00870-8
AI-Generated Summary:In this study, lithium phosphate, a typical Li⁺ conductive amorphous solid electrolyte whose Li chemical potential changes with the Li/P atomic ratio, was combined with c-axis-orientedLiCoO₂ thin films. Within a specific Li/P atomic ratio range, a minimum interfacial resistance of less than 10 Ω cm² was achieved. This study demonstrated that controlling the Li/P atomic ratio and optimizing the charge/discharge state of the electrode are key factors in suppressing side reactions and forming low-resistance interfaces during interface formation using lithium phosphate solid electrolyte and LiCoO₂ electrodes. This provides guidelines for further improving the performance of all-solid-state secondary lithium batteries.
Daisuke Ito, Naoaki Kuwata, Seiji Takemoto, Kazuhiro Kamiguchi, Gen Hasegawa, Kazunori Takada, Nature Communications 16, 7372-1-7372-12 (2025). "Lattice-matched antiperovskite-perovskite system toward all-solid-state batteries"
DOI:10.1038/s41467-025-62860-1
AI-Generated Summary:In this study, we developed a system combining anti-perovskite and perovskite as a composite solid electrolyte with high lattice matching. This research suggests a promising composite solid electrolyte material and its fabrication and application methods for the realization of safe and long-life all-solid-state batteries.
Emily C. Hayward, Masaki Takeguchi, Harry J. Lloyd, Joshua M. Stratford, Andrew J. Smith, Tim Snow, Joaquin Ramírez-Rico, Zoe Schnepp, JOURNAL OF MATERIALS CHEMISTRY A 13, 26327-26336 (2025). "In situ TEM and synchrotron SAXS/WAXS study on the impact of different iron salts on iron-catalysed graphitization of cellulose"
DOI:10.1039/d5ta03584h
AI-Generated Summary:This study elucidates the mechanism of graphitization of biomass-derived iron catalysts in the production of carbon materials essential for sustainable energy applications. Specifically, we focused on the influence of iron salt types on the properties of carbon materials and investigated in detail the graphitization process of cellulose using iron(III) nitrate (Fe(NO₃)₃) and iron(III) chloride (FeCl₃). The results suggest that the type of iron salt significantly affects the chemical and structural properties of biomass-derived carbon materials, with FeCl₃ particularly promoting efficient graphitization. This has the potential to contribute to the sustainable production of carbon materials with controlled properties for energy applications.
Masaki Takeguchi, Jonathan Lueke, Matthew Reynolds, Baibing Zhao, Ayako Hashimoto, MICRON 198, 103888-1-103888-7 (2025). "Liquid-cell annular dark-field scanning transmission electron microscopy imaging of single crystal samples on a low-index zone-axis incidence condition"
DOI:10.1016/j.micron.2025.103888
AI-Generated Summary:In this study, we developed a biaxial tilting liquid cell (LC) holder for annular dark-field scanning transmission electron microscopy (ADF-STEM) to overcome the spatial resolution limit. This holder enables atomic resolution imaging of single crystal samples. This high-contrast imaging technique is expected to mitigate electron beam-induced radiolysis and minimize sample damage, especially during high-magnification imaging, due to the reduced probe current.
Atsushi Tamura, Toshihiko Mandai, Shunsuke Yagi, MATERIALS TODAY COMMUNICATIONS 48, 113325-1-113325-9 (2025). "Modeling for homogeneous Mg electrodeposition on Mg metal negative electrode in rechargeable Mg batteries"
DOI:10.1016/j.mtcomm.2025.113325
AI-Generated Summary:In this study, we analyzed in detail the deposition behavior of Mg on heterogeneous Mg metal surfaces formed during charging and discharging cycles through simulations using the Newman model and experimental verification. The findings from this research will contribute to strategies for achieving uniform Mg electrodeposition and to optimal electrolyte design.
Miyuki Shinoda, Koki Matsunoshita, Masanobu Nakayama, Satoshi Hiroi, Koji Ohara, Masaki Abe, Nozomu Ishiguro, Yukio Takahashi, Gen Hasegawa, Naoaki Kuwata, Tsukasa Iwama, Takuya Masuda, Kosuke Suzuki, Hirofumi Ishii, Yu-Cheng Shao, Daisuke Shibata, Akinori Irizawa, Toshiaki Ohta, Itsuki Konuma, Teppei Ohno, Yosuke Ugata, Naoaki Yabuuchi, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 147, 26238-26253 (2025). "Activation of Anionic Redox for Stoichiometric and Li-Excess Metal Sulfides through Structural Disordering: Joint Experimental and Theoretical Study"
DOI:10.1021/jacs.5c04018
AI-Generated Summary:In this study, we conducted experimental and theoretical collaborative research focusing on materials with different crystal structures, namely cation-disordered rocksalt structures and cation-ordered layered structures, for both Li-excess and stoichiometric compounds. The findings from this study will provide guidelines for the development of high-energy-density electrode materials utilizing anion redox, including transition metal ions with or without conductive d-electrons. In particular, it was suggested that the formation of cation-disordered structures and the accompanying emergence of SLi6 local structures are key to activating anion redox in sulfide compounds.
Man Wang, Rui Sun, Huajian Chen, Toru Yoshitomi, Hiroaki Mamiya, Masaki Takeguchi, Naoki Kawazoe, Yingnan Yange, Guoping Chen, MATERIALS HORIZONS 12, 4363-4378 (2025). "Differential intracellular influence of cancer cells and normal cells on magnetothermal properties and magnetic hyperthermal effects of magnetic nanoparticles"
DOI:10.1039/D5MH00317B
AI-Generated Summary:In this study, we discovered that the intracellular microenvironment of cancer cells and normal cells has different effects on the thermomagnetic properties and magnetic hyperthermia effect of MNPs. Furthermore, we verified that the low viscoelasticity of cancer cells leads to a discriminating effect in the magnetic hyperthermia effect of MNPs through cell softening/hardening experiments and simulation models using viscous liquids and elastic hydrogels. These findings suggest that the intracellular microenvironment is an important factor to consider for the magnetic hyperthermia effect of MNPs, alongside MNP accumulation and heat dissipation within tumors.
Fumihiko Ichihara, Shogo Miyoshi, Machiko Ode, Takuya Masuda, JOURNAL OF PHYSICAL CHEMISTRY C 129, 12738-12749 (2025). "Co-sintering Reaction Analysis of LiCoO2 Cathodes and NASICON-Type LATP Solid Electrolytes Studied by Experimental and Computational Methods"
DOI:10.1021/acs.jpcc.5c02329
AI-Generated Summary:In this study, we analyzed the reaction products formed when LiCoO₂（LCO）, a common cathode material for lithium-ion batteries, and Li₁.₃Al₀.₃Ti₁.₇(PO₄)₃（LATP）, an oxide-based solid electrolyte, were mixed in various ratios and co-sintered at different temperatures, using X-ray diffraction (XRD) and X-ray absorption near edge structure (XANES). As a result, we elucidated the formation mechanism of reaction products in the co-sintering of LCO and LATP from both experimental and thermodynamic perspectives. In particular, it was shown that the sintering temperature, mixing ratio, and kinetic factors significantly influence the type of products formed.
Muhammad Waqas, Dhruba B. Khadka, Abdul Haseeb Hassan Khana, Ying-Chiao Wang, NANOSCALE 17, 15648-15675 (2025). "Fullerene-driven photocarrier processes in perovskite solar cells: recent advances"
DOI:10.1039/D5NR01894C
AI-Generated Summary:This study summarizes recent advances in the photocarrier dynamics of fullerenes in perovskite solar cells (PSCs). Fullerenes play an indispensable role in promoting charge transport, suppressing recombination losses, and enhancing device stability, with a particular focus on their impact at the photocarrier level. Functionalized fullerene derivatives are designed to optimize energy level alignment, reduce interfacial losses, and improve photovoltaic performance. These advancements contribute to the development of efficient and stable PSCs, driving progress in next-generation solar energy technologies.
Nataly Carolina Rosero-Navarro, Haruna Watanabe, Randy Jalem, Maycol Mena, Xinhao Yang, Shota Sugio, Hiroaki Ito, Yoshitaka Tateyama, Akira Miura, Kiyoharu Tadanaga , ELECTROCHIMICA ACTA 528, 146233-1-146233-8 (2025). "Microstructure-controlled Li ion conductive oxide–based ceramic solid electrolytes supporting high current densities"
DOI:10.1016/j.electacta.2025.146233
AI-Generated Summary:In this study, we aimed to improve the performance of all-solid-state batteries by suppressing lithium dendrite formation at high current densities using glassy lithium borate (LBO) as a grain boundary modifier in garnet-type solid electrolytes. This research proposes a promising methodology for simultaneously achieving high current density operation and improved interfacial stability in garnet-based all-solid-state batteries, holding the potential to accelerate the practical application of lithium metal anodes.
Hikaru Enomoto, Fumisato Ozawa, Yusuke Himata, Shota Azuma, Akihiro Nomura, Morihiro Saito, JOURNAL OF POWER SOURCES 656, 238008-1-238008-8 (2025). "Control of the equilibrium potential of lithium naphthalenide solutions for effective lithium pre-doping of SiO negative electrodes"
DOI:10.1016/j.jpowsour.2025.238008
AI-Generated Summary:This study is about improving the initial Coulombic efficiency of silicon (SiO) anodes using lithium naphthalide (Li-NTL) solutions. The research prepared Li-NTL solutions using linear and cyclic ether solvents and investigated the effect of Li pre-doping depth on the initial Coulombic efficiency of SiO anodes. The results showed the effectiveness of controlling the solution structure and equilibrium potential by using different ether solvents.
Chia-Ching Lin, Kei Kubota, Yu Zhao, Denis Y.W. Yu, JOURNAL OF POWER SOURCES 648, 237417-1-237417-9 (2025). "Investigating the structural change and degradation mechanism of MnO2 for lithium-ion batteries"
DOI:10.1016/j.jpowsour.2025.237417
AI-Generated Summary:In this study, we systematically investigated the electrochemical behavior of β-MnO₂ as a cathode material for lithium-ion batteries, identified the main degradation mechanisms, and proposed surface modification strategies for performance enhancement. A 2 wt% Li₃PO₄ surface coating on β-MnO₂ particles improved the capacity retention and coulombic efficiency, especially at high cutoff voltages, by suppressing electrolyte decomposition.
Aman Shukla, Dhruba B. Khadka, Chunqing Li, Masahiro Rikukawa, Yuko Takeoka, Ryoji Sahara, Masatoshi Yanagida, Yasuhiro Shirai , Journal of Materials Chemistry A 13, 23487-23498 (2025). "Defect mitigation via fullerene-based functional additives for enhanced efficiency and stability in tin perovskite solar cells"
DOI:10.1039/D4TA08566C
AI-Generated Summary:This study aimed to suppress tin oxidation and improve device stability and efficiency by introducing fullerene-based multifunctional molecules (F-COOH, F-OH, and F-OSO₃H) as additives. This research demonstrated the importance of functional group selection in molecular design for enhancing the efficiency and stability of Sn-PSCs. These achievements are expected to contribute to the development of higher-performance lead-free solar cells.
Dhruba B. Khadka, Yan-Chen Kuo, Yi Zhen Li, Muhammad Waqas, You-Jia Xu, Masatoshi Yanagida, Hiroshi Nishihara, Kazuhito Tsukagoshi, Mitch M. C. Chou, Yasuhiro Shirai, Ying-Chiao Wang, ACS APPLIED MATERIALS & INTERFACES 17, 26813-26822 (2025). "Coordination Nanosheets Stabilizing Efficient Tin-Based Perovskite Solar Cells"
DOI:10.1021/acsami.5c05011
AI-Generated Summary:In this study, we propose a method to improve the performance of tin-based perovskite solar cells (Sn-PSCs) by adding terpyridine-zinc(II) (ZnTPY) coordination nanosheets (CONASHs). Sn-PSCs, a promising alternative to lead-based perovskites, have suffered from reduced efficiency and stability due to tin oxidation. This research highlights the importance of coordination nanosheets in fabricating high-quality tin perovskite films using ligands, contributing to the development of more efficient and stable Sn-PSCs.
Arghya Dutta, Shoichi Matsuda, BATTERIES & SUPERCAPS 8, e202400504-1-e202400504 (9) (2025). "Application of Noninvasive Imaging Techniques for High Energy Density Lithium Metal Rechargeable Batteries"
DOI:10.1002/batt.202400504
AI-Generated Summary:Lithium metal batteries (LMBs) hold the potential for superior energy densities over conventional lithium-ion batteries (LIBs), but their configuration—thick cathodes, thin lithium metal anodes, and minimal electrolyte—faces significant challenges due to the reactivity between lithium metal and non-aqueous electrolytes. This study explores recent advancements in X-ray and neutron-based techniques for characterizing high-energy LMBs, highlighting their potential to deepen our understanding of phase dynamics and contribute to the development of high-energy-density and robust batteries.
Yasuhiro DOMI, Hiroyuki USUI, Takumi ANDO, Ryuto TANAKA, Kazuma GOTOH, Takeo HOSHI, Kei NISHIKAWA, Hiroki SAKAGUCHI , ELECTROCHEMISTRY 93, 037009-1-037009-7 (2025). "Electrochemical Lithiation Mechanism of Nickel Silicide Electrode"
DOI:10.5796/electrochemistry.25-00015
AI-Generated Summary:In this study, we investigated the electrochemical lithiation mechanism of nickel silicide (NiSi₂), which is expected to be an anode material for lithium-ion batteries. As a result, it was shown that NiSi₂ is a promising anode material for lithium-ion batteries, and its reaction mechanism is lithiation within the crystal lattice, differing from surface reactions and phase separation.
Shanas Fatima, Dhruba B. Khadka, Masatoshi Yanagida, Sunil Kumar Singh, Yasuhiro Shirai, ACS APPLIED ENERGY MATERIALS 8, 4601-4608 (2025). "Effect of Alkali-Metal Additive on Rudorffite AgBiI4-Based Pb-Free Solar Cells"
DOI:10.1021/acsaem.5c00234
AI-Generated Summary:In this study, we report on the material properties and effects on solar cell devices when sodium iodide (NaI) is added as an alkali halide additive to bismuth silver iodide (AgBiI₄) with a rudolfite structure, which is expected to be a lead-free solar cell material. Additive engineering is an effective strategy for improving the efficiency and stability of AgBiI₄-based solar cells, suggesting its potential application in sustainable photovoltaics.
Shuai Tang, Jie Tang, Yimeng Wu, You-Hu Chen, Jun Uzuhashi, Tadakatsu Ohkubo, Masaki Takeguchi, Lu-Chang Qin, VACUUM 238, 114224-1-114224-5 (2025). "Stable and high current emission of electrons from a HfC nanoneedle field-emitter fabricated by focused ion beam"
DOI:10.1016/j.vacuum.2025.114224
AI-Generated Summary:In this study, we successfully fabricated and characterized HfC (hafnium carbide) nanoneedles with excellent electron emission properties and robust structures using a focused ion beam (FIB). HfC nanoneedle emitters are expected to be promising field emission point electron sources, especially for applications requiring high emission currents, due to their superior electron emission properties and stability.
Henan Wang, Yueying Peng, Ryota Tamate, Kei Nishikawa, Shuji Nakanishi, JOURNAL OF POWER SOURCES 641, 236801-1-236801-10 (2025). "Enhanced cycle performance of Li metal anodes by tailoring artificial interphase composed of hydrogen-bond-rich polymers"
DOI:10.1016/j.jpowsour.2025.236801
AI-Generated Summary:In this study, we focus on the design of artificial protective layers to suppress dendrite growth of lithium metal anodes in the development of next-generation high-energy-density batteries. Specifically, by using hydrogen-bonding polymer gels as artificial protective layers, we aimed to adjust mechanical properties, adapt to the volume changes of lithium metal anodes, and suppress dendrite growth. This study demonstrates the importance of customizing the mechanical properties of artificial protective layers according to operating conditions to improve the performance and lifespan of lithium metal anodes. This design framework contributes to the development of safer and more efficient energy storage technologies.
Yimeng Wu, Jie Tang, Shuai Tang, You-Hu Chen, Ta-Wei Chiu, Ankit Singh†, Masaki Takeguchi, Ayako Hashimoto, Lu-Chang Qin, JAPANESE JOURNAL OF APPLIED PHYSICS 64, 040904-1-040904-5 (2025). "Geometric influence on field emission characteristics of zirconium carbide nanoneedles"
DOI:10.35848/1347-4065/adcbf9
AI-Generated Summary:In this study, we fabricated oriented single-crystal ZrC nanoneedles using a dual-beam FIB-SEM system. Atomic characterization of the as-fabricated ZrC crystals confirmed the crystallographic orientation consistency and uniformity of the nanoneedles, ensuring tip stability and precision. These findings highlight the importance of geometric optimization in enhancing field emission performance, offering a scalable and efficient approach for developing high-performance electron sources for advanced electron beam applications.
Masanao Ishijima, Yu Sakano, Kentaro Okada, Tamao Ishida, Kiyoshi Kanamura, Toshihiko Mandai, Koichi Kajihara, 日本セラミックス協会学術論文誌 133, 562-568 (2025). "Atmospheric pressure hydrothermal synthesis and characterization of hollandite-type α-Mn1−xTixO2 for rechargeable magnesium battery cathodes"
DOI:10.2109/jcersj2.25049
AI-Generated Summary:In this study, a solid solution of Hollandite-type α-MnO₂ and TiO₂ (α-Mn₁−xTixO₂) was synthesized by hydrothermal method under atmospheric pressure for 2 hours as a cathode active material for rechargeable magnesium batteries. In this synthesis, Mn²⁺ ions were oxidized using ammonium persulfate [(NH₄)₂S₂O₈]. The highest capacity retention and the smallest increase in charging overpotential during cycling were observed for x = 0.2.
Toshihiko Mandai, CHEMSUSCHEM 18, e202500418-1-e202500418-17 (2025). "Mg Plating in Nonethereal Electrolyte Solutions: Fact or Misconception?"
DOI:10.1002/cssc.202500418
AI-Generated Summary:In this study, we outline Mg electrochemistry in ether-based and non-ether-based electrolytes and evaluate Mg plating/stripping activity by cyclic voltammetry (CV). As a result, it was confirmed that only some solvents, including ethers, amines, and dialkyl sulfones, support reversible Mg plating/stripping. On the other hand, in nitrile, amide, carbonate, and phosphate electrolytes, Mg plating was hardly observed, even though the CV response appeared reversible. We present a protocol for evaluating whether the proposed electrolyte system actually supports Mg plating/stripping.
Ruijie Zhu, Takashi Yabu, Cheng Yang, Huijun Yang, Akira Nasu, Toshihiko Mandai, Masaki Matsui, Hiroaki Kobayashi, ADVANCED ENERGY MATERIALS 15, 2502050-1-2502050-10 (2025). "Decoding Cathode‐Electrolyte Interface Issues in Conventional Ethers Electrolytes‐Based Magnesium Rechargeable Batteries"
DOI:10.1002/aenm.202502050
AI-Generated Summary:This study investigated the effect of electrolyte moisture content on magnesium secondary batteries (MRBs), which are promising as next-generation batteries, in achieving high voltages. The results suggest that the optimized BHFIP electrolyte has the potential to contribute to the stabilization of high-voltage MRBs. Furthermore, it was concluded that the development of moisture-resistant functional materials is essential for improving battery performance.
Naoaki Kuwata, Gen Hasegawa, Sihao Xing, Kenjiro Hashi, Yoshitaka Matsushita, Randy Jalem, Kazunori Takada, Hitoshi Onodera, Shuhei Yoshida, SOLID STATE IONICS 428, 116924-1-116924-8 (2025). "Fast lithium-ion diffusion in pyrochlore-type oxyfluoride Li1.25La0.58Nb2O6F"
DOI:10.1016/j.ssi.2025.116924
AI-Generated Summary:In this study, we elucidated the fast Li+ ion conduction in the recently discovered pyrochlore-type lithium lanthanum niobate oxyfluoride, Li₂–xLa(₁₊x)/₃□(₂x–₁)/₃Nb₂O₆F (□ = vacancy), using pulsed-field gradient NMR and impedance measurements. The results showed that Li⁺ ions in the pyrochlore-type oxyfluoride undergo an order-disorder phase transition. The insights gained in this study regarding the fast Li⁺ ion diffusion mechanism in pyrochlore-type oxyfluorides will contribute to the development of solid electrolytes with performance exceeding that of conventional solid electrolytes.
Yuki Nomura, Kazuo Yamamoto, Naoaki Kuwata, Tsukasa Hirayama, ACS ENERGY LETTERS 10, 1404-1410 (2025). "Imaging Phase Boundary Kinetics in Lithium Titanate Using Operando Electron Energy-Loss Spectroscopy"
DOI:10.1021/acsenergylett.5c00209
AI-Generated Summary:In this study, we visualized the phase boundary migration dynamics of lithium ions in lithium titanate by combining in-situ scanning transmission electron microscopy and electron energy loss spectroscopy. The results suggest that lithium titanate exhibits high-rate discharge performance due to a relatively low activation energy of 0.49 eV in the Li₄Ti₅O₁₂ phase.
Makoto Aoki, Tamao Shishido, Tetsuro Morooka, Takuya Nakanishi, Takuya Masuda, JOURNAL OF PHYSICAL CHEMISTRY C 129, 2122-2131 (2025). "Electrochemical Oxidative Desorption of Adsorbed Sulfur Species on (111) Surfaces of Single Crystals of Pure Pt and Pt-Based Bimetallic Alloys"
DOI:10.1021/acs.jpcc.4c06652
AI-Generated Summary:In this study, we investigated the adsorption and desorption behavior of sulfur species on a pure Pt(111) surface and Pt₃M(111) (M = Co, Cu, Fe, Pd) binary alloy surfaces using electrochemical measurements and X-ray photoelectron spectroscopy (XPS). The results revealed the mechanism of sulfur poisoning on Pt-based alloy surfaces and suggested potential applications in catalyst design.
Shuyu Dong, Yiyi Zheng, Qiaohui Duan, Yu Zhao, Tian Tan, Yu Zhou, Tian Rao, Hanbing Yan, Weiqian Guo, Denis Y. W. Yu, JOURNAL OF MATERIALS CHEMISTRY A 13, 9453-9461 (2025). "Surface-modified BaTiO3 as functional filler in poly(ethylene oxide)-based solid polymer electrolyte for lithium-metal battery"
DOI:10.1039/D5TA00072F
AI-Generated Summary:In this study, barium titanate nanoparticles coated with 3-(triethoxysilyl)propionitrile (BTO@TESPN) were introduced as solid fillers to enhance the ionic conductivity and mechanical strength of polyethylene oxide (PEO)-based polymer electrolytes. The results demonstrated an innovative approach to reinforce PEO-based solid polymer electrolytes by tailoring the interface between the fillers and the polymer matrix.
K. Niitsu, F. Ichihara, S. Miyoshi, M. Ode, K. Mitsuishi, T. Masuda, K. Takada, SOLID STATE IONICS 421, 116804-1-116804-10 (2025). "Structural analysis of the LiCoO2 cathodes/garnet-type Li6.5La3Zr1.5Ta0.5O12 solid electrolyte interface"
DOI:10.1016/j.ssi.2025.116804
AI-Generated Summary:In this study, the sinterability of an oxide cathode, LiCoO₂, and a garnet-type solid electrolyte, Li₇-xLa₃Zr₂-xTaxO₁₂ (x = 0.5), was evaluated at 980°C and 1080°C. In particular, the interface between LiCoO₂ and Li₇-xLa₃Zr₂-xTaxO₁₂ was analyzed using a combination of scanning transmission electron microscopy and spectroscopic techniques. The results demonstrated the importance of interface control between the electrode and electrolyte in all-solid-state batteries. Optimizing sintering conditions to achieve high densification while maintaining good ionic conductivity will be a future challenge.
Feye-Feng Lu, Huu Duc Luong, Seong-Hoon Jang, Randy Jalem, Yoshitaka Tateyama, Hong-Kang Tian, JOURNAL OF POWER SOURCES 628, 235906-1-235906-10 (2025). "Dual influence of protonation on Li-ion transport in garnet solid electrolytes: A first-principles study"
DOI:10.1016/j.jpowsour.2024.235906
AI-Generated Summary:In this study, we investigated the effects of protonation on the structural changes and Li-ion transport of LLZO using DFT and DFT-MD simulations. As a result, it was found that protonation causes LLZO to undergo a phase transition to a distorted non-centrosymmetric structure, thereby reducing Li-ion conductivity.
Yueying Peng, Kei Nishikawa, Cell Reports Physical Science 6, 102439-1-102439-15 (2025). "Three-dimensional imaging of the microstructure of lithium metal anode using Xenon plasma focused ion beam"
DOI:10.1016/j.xcrp.2025.102439
AI-Generated Summary:In this study, we successfully achieved high-resolution and large-volume 3D reconstruction of electrodeposited lithium's microstructure with a resolution of 50 nm per pixel and a volume of 200 μm, using a Xe plasma focused ion beam scanning electron microscope (FIB-SEM). This research deepens the understanding of the relationship between the 3D microstructure and performance of electrodeposited lithium, which is essential for improving the performance of lithium metal batteries, and provides an innovative method for electrode evaluation and optimization.
Marcela Calpa, Kei Kubota, Jittraporn Saengkaew, Shoichi Matsuda, Kazunori Takada, JOURNAL OF POWER SOURCES 634, 236473-1-236473-8 (2025). "The Role of Grain Boundaries in Suppressing Particle Fracture in Li-Rich Layered Oxide Cathode Materials"
DOI:10.1016/j.jpowsour.2025.236473
AI-Generated Summary:In this study, we discovered that polycrystallinity, achieved by reducing both grain size and crystallite size, is an effective strategy for enhancing fracture resistance, using Li₂RuO₃ as a model material. The refinement of grains alleviates stress at grain boundaries, preventing intergranular fracture. Furthermore, grain boundaries also act as barriers that suppress the propagation of transgranular fracture. This grain boundary-induced fracture suppression effect improved the capacity retention of Li₂RuO₃ from 67% to 95% after 50 cycles.
Majid Ghanimati, Mohsen Lashgari, Masaki Takeguchi, Fabio Montagnaro, Marco Balsamo, INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 105, 1217-1229 (2025). "Highly adsorptive/effective rGO/pn-junction nanocomposite to generate hydrogen fuel using H2S: Rational photocatalyst design and magnetic boosting"
DOI:10.1016/j.ijhydene.2025.01.278
AI-Generated Summary:In this study, we developed a novel nanocomposite material, rGO/CoMn₂O₄(p)-ZnO(n), for the efficient and environmentally friendly conversion of hydrogen sulfide (H₂S) emitted from the oil and gas industry into hydrogen fuel without the use of external reducing agents. This material was synthesized via a one-pot hydrothermal method. This research presents a new economical and environmentally friendly approach to effectively utilize industrial waste H₂S to generate clean hydrogen fuel. In particular, the enhancement of activity using an external magnetic field can be a crucial factor for practical application.
Nithya Hellar, Yoshiki Iwai, Masato Ohzu, Sebastian Brox, Arunkumar Dorai, Reiji Takekawa, Naoaki Kuwata, Junichi Kawamura, Martin Winter, Communications Materials 6, 1-7 (2025). "Direct observation of Mn-ion dissolution from LiMn2O4 lithium battery cathode to electrolyte"
DOI:10.1038/s43246-025-00733-2
AI-Generated Summary:In this study, we focused on the metal ion dissolution from spinel-type LiMn₂O₄（LMO） cathodes, particularly the dissolution of Mn²⁺, as a cause of degradation in lithium-ion batteries. We established a technique to efficiently observe the dissolution process using in-situ ¹H nuclear magnetic resonance imaging (MRI). This in-situ MRI technique has the potential to resolve long-standing questions regarding the timing, location, and mechanism of metal ion dissolution in lithium-ion battery electrodes, and is expected to be applicable to other electrochemical systems.
Kaiming Xue, Qiaohui Duan, Kotaro Imaizumi, Hongfei Li, Denis Y.W. Yu, ELECTROCHIMICA ACTA 514, 145690-1-145690-8 (2025). "Improving reversibility and reducing overpotential of Cu–Zn battery with electrolyte engineering and cation-selective membrane"
DOI:10.1016/j.electacta.2025.145690
AI-Generated Summary:In this study, we developed a reversible copper-zinc battery using a cation-selective membrane to enhance its appeal as an alternative battery system to copper-zinc batteries with inexpensive and non-toxic raw materials.
Yimeng Wu, Jie Tang, Shuai Tang, You-Hu Chen, Ta-Wei Chiu, Masaki Takeguchi, Ayako Hashimoto, Lu-Chang Qin , Nanomaterials 15, 93-1-93-10 (2025). "Stable Field Emissions from Zirconium Carbide Nanoneedle Electron Source"
DOI:10.3390/nano15020093
AI-Generated Summary:In this study, we fabricated a single zirconium carbide (ZrC) nanoneedle structure oriented in the <100> direction using a dual-beam focused ion beam (FIB-SEM) system and evaluated its field emission properties and emission current stability. This work demonstrates an efficient and controllable method for nanostructure fabrication and suggests the potential of transition metal compounds like ZrC as field emission emitters and future electron sources for electron beam devices.
Reona Iimura, Shiori Kawasaki, Takashi Yabu, Shinnosuke Tachibana, Kazuya Yamaguchi, Toshihiko Mandai, Kazuaki Kisu, Naoto Kitamura, Zhirong Zhao-Karger, Shin-ichi Orimo, Yasushi Idemoto, Masaki Matsui, Maximilian Fichtner, Itaru Honma, Tetsu Ichitsubo, Hiroaki Kobayashi, Small 21, 2411493-1-2411493-10 (2025). "Ultrasmall α‐MnO2 with Low Aspect Ratio: Applications to Electrochemical Multivalent‐Ion Intercalation Hosts and Aerobic Oxidation Catalysts"
DOI:10.1002/smll.202411493
AI-Generated Summary:In this study, we synthesized ultrasmall α-MnO₂ particles with a low aspect ratio (c/a ≈ 2) and a size of less than 10 nm via an alcohol solution process. The results suggest that ultrasmall α-MnO₂ has the potential to bring innovation in both energy storage and catalysis, contributing to the development of green energy technologies.
V. Wang, J.B. Lin, E.Z. Liang, T. Ohno, J. Nara, W.T. Geng, PHYSICA B-CONDENSED MATTER 699, 416873-1-416873-6 (2025). "Effect of direct interlayer coupling on the moiré potentials in twisted WSe2/MoSe2 heterobilayers"
DOI:10.1016/j.physb.2024.416873
AI-Generated Summary:In this study, we analyzed the electronic structure of unstrained rigid-twist WSe₂/MoSe₂ bilayer structures using density functional theory (DFT) and investigated the effect of direct interlayer coupling on the moiré potential. As a result, we found that direct interlayer coupling induces a significant moiré potential even without strain.
Shinichi Takeno, Taiki Suematsu, Ryusei Kunisaki, Gen Hasegawa, Ken Watanabe, Naoaki Kuwata, Kazutaka Mitsuishi, Tsuyoshi Ohnishi, Kazunori Takada, Kohichi Suematsuc, Kengo Shimanoe, Journal of Materials Chemistry A 13, 2943-2949 (2025). "New insight into designing a thick-sintered cathode for Li-ion batteries: the impact of excess lithium in LiCoO2 on its electrode performance"
DOI:10.1039/d4ta07377k
AI-Generated Summary:This study focuses on thick, high-density electrodes using active material sintered disks to address the challenge of increasing lithium-ion battery capacity. Specifically, we selected LiCoO₂ as the positive electrode active material and investigated the effects of excess lithium (Li). The results demonstrated that controlling the amount of excess Li in LiCoO₂ sintered cathodes is crucial for improving their electrochemical performance as electrodes.
Dhruba B. Khadka, Yasuhiro Shirai, Ryoji Sahara, Masatoshi Yanagida, Kenjiro Miyano, Small 21, 2410048-1-2410048-10 (2025). "Ameliorating Defects in Wide Bandgap Tin Perovskite Solar Cells Using Fluorinated Solvent and Hydrazide"
DOI:10.1002/smll.202410048
AI-Generated Summary:In this study, we investigated molecular surface passivation using tin perovskite (WB-Sn-HP) and 4-fluorobenzohydrazide (F-BHZ) to enhance the performance and stability of wide bandgap perovskite solar cells (PSCs). The results demonstrated the potential of chemical engineering to improve the device performance and stability of WB-Sn-PSCs by employing multifunctional passivation molecules.
Gerson Mette, Kunie Ishioka, Steven Youngkin, Wolfgang Stolz, Kerstin Volz, Ulrich Höfer, Advanced Materials Interfaces 12, 2400573-1-2400573-6 (2025). "Interface-Specific Excitation of Coherent Phonons at the Buried GaP/Si(001) Heterointerface"
DOI:10.1002/admi.202400573
AI-Generated Summary:In this study, we investigated in detail the ultrafast dynamics of charge carriers and phonons at the embedded heterointerface of GaP/Si(001) using two-color pump-probe reflectivity measurements. The results provided important insights for deepening the understanding of ultrafast dynamics at the GaP/Si heterointerface, particularly concerning the interaction between phonons and electrons.
Dhruba B. Khadka, Masatoshi Yanagida, Yasuhiro Shirai, SOLAR ENERGY MATERIALS AND SOLAR CELLS 281, 113319-1-113319-8 (2025). "Assessing degradation in perovskite solar cells via thermal hysteresis of photocurrent and device simulation"
DOI:10.1016/j.solmat.2024.113319
AI-Generated Summary:In this study, we analyze the degradation of PSCs by investigating the thermal hysteresis of photocurrent (THPC) and the dynamics of thermally activated ionic or recombination processes. This work highlights a direct correlation between PSC degradation and the presence of thermally activated traps and interfacial charge accumulation, suggesting that passivating these pathways is crucial for improving device stability.
Takatsugu Wakahara, Chika Hirata, Dorra Mahdaoui, Kazuko Fujii, Yoshitaka Matsushita, Osamu Ito, Makito Takagi, Tomomi Shimazaki, Masanori Tachikawa, Shinjiro Yagyu, Yubin Liu, Yoshiyuki Nakajima, Takuro Nagai, Kazuhito Tsukagoshi, CARBON 233, 119838-1-119838-8 (2025). "One-dimensional C60 Arrays in Noncovalent Benzidine Networks"
DOI:10.1016/j.carbon.2024.119838
AI-Generated Summary:In this study, we successfully synthesized novel one-dimensional oriented C₆₀ in single-crystalline nanosheets formed from C₆₀ and N,N,N′,N′-tetraphenylbenzidine (TPB). As a result, the C₆₀/TPB nanosheets exhibited a distinct absorption band in the near-infrared region, suggesting that charge transfer interactions occurred between the C₆₀ and TPB frameworks within the co-crystal.
Daisuke Shibata, Toshiaki Ohta, Yuki Orikasa, Kimihiko Ito, Kiyotaka Asakura, e-Journal of Surface Science and Nanotechnology 23, 36-43 (2025). "A Voxel Method for Correcting the Self-absorption Effect in Fluorescence X-ray Absorption Fine Structure Spectra"
DOI:10.1380/ejssnt.2025-010
AI-Generated Summary:In this study, we proposed the "voxel method," which can handle samples of arbitrary shapes, as a correction method for self-absorption effects in PFY-XAFS spectroscopy in the soft X-ray region. We verified the validity, advantages, and limitations of this method using O K-edge PFY-XAFS spectra of CoO single crystal, Li₂CO₃ thin film on NiO substrate, and CoO powder samples.
Masanao Ishijima, Arisa Omata, Kiyoshi Kanamura, Toshihiko Mandai, Xiatong Ye, Tetsu Ichitsubo, Koichi Kajihara, RSC Applied Interfaces 2, 179-184 (2025). "Oxalate-assisted Fe2O3 surface functionalization of nanosized MgMn2O4 and α-MnO2 cathodes for rechargeable magnesium batteries"
DOI:10.1039/d4lf00290c
AI-Generated Summary:In this study, we utilized the ability of oxalate ions to bridge transition metal ions to form a thin and uniform Fe₂O₃ layer on MgMn₂ O₄ and α-MnO₂ nanoparticles. The resulting Fe₂O₃ layer effectively suppressed side reactions during the insertion and extraction of Mg²⁺ ions, thereby improving the capacity retention and cycling performance.
Kazutaka Mitsuishi, Fumiaki Ichihashi, Yoshio Takahashi, Katsuaki Nakazawa, Masaki Takeguchi, Ayako Hashimoto, Toshiaki Tanigaki, MICROSCOPY 74, 92-97 (2025). "Resolution improvement of differential phase-contrast microscopy via tilt-series acquisition for environmental cell application"
DOI:10.1093/jmicro/dfae049
AI-Generated Summary:In this study, we developed a simple method to improve the phase measurement resolution of differential phase contrast scanning transmission electron microscopy (STEM) in closed environmental cell applications and verified it with a model sample simulating environmental cell observation. As a result, we demonstrated that high phase accuracy of 2π/100 radians is achievable for samples in environmental cells.
Kosuke Kawai, Seong-Hoon Jang, Yuta Igarashi, Koji Yazawa, Kazuma Gotoh, Jun Kikkawa, Atsuo Yamada, Yoshitaka Tateyama, Masashi Okubo, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 64, e202410971-1-e202410971-8 (2025). "Proton Intercalation into an Open-Tunnel Bronze Phase with Near-Zero Volume Change"
DOI:10.1002/anie.202410971
AI-Generated Summary:In this study, we report that Mo₃Nb₂O₁₄ bronze exhibits highly efficient (99.7%) and reversible H+ insertion (200 mAh g-1) via a solid-solution-type phase transition with almost no volume change. Experimental and theoretical calculations revealed that the flexible structure of Mo₃Nb₂O₁₄ alleviates strain during H⁺ insertion, suppressing cracking within the particles. This study suggests the importance of implementing "strain-relieving voids" in host materials for suppressing volume changes.
Hong Pang, Cédric Bourgès, Naohito Tsujii, Jha Rajveer, Naoyuki Kawamoto, Fumihiko Ichihara, Takahiro Baba, Tetsuya Baba, Naoki Sato, Yuichi Yamasaki, Takao Mori, ACS Materials Letters 7, 715-723 (2025). "Zinc Stabilized Chalcopyrite Thin Film for Enhanced Thermoelectric Power Generation Near Room Temperature"
DOI:10.1021/acsmaterialslett.4c01898
AI-Generated Summary:In this study, we found that Zn promotes the stabilization of the chalcopyrite structure and cation ordering of CuFeS₂, preventing the reverse transformation to wurtzite at high temperatures. The insights into cation ordering and phase transitions between polymorphs of CuFeS₂ obtained in this study are expected to contribute to the advancement of fabrication techniques for multi-component sulfide thin films and the improvement of efficiency in renewable energy devices.
Akihiro Nomura, Shota Azuma, Fumisato Ozawa, Morihiro Saito, JOURNAL OF POWER SOURCES 633, 236426-1-236426-13 (2025). "Highly porous carbon nanotube air-electrode combined with low-viscosity amide-based electrolyte enabling high-power, high-energy lithium-air batteries"
DOI:10.1016/j.jpowsour.2025.236426
AI-Generated Summary:This study proposes an innovative approach to overcome the practical challenge of low rate capability in lithium-air batteries (LABs), achieving both high energy density and high power output. The high-power, high-energy-density LAB demonstrated in this study paves the way for the development of ultra-lightweight aircraft batteries. This innovative technology is expected to find applications in drones and other small aircraft.
Fumisato Ozawa, Yusuke Himata, Hikaru Enomoto, Shota Azuma, Akihiro Nomura, Morihiro Saito, ACS APPLIED ENERGY MATERIALS 8, 4370-4378 (2025). "Correlations between Li-Ion Concentration, Solvation Structure, and Equilibrium Potential of Li-Naphthalenide Solutions for Li Alloying of Si Negative Electrode of Next-Generation Batteries"
DOI:10.1021/acsaem.4c03286
AI-Generated Summary:This study aims to improve the performance of silicon (Si) negative electrodes (NEs) in next-generation batteries by proposing a Li pre-doping technique using a Li–naphthalene (Li–NTL) solution. The research prepared a Li–NTL solution with Li foil, naphthalene, and 2-methyltetrahydrofuran as the solvent, and investigated the effect of Li concentration on the Li alloying behavior of Si NEs. In conclusion, it was shown that the Li concentration in the Li–NTL solution is a crucial factor in controlling the amount of dianions and determining the depth of Li alloying in Si NEs.
Katsunori Tagami, Takahisa Ohno, Jun Nara, Mamoru Usami, JAPANESE JOURNAL OF APPLIED PHYSICS63,023001-1-023001-6(2024). "Magnetic structures and magnetic anisotropy of Mn3−xFexSn studied by first-principles calculations"
DOI:10.35848/1347-4065/ad2303
AI-Generated Summary:In this study, we theoretically investigated the wide range of x dependence in Kagome structure Mn₃-xFexSn crystals using first-principles calculations, clarifying the magnetic structure and magnetic anisotropy by examining lattice constants, bond lengths, and the stability of six magnetic phases. These results contribute to the understanding of the structure and magnetic anisotropy of Kagome Mn₃-xFexSn crystals.
Shoichi Matsuda, ChemElectroChem11,e202300605-1-e202300605-8(2024). "New Insights into Fundamental Processes and Physical Degradation Mechanisms in Rechargeable Lithium-Oxygen Batteries Providing Suitably High Energy Densities"
DOI:10.1002/celc.202300605
AI-Generated Summary:This study emphasizes the importance of exploring new technologies, such as gas diffusion layers and lightweight protective films for lithium metal electrodes, as an approach toward realizing LOBs with the energy density required for practical applications. The topics presented in this study are expected to promote new research directions for the development of LOBs with high energy density and long cycle life.
Esmail Doustkhah, Nao Tsunoji, Shinya Mine, Takashi Toyao, Ken-ichi Shimizu, Tetsuro Morooka, Takuya Masuda, M. Hussein N. Assadi, Yusuke Ide, ACS Applied Materials & Interfaces16,10251-10259(2024). "Feeble Single-Atom Pd Catalysts for H2 Production from Formic Acid"
DOI:10.1021/acsami.3c18709
AI-Generated Summary:In this study, we investigated the catalytic ideality of single-atom Pd (PdsA) for H₂ generation from formic acid using three types of silica supports (mesoporous silica modified with thiol, amine, and dithiocarbamate functional groups). This research is important for understanding how support interactions influence catalytic activity and stability in the design of single-atom catalysts. Specifically, it was revealed that PdsA on amine-functionalized silica exhibits a trade-off between its high activity and aggregation.
Xin Zhao, Wan-Peng Li, Yanhui Cao, Arsenii Portniagin, Bing Tang, Shixun Wang, Qi Liu, Denis Y. W. Yu, Xiaoyan Zhong, Xuerong Zheng, Andrey L. Rogach, ACS Nano18,4256-4268(2024). "Dual-Atom Co/Ni Electrocatalyst Anchored at the Surface-Modified Ti3C2Tx MXene Enables Efficient Hydrogen and Oxygen Evolution Reactions"
DOI:10.1021/acsnano.3c09639
AI-Generated Summary:This study proposes a novel approach to accelerate the kinetics of the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) by constructing diatomic catalytic sites on conductive substrates. This work provides guidance for constructing diatomic active metal sites on MXene substrates to synergistically enhance the electrochemical efficiency and stability of energy conversion and storage systems.
Shoichi Matsuda, Eiki Yasukawa, Shin Kimura, Shoji Yamaguchi, Kohei Uosaki, FARADAY DISCUSSIONS248,341-354(2024). "Evaluation of performance metrics for high energy density rechargeable lithium–oxygen batteries"
DOI:10.1039/D3FD00082F
AI-Generated Summary:In this study, we prototyped stacked cell configuration LOBs and conducted performance evaluations under various experimental conditions to elucidate specific degradation phenomena under dilute electrolyte and high areal capacity conditions. The results obtained in this study demonstrate the importance of these factors in evaluating performance indicators of LOBs, including cycle life and round-trip energy efficiency.
Dhruba B. Khadka, Yasuhiro Shirai, Masatoshi Yanagida, Hitoshi Ota, Andrey Lyalin, Tetsuya Taketsugu, Kenjiro Miyano, Nature Communications15,882-1-882-16(2024). "Defect passivation in methylammonium/bromine free inverted perovskite solar cells using charge-modulated molecular bonding"
DOI:10.1038/s41467-024-45228-9
AI-Generated Summary:In this study, we investigated the effect of diammonium molecules as a molecular passivation strategy to improve the performance and stability of methylammonium-free perovskite solar cells (HPSCs). This research suggests the importance of bifunctional molecules with strong surface adsorption in defect mitigation and is expected to contribute to the design of charge-controlling molecular passivation for enhancing the performance and stability of HPSCs.
Itsuki Konuma, Naohiro Ikeda, Benoît D.L. Campéon, Hinata Fujimura, Jun Kikkawa, Huu Duc Luong, Yoshitaka Tateyama, Yosuke Ugata, Masao Yonemura, Toru Ishigaki, Taira Aida, Naoaki Yabuuchi, Energy Storage Materials66,103200-1-103200-11(2024). "Unified Understanding and Mitigation of Detrimental Phase Transition in Cobalt-free LiNiO2"
DOI:10.1016/j.ensm.2024.103200
AI-Generated Summary:In this study, we investigate the cause of detrimental phase transitions in LiNiO₂ through a detailed analysis of LiNiO2 incorporating nano-sized Li₃PO₄ obtained from metastable rock-salt type LiNiO₂–Li₃PO₄ solid solution samples. The results demonstrate that a unified understanding of the degradation mechanism of LiNiO₂ can lead to design guidelines for cobalt-free LiNiO₂ that do not rely on metal substitution, thereby maximizing the reversible capacity of layered materials.
Jittraporn Saengkaew, Emiko Mizukia, Shoichi Matsuda, Energy Advances3,248-254(2024). "Performance evaluation of lithium metal rechargeable batteries with a lithium excess cation-disordered rocksalt based positive electrode under high mass loading and lean electrolyte conditions"
DOI:10.1039/d3ya00281k
AI-Generated Summary:In this study, we focused on Li₂RuO₃/Li₂SO₄ as a representative example of DRX materials and evaluated its performance under practical cell-level conditions (high mass loading, lean electrolyte). The results strongly suggest that DRX-based cathodes can exhibit high performance even under practical battery conditions, providing important insights for the future development of high-energy-density batteries.
Ridwan P. Putra, Kyosuke Matsushita, Tsuyoshi Ohnishi, Takuya Masuda, Journal of Physical Chemistry Letters15,490-498(2024). "Operando Nanomechanical Mapping of Amorphous Silicon Thin Film Electrodes in All-Solid-State Lithium-Ion Battery Configuration during Electrochemical Lithiation and Delithiation"
DOI:10.1021/acs.jpclett.3c03012
AI-Generated Summary:In this study, we constructed an operando bimodal atomic force microscopy system to observe the nanomechanical properties of amorphous Si thin films, an electrode material for lithium-ion batteries, in real-time during electrochemical lithiation and delithiation processes. This research is important for deepening the understanding of the electrochemical reaction mechanism of Li-Si electrodes.
Toshihiko Mandai, Umi Tanaka, Mariko Watanabe, Energy Storage Materials67,103302-1-103302-10(2024). "Mg–Zn–Cl-integrated functional interface for enhancing the cycle life of Mg electrodes"
DOI:10.1016/j.ensm.2024.103302
AI-Generated Summary:In this study, surface engineering techniques were employed to improve the passivation characteristics of the reductive Mg electrode. The technology developed in this research opens up new avenues for evaluating interfacial behavior under harsh and dilute electrolyte conditions, contributing to the development of an important and unexplored research area in RMB chemistry.
Hydrogen Technology Materials Field
Nasrat Hannah Shudin, Ryuto Eguchi, Shigenori Ueda, Ankit Singh, Ayako Hashimoto, Hideki Abe, Journal of Materials Chemistry A 13, 9660-9664 (2025). "A heteroepitaxial interface of Pt//CeO2 nanoparticles for enhanced catalysis of the oxygen reduction reaction (ORR)"
DOI:10.1039/D4TA07380K
AI-Generated Summary:This study demonstrates that introducing heteroepitaxial interfaces into nanometer-sized MON can enhance catalytic performance. Pt//CeO₂ with this interface exhibited superior catalytic activity in the oxygen reduction reaction (ORR) in basic media compared to conventional Pt catalysts and large-sized Pt//CeO₂ catalysts.
Islam M. El-Sewify, Mohamed A. Shenashen, Moataz Mekawy, Mohamed S. Selim, Mohammed Y. Emran, Mohamed Khairy, Rasha F. El-Agamy, Mahmoud M. Selim, Ahmed Shahat, Mostafa M.H. Khalil, Ahmed Elmarakbi, Mitsuhiro Ebara, Sherif A. El-Safty , COLLOIDS AND SURFACES B-BIOINTERFACES 254, 114773-1-114773-13 (2025). "Trapping/Monitoring of Toxic Arsenate in Human Skin Cell Lines: A Route for Preventing Skin Disorders"
DOI:10.1016/j.colsurfb.2025.114773
AI-Generated Summary:In this study, we developed a highly sensitive detection and monitoring technology for toxic arsenite, a causative agent of skin diseases, in human skin cell lines. The results show that meso-scale geode-like pores have excellent properties for the in vitro capture and quantification of toxic arsenite within human skin cells due to the accumulation of carcinogenic toxins, providing a new approach for the prevention of skin diseases.
Takafumi D. Yamamoto, Hiroyuki Takeya, Kensei Terashima, Akiko T. Saito, Yoshihiko Takano, PHYSICAL REVIEW B 112, 024423-1-024423-6 (2025). "Highly anisotropic magnetic phase diagram of the ferromagnetic rare-earth diboride HoB2"
DOI:10.1103/ps2l-c434
AI-Generated Summary:In this study, we succeeded in growing single crystals of the rare-earth compound HoB₂ and investigated its magnetic properties in detail. Our results suggest that HoB₂ exhibits a strong competition between in-plane and out-of-plane magnetic anisotropy, which is believed to give rise to a unique FM spin configuration.
T. Tamegai, R. Sakagami, T. Ito, K Takinoiri, A. Kikuchi, M. Yamamoto, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 35, 7300105-1-7300105-5 (2025). "Comparison of Jc Characteristics Among (Ba,Na)Fe2As2 Wires and Tapes Fabricated by Different Methods"
DOI:10.1109/TASC.2024.3513284
AI-Generated Summary:In this study, we compared the critical current density (Jc) characteristics and uniformity of (Ba,Na)Fe2As2 wires and tapes fabricated using different methods and sheath materials. The results demonstrated the importance of fabrication methods and material selection for improving the performance of superconducting wires and tapes made of (Ba,Na)Fe2As2.
Satsuki Okumura, Yutaka Terao, Hiroyuki Ohsaki, Akihiro Kikuchi, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 35, 5901005-1-5901005-5 (2025). "Evaluation of Coupling Currents in MgB2 Wire Under Rotating Magnetic Field Using Numerical Analysis"
DOI:10.1109/TASC.2025.3527950
AI-Generated Summary:In this study, we report the numerical analysis results using finite element analysis on the AC loss when a rotating magnetic field is applied to MgB2 wires. As a result, it was shown that it can be explained by the existing theoretical formula for coupling loss.
Emanuela Barzi, Masaki Takeuchi, Daniele Turrioni, Akihiro Kikuchi, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 35, 4101305-1-4101305-5 (2025). "Performance Improvement of LTS Undulators for Synchrotron Light Sources"
DOI:10.1109/TASC.2025.3540817
AI-Generated Summary:This research was conducted jointly by ANL and FNAL, and the Nb₃Sn undulator magnet currently in operation at ANL's Advanced Photon Source (APS) was developed. As a result, the Nb₃Sn undulator can operate very close to its short sample limit, and is expected to expand the energy range and brightness of light sources. It is also applicable to the impregnation of planar, helical, and universal devices operating in environments with lower radiation doses than high-energy colliders.
SeokBeom Kim, Tomoya Sakamoto, Riku Onoue, Satoshi Nishikori, Ryota Inoue, Hiroshi Ueda, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 35, 6000404-1-6000404-4 (2025). "Critical Current and AC Loss Characteristics of Ultrafine Nb3Al and Nb3Sn Superconducting Wires Under Conduction Cooling"
DOI:10.1109/TASC.2024.3513936
AI-Generated Summary:This study concerns the characterization of Nb3Al and Nb3Sn superconducting ultrafine wires with diameters less than 50 µm, developed by the National Institute for Materials Science (NIMS). These wires enable the manufacturing of superconducting magnets using the React and Wind (R&W) method and are expected to be applied in DC and AC applications. This study suggests that the developed Nb3Al and Nb3Sn ultrafine wires have the potential for application in DC and AC applications in their respective characteristics. In particular, the low AC loss of Nb3Al wires is considered advantageous for AC applications.
Y. Hishinuma, H. Oguro, H. Noto, H. Yata, H. Taniguchi, S. Awaji, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 35, 6001404-1-6001404-4 (2025). "Mechanical Strength Enhancement of the Internal Matrix Reinforced Nb3Sn Multifilamentary Wires Using Cu-Sn-In Ternary Bronze Alloy Matrices by HIP Processing"
DOI:10.1109/TASC.2025.3540804
AI-Generated Summary:In this study, we investigated the effect of hot isostatic pressing (HIP) treatment on further improving the mechanical strength of internally matrix-reinforced Nb3Sn wires. The results showed that HIP treatment contributes to the improvement of the mechanical strength of internally matrix-reinforced Nb3Sn wires.
Ryuichi Ueki, Norihito Ohuchi, Akihiro Kikuchi, Masaru Yamamoto, Kazuyuki Aoki, Yasushi Arimoto, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 35, 6001105-1-6001105-5 (2025). "Study on the Supercondicting Performance of Ultra-fine Strand Nb3Al Cables"
DOI:10.1109/TASC.2025.3532235
AI-Generated Summary:In this study, we developed a Nb3Al superconducting ultrafine wire with a wire diameter of 50 μm for a coil magnet and measured the critical current of the cable as a function of bending radius and temperature. As a result, we reported the temperature dependence of the critical current of the bent Nb3Al cable after heat treatment.
Xudong Wang, Kiyosumi Tsuchiya, Akio Terashima, Suguru Tanabe, Nobuyuki Negishi, Akihiro Kikuchi, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 35, 4800505-1-4800505-5 (2025). "Critical Current Measurements on Round Cables Made With a REBCO Stack Conductor"
DOI:10.1109/TASC.2024.3520940
AI-Generated Summary:In this study, we developed a "stacked conductor" by soldering two REBCO layers of coated conductors facing each other. As a result, it was shown that cables can be manufactured with a smaller core diameter than before. In this study, we report the cable Ic measured at 77K and the strain of the REBCO layer with respect to the core diameter. Furthermore, we detail the measurement of the magnetic field-dependent Ic of the coated conductor at 4.2K and the estimation of the cable Ic at 20T and 4.2K based on it.
Xudong Wang, Akihiro Kikuchi, Masaki Takeuchi, Tatsushi Nakamoto, Kiyosumi Tsuchiya, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 35, 7700104-1-7700104-4 (2025). "Flexural Properties of an Organic Olefin-Based Thermosetting Dicyclopentadiene Resin for Superconducting Magnet Impregnation"
DOI:10.1109/TASC.2025.3537947
AI-Generated Summary:In this study, we evaluated the physical properties of dicyclopentadiene (DCP) resin, an organic olefinic thermosetting resin, TELENE (manufactured by RIMTEC). As a result, pure TELENE showed plastic deformation before irradiation, and its strength improved with irradiation up to 2 MGy. The flexural modulus of pure and mixed TELENE continuously increased with irradiation up to 25 MGy.
J Kováč, P Kováč, M Búran, T Melišek, K Gažová, A Kikuchi, SUPERCONDUCTOR SCIENCE & TECHNOLOGY 38, 055028-1-055028-7 (2025). "DC and AC properties of 49-strand circular cables made of differently sheathed ultrafine MgB2 superconducting wires"
DOI:10.1088/1361-6668/add439
AI-Generated Summary:In this study, we report on the low-temperature characteristics of a 49-core circular cable made of ultrafine MgB₂ wires. Experimental results show that a high engineering current density can be achieved despite the very small filament size of 8.5 µm. We also found that the AC loss is low due to the good separation of the strands. The cable presented in this study has the potential for use in small coil applications with low AC loss.
Koichi Matsumoto, Masaki Horie, Hironori Hasegawa, Kazuhiro Ishikawa, Shuhei Yamazaki, Hideaki Kitazawa, Akiko T. Saito, Takenori Numazawa, JOURNAL OF APPLIED PHYSICS 138, 033901-1-033901-11 (2025). "Giant magnetocaloric effect of divalent europium-based oxide composites of Eu2TiO4 and Eu3Ti2O7 for cryogenic temperature magnetic refrigeration"
DOI:10.1063/5.0278479
AI-Generated Summary:In this study, we synthesized sintered composite materials of Eu₂TiO₄ and Eu₃Ti₂O₇ as cryogenic magnetic refrigeration materials containing Eu²⁺ ions. The results showed that the composite materials of Eu₂TiO₄ and Eu₃Ti₂O₇ are promising magnetocaloric materials for cryogenic magnetic refrigeration.
William Moore, Shusaku Shoji, Lieihn Tsaur, Fei Yu, R. Paxton Thedford, William R. Tait, M. Sadegh Riasi, Aniruddha Saha, Kayhun Hur, Austin Reese, Ali Y. Kozbek, Sarah A. Hesse, Sol M. Gruner, Lilit Yeghiazarian, Sadaf Sobhani, Jin Suntivich, Ulrich B. Wiesner, ACS NANO 19, 23817-23828 (2025). "Asymmetric porous catalyst structures for low temperature photocatalytic dry reforming of methane"
DOI:10.1021/acsnano.5c04286
AI-Generated Summary:This study focuses on the importance of high-surface-area semiconductor supports in the photocatalytic dry reforming of methane (DRM). This research demonstrates that the structural design of the support is crucial in the photocatalytic DRM process, which converts greenhouse gases methane and CO₂ into valuable synthesis gas. In particular, high-surface-area supports with asymmetric pore structures hold the potential to dramatically improve catalytic performance and are expected to contribute to future technological development.
Farahdiana Wan Yunus, Moataz Mekawy, Edhuan Ismail, Jin Kawakita, Izumi Ichinose, SENSORS AND ACTUATORS B-CHEMICAL 442, 138077-1-138077-10 (2025). "Direct monitoring of individual ammonia or volatile fatty acids using a temperature-controlled galvanic sensor chip"
DOI:10.1016/j.snb.2025.138077
AI-Generated Summary:In this study, a newly developed moisture sensor chip (MSC) was utilized for the detection of ammonia (NH₃) and volatile fatty acids (VFAs), which are important in livestock management and biogas production. This temperature-controlled MSC is applicable for the detection of NH₃ under basic conditions and VFAs under acidic conditions.
Koichi Matsumoto, Hironori Hasegawa, Masaki Horie, Hideaki Kitazawa, Akiko T. Saito, Takenori Numazawa, CRYOGENICS 146, 104020-1-104020-8 (2025). "Thermal and electrical conductivity of magnetic refrigerant holmium diboride for magnetic refrigerator application"
DOI:10.1016/j.cryogenics.2024.104020
AI-Generated Summary:In this study, we evaluated the thermal and electrical conductivity of polycrystalline HoB₂ in magnetic fields and zero magnetic field, which are essential for improving the performance of magnetic refrigerators. The results strongly suggest that HoB₂ is an excellent magnetocaloric material for use in the low-temperature stages of hydrogen liquefaction.
Kazuki Yamane, Ryo Matsumoto, Takafumi D Yamamoto, Kensei Terashima, Shintaro Adachi, Hiroyuki Takeya, Mitsuharu Nagasawa, Yoshihiko Takano, SUPERCONDUCTOR SCIENCE & TECHNOLOGY 38, 035020-1-035020-7 (2025). "High-pressure effects on the crystal structure and critical temperature in superconducting NbB2 and stabilized MoB2"
DOI:10.1088/1361-6668/adb6f8
AI-Generated Summary:In this study, we focused on the relationship between the lattice parameter ratio (c/a), which plays a crucial role in superconductivity in MgB₂, and Tc, and investigated the correlation between Tc and c/a in superconducting diborides based on NbB₂ and MoB₂. As a result, a common positive correlation between Tc and c/a was observed in NbB₂, Zr-stabilized MoB₂, and their defect systems. This finding suggests a new direction for the development of superconducting metal diborides.
S. Ooi, M. Tachiki, T. Mochiku, H. Ito, T. Kubo, A. Kikuchi, S. Arisawa, K. Umemori, PHYSICAL REVIEW B 111, 094519-1-094519-7 (2025). "Dynamical visualization of attractively interacting single vortices in type-II/1 superconducting Nb by magneto-optical imaging"
DOI:10.1103/PhysRevB.111.094519
AI-Generated Summary:In this study, we focused on the vortex-vortex interaction in a Type II/1 superconductor by in situ magnetic-optical imaging using high-purity Nb, and observed its dynamic behavior with single-vortex resolution. As a result, we evaluated the transition temperature, which is the boundary between the Type II/2 and Type II/1 states, from the direct observation of clustering vortices. These diverse vortex configurations were suggested to arise from the interplay of vortex-vortex interactions, screening currents, and the pinning potential landscape.
Satoshi Ishii, Anjaneyulu Oruganti, Ilario Bisignano, Hideki Abe, ACS Applied Optical Materials 3, 313-318 (2025). "Fabricating Metallic–Dielectric Zirconium Nitride Thin Films for Photoelectric Conversion"
DOI:10.1021/acsaom.4c00453
AI-Generated Summary:In this study, we constructed a metal-dielectric interface composed of metallic zirconium nitride (ZrN) and dielectric zirconium nitride (Zr₃N₄) by controlling the flow rates of argon and nitrogen. We fabricated a metal-insulator-metal structure using this Zr-N thin film and confirmed its photoresponse. Furthermore, by forming plasmonic nanostructures on the Zr-N thin film, an improvement in photoresponse can be expected. Other transition metal nitrides can also be considered as candidates for realizing similar metal-dielectric components.
Lingrui Chu, Rang Li, Han Zhu, Weijie Liu, Hiroshi Amekura, Norito Ishikawa, Nariaki Okubo, Xiaoli Sun, Feng Chen, APPLIED PHYSICS LETTERS 127, 023101-1-023101-7 (2025). "Tailored silver nanoparticle arrays for enhanced polarization-anisotropic second-harmonic emission"
DOI:10.1063/5.0263702
AI-Generated Summary:In this study, we demonstrated second-harmonic generation (SHG) phenomena exhibiting remarkable polarization anisotropy using silver (Ag) nanoparticle (NP) arrays. The unique polarization-dependent nonlinearity shown by the results is expected to be applied to integrated nonlinear photonic devices that utilize polarization functions.
Hiroshi SAKUMA, Shigeru SUEHARA, Hidenobu NAKAO, Je-Deok KIM, Kenji TAMURA, Journal of Mineralogical and Petrological Sciences 120, 240819-1-240819-14 (2025). "Synthesis of needle-like aragonite using carbonation method: A review"
DOI:10.2465/jmps.240819
AI-Generated Summary:This study outlines the development of efficient synthesis conditions for needle-like aragonite (a polymorph of calcium carbonate crystals) using gaseous CO₂ and methods for precisely controlling its morphology. The research revealed that the estimated elastic modulus anisotropy of aragonite varies with crystal orientation. This suggests the importance of controlling crystal growth along the long axis of the rough surface for utilizing aragonite as a novel reinforcing material.
Taku T. Suzuki, JOURNAL OF MASS SPECTROMETRY 60, e5107-1-e5107-7 (2025). "Cryogenic TOF-SIMS around sublimation temperature of quench condensed-noble gas (Ne, Ar, and Kr) films"
DOI:10.1002/jms.5107
AI-Generated Summary:In this study, we demonstrated the possibility of TOF-SIMS analysis of surface phase transitions in quench-condensed rare gas films using a newly developed cryogenic TOF-SIMS. The results showed that cryogenic TOF-SIMS is effective for analyzing surface phase transitions in local regions defined by the incident ion beam.
Hideki Tanaka, Motomune Kodama, Takaaki Suzuki, Hiroshi Kotaki, Gen Nishijima, Akiyoshi Matsumoto, Michinaka Sugano, SUPERCONDUCTOR SCIENCE & TECHNOLOGY 38, 015019-1-015019-8 (2025). "Examination of factors affecting strain tolerance of multifilament MgB2 wires with Fe barrier"
DOI:10.1088/1361-6668/ad977b
AI-Generated Summary:This study focuses on the strain tolerance of sintered MgB₂ wires in the manufacturing of MgB₂ magnets, particularly in the "reaction and wind" method. This research revealed that residual strain due to differences in thermal expansion coefficients, the influence of yield materials, and the mechanical strength of the MgB₂ filaments themselves are important factors in understanding the strain tolerance of MgB₂ wires. These findings will contribute to the development of manufacturing processes for higher-performance and more durable MgB₂ magnets.
Yusuke Kimura, Yuki Emori, Hiroshi Miyazaki, Kyohei Natsume, Koji Kamiya, Gen Nishijima, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 35, 4900305-1-4900305-5 (2025). "Electromagnetic Analysis Evaluation of Split NbTi Superconducting Magnet for Scaled-up Active Magnetic Regenerative Refrigeration System"
DOI:10.1109/TASC.2024.3512515
AI-Generated Summary:In this study, we developed prototype 2, a scaled-up version, to increase the amount of liquefied hydrogen. The improved electrical design demonstrated that the scaled-up magnetic refrigeration system can operate without electromagnetic challenges such as magnetic force, induced voltage, and AC loss.
Miao Wang, Ken Sakaushi, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 64, e202419823-1-e202419823-6 (2025). "Deciphering pH Mismatching at the Electrified Electrode–Electrolyte Interface towards Understanding Intrinsic Water Molecule Oxidation Kinetics"
DOI:10.1002/anie.202419823
AI-Generated Summary:In this study, we elucidated the significant discrepancy effect of local pH between the electrode surface and the bulk electrolyte, taking the oxygen evolution reaction (OER) via water molecule oxidation using an iridium dioxide electrode catalyst as an example. This study accelerates the understanding of local proton-induced effects in electrode interface processes and the development of advanced electrochemical activity.
Yen-Ju Wu, Yibin Xu, Lei Fang, Wenqin Peng, Ken Sakaushi, Meiqi Zhang, Masao Arai, Yukinori Koyama, SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS-METHODS 5, 2513218-1-2513218-14 (2025). "Periodic table-based compositional descriptors for accelerating electrochemical material discovery: Li-ion conductors and oxygen evolution electrocatalysts"
DOI:10.1080/27660400.2025.2513218
AI-Generated Summary:In this study, we developed a periodic table-based composition descriptor that only requires chemical formulas. This periodic descriptor-based approach provides a scalable and efficient framework for the discovery of green energy materials such as next-generation batteries and hydrogen production, contributing to the achievement of carbon neutrality.
G. Campi, G. Tomassucci, M. Tanaka, H. Takeya, Y. Takano, T. Mizokawa, N. L. Saini, CHEMPHYSCHEM 26, e202400363-1-e202400363-7 (2025). "Microstructure Morphology of Chemical and Structural Phase Separation in Thermally Treated KxFe2-ySe2 Superconductor"
DOI:10.1002/cphc.202400363
AI-Generated Summary:In this study, we visualized the percolation and coupled chemical phase separation of KxFe₂-ySe₂ subjected to two different heat treatments, rapid quenching and slow cooling, using scanning X-ray microfluorescence. These results provide a quantitative characterization of the microstructural morphology of KxFe₂-ySe₂ and suggest the possibility of designing electronic devices utilizing sub-micron scale chemical phase separation.
Miao Wang, Akimitsu Ishii, Ken Sakaushi, ACS Energy Letters 10, 22-29 (2025). "Accelerated Electrocatalyst Degradation Testing by Accurate and Robust Forecasting of Multidimensional Kinetic Model with Bayesian Data Assimilation"
DOI:10.1021/acsenergylett.4c02868
AI-Generated Summary:In this study, we propose a multidimensional kinetic model incorporating Bayesian data assimilation, inspired by weather forecasting techniques. This data-driven approach is expected to deepen the understanding of microscopic electrochemical mechanisms and accelerate the development of next-generation energy technologies.
Yasuaki Takeda, Gen Nishijima, Hitoshi Kitaguchi, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 35, 6604106-1-6604106-6 (2025). "Resistance and Voltage–Current Characteristics of REBCO Superconducting Joint"
DOI:10.1109/TASC.2025.3550140
AI-Generated Summary:In this study, we discuss the resistance and voltage-current (V-I) characteristics of rare-earth-based copper oxide (REBCO) intermediate growth superconducting (iGS) joints based on current decay measurements of REBCO closed loops. The results show that the temperature and magnetic field dependence of the n-value of iGS joints by the empirical power law model is similar to that of REBCO tapes.
H. Amekura, K. Narumi, A. Chiba, Y. Hirano, K. Yamada, S. Yamamoto, Y. Saitoh, Materialia 39, 102317-1-102317-9 (2025). "An extraordinarily low-energy threshold of less than 60 keV for ion track formation in silicon"
DOI:10.1016/j.mtla.2024.102317
AI-Generated Summary:In this study, we focused on the phenomenon that the impact of C₆₀ cluster ions on solids can simultaneously inject 60 carbon atoms of molecular size with spatiotemporal correlation, and investigated the mechanism of ion track formation, which differs from conventional atomic ion irradiation. As a result, it was shown that the formation of ion tracks by C₆₀ cluster ion irradiation is based on a unique mechanism different from that of atomic ion irradiation.
Naoaki Kuwata, Gen Hasegawa, Sihao Xing, Kenjiro Hashi, Yoshitaka Matsushita, Randy Jalem, Kazunori Takada, Hitoshi Onodera, Shuhei Yoshida, SOLID STATE IONICS 428, 116924-1-116924-8 (2025). "Fast lithium-ion diffusion in pyrochlore-type oxyfluoride Li1.25La0.58Nb2O6F"
DOI:10.1016/j.ssi.2025.116924
AI-Generated Summary:In this study, we elucidated the fast Li⁺ ion diffusion mechanism in pyrochlore-type lithium lanthanum niobate oxyfluoride,Li₂–xLa(₁+x)/₃□(₂x–₁)/₃Nb₂O₆F(□ = vacancy), a fast lithium-ion conductor with an oxide framework, using pulsed field gradient NMR and impedance measurements. The insights gained from this study on the fast Li⁺ ion diffusion mechanism in pyrochlore-type oxyfluorides represent a significant step towards the development of novel solid electrolytes with superior performance compared to conventional solid electrolytes. This will serve as a foundational technology for the realization of high-performance all-solid-state secondary batteries.
Yuki Nomura, Kazuo Yamamoto, Naoaki Kuwata, Tsukasa Hirayama, ACS ENERGY LETTERS 10, 1404-1410 (2025). "Imaging Phase Boundary Kinetics in Lithium Titanate Using Operando Electron Energy-Loss Spectroscopy"
DOI:10.1021/acsenergylett.5c00209
AI-Generated Summary:In this study, we visualized the phase boundary migration dynamics of lithium titanate using operando scanning transmission electron microscopy and electron energy loss spectroscopy. The results suggested that the high-rate discharge performance of lithium titanate is attributed to a relatively low activation energy of 0.49 eV.
Makoto Aoki, Tamao Shishido, Tetsuro Morooka, Takuya Nakanishi, Takuya Masuda, JOURNAL OF PHYSICAL CHEMISTRY C 129, 2122-2131 (2025). "Electrochemical Oxidative Desorption of Adsorbed Sulfur Species on (111) Surfaces of Single Crystals of Pure Pt and Pt-Based Bimetallic Alloys"
DOI:10.1021/acs.jpcc.4c06652
AI-Generated Summary:In this study, we investigated the adsorption and desorption behavior of sulfur species on pure Pt(111) and Pt₃M(111) (M = Co, Cu, Fe, Pd) binary alloy surfaces using electrochemical measurements and X-ray photoelectron spectroscopy (XPS). This research aims to deepen the understanding of sulfur poisoning mechanisms on Pt-based alloy surfaces and provide new guidelines for catalyst design.
Shuyu Dong, Yiyi Zheng, Qiaohui Duan, Yu Zhao, Tian Tan, Yu Zhou, Tian Rao, Hanbing Yan, Weiqian Guo, Denis Y. W. Yu, JOURNAL OF MATERIALS CHEMISTRY A 13, 9453-9461 (2025). "Surface-modified BaTiO3 as functional filler in poly(ethylene oxide)-based solid polymer electrolyte for lithium-metal battery"
DOI:10.1039/D5TA00072F
AI-Generated Summary:In this study, barium titanate nanoparticles coated with 3-(triethoxysilyl)propionitrile (BTO@TESPN) were introduced as solid fillers to overcome the challenges of ionic conductivity and mechanical strength in polyethylene oxide (PEO)-based polymer electrolytes. This research proposes an innovative approach to enhance PEO-based solid polymer electrolytes by tailoring the interface between the fillers and the polymer matrix.
K. Niitsu, F. Ichihara, S. Miyoshi, M. Ode, K. Mitsuishi, T. Masuda, K. Takada , SOLID STATE IONICS 421, 116804-1-116804-10 (2025). "Structural analysis of the LiCoO2 cathodes/garnet-type Li6.5La3Zr1.5Ta0.5O12 solid electrolyte interface"
DOI:10.1016/j.ssi.2025.116804
AI-Generated Summary:In this study, we investigated the sinterability of an oxide cathode, LiCoO₂, and a garnet-type solid electrolyte, Li₇-xLa₃Zr₂-xTaxO₁₂ (x = 0.5), at 980°C and 1080°C using an integrated approach combining scanning transmission electron microscopy and spectroscopic techniques, with a particular focus on the LiCoO₂/Li₇-xLa₃Zr₂-xTaxO₁₂ interface. Our results revealed, through analysis by energy-dispersive X-ray spectroscopy and electron energy loss spectroscopy, that the disordered LiCoO₂ interfacial phase is slightly depleted of Li and contaminated with La, Zr, and Ta.
Feye-Feng Lu, Huu Duc Luong, Seong-Hoon Jang, Randy Jalem, Yoshitaka Tateyama, Hong-Kang Tian, JOURNAL OF POWER SOURCES 628, 235906-1-235906-10 (2025). "Dual influence of protonation on Li-ion transport in garnet solid electrolytes: A first-principles study"
DOI:10.1016/j.jpowsour.2024.235906
AI-Generated Summary:In this study, we investigated the effects of protonation on the structure, lithium-ion transport, and proton dynamics of LLZO using density functional theory (DFT) and DFT-based molecular dynamics (DFT-MD) simulations. Our results highlight the importance of understanding and controlling protonation effects for enhancing the performance of LLZO as a solid electrolyte.
Yueying Peng, Kei Nishikawa, Cell Reports Physical Science 6, 102439-1-102439-15 (2025). "Three-dimensional imaging of the microstructure of lithium metal anode using Xenon plasma focused ion beam"
DOI:10.1016/j.xcrp.2025.102439
AI-Generated Summary:In this study, we successfully reconstructed the 3D microstructure of electrodeposited lithium at a high resolution of 50 nm per pixel and on a large scale (200 μm) using Xe plasma focused ion beam scanning electron microscopy (FIB-SEM). This technique deepens our understanding of the relationship between the 3D microstructure of electrodeposited lithium, which is essential for the advancement of lithium metal batteries, and battery performance, and provides an innovative method for electrode evaluation and optimization.
Marcela Calpa, Kei Kubota, Jittraporn Saengkaew, Shoichi Matsuda, Kazunori Takada, JOURNAL OF POWER SOURCES 634, 236473-1-236473-8 (2025). "The Role of Grain Boundaries in Suppressing Particle Fracture in Li-Rich Layered Oxide Cathode Materials"
DOI:10.1016/j.jpowsour.2025.236473
AI-Generated Summary:In this study, we discovered that by combining polycrystallinity and reduced particle/crystallite size using Li₂RuO₃ as a model, the fracture resistance was improved. As a result, the capacity retention of Li₂RuO₃ after 50 cycles improved from 67% to 95%.
Majid Ghanimati, Mohsen Lashgari, Masaki Takeguchi, Fabio Montagnaro, Marco Balsamo, INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 105, 1217-1229 (2025). "Highly adsorptive/effective rGO/pn-junction nanocomposite to generate hydrogen fuel using H2S: Rational photocatalyst design and magnetic boosting"
DOI:10.1016/j.ijhydene.2025.01.278
AI-Generated Summary:In this study, we propose an energy-efficient alternative process for converting hydrogen sulfide (H₂S), which is abundantly generated in the oil/gas industry, into hydrogen fuel in an environmentally friendly manner. As a result, it is suggested that the magnetic field induction effect, by enhancing the magnetism of the nanocomposite through the introduction of rGO and strengthening the interaction with the external magnetic field, may have contributed to the efficient separation and reuse of the photocatalyst, or the stabilization of reaction intermediates.
Nithya Hellar, Yoshiki Iwai, Masato Ohzu, Sebastian Brox, Arunkumar Dorai, Reiji Takekawa, Naoaki Kuwata, Junichi Kawamura, Martin Winter, Communications Materials 6, 1-7 (2025). "Direct observation of Mn-ion dissolution from LiMn2O4 lithium battery cathode to electrolyte"
DOI:10.1038/s43246-025-00733-2
AI-Generated Summary:In this study, we established in-situ ¹H nuclear magnetic resonance imaging (MRI) as an efficient technique for observing Mn²⁺ dissolution in model lithium batteries with LMO cathodes. The method developed in this study is expected to resolve the long-standing question of "when, where, and how" metal ion dissolution occurs in lithium-ion battery electrodes and can be applied to other electrochemical systems.
Kaiming Xue, Qiaohui Duan, Kotaro Imaizumi, Hongfei Li, Denis Y.W. Yu, ELECTROCHIMICA ACTA 514, 145690-1-145690-8 (2025). "Improving reversibility and reducing overpotential of Cu–Zn battery with electrolyte engineering and cation-selective membrane"
DOI:10.1016/j.electacta.2025.145690
AI-Generated Summary:In this study, we solved the challenges of conventional non-rechargeable Cu-Zn batteries to enhance their appeal as an alternative battery system of copper-zinc (Cu-Zn) batteries, which can use inexpensive and non-toxic raw materials. As a result, it was shown that Cu-Zn batteries have the potential to be practical secondary batteries.
Yimeng Wu, Jie Tang, Shuai Tang, You-Hu Chen,Ta-Wei Chiu, Masaki Takeguchi, Ayako Hashimoto, Lu-Chang Qin, Nanomaterials 15, 93-1-93-10 (2025). "Stable Field Emissions from Zirconium Carbide Nanoneedle Electron Source"
DOI:10.3390/nano15020093
AI-Generated Summary:In this study, we fabricated a single zirconium carbide (ZrC) nanoneedle structure oriented in the <100> direction using a dual-beam FIB-SEM system and evaluated its field emission properties and emission current stability. This work presents an efficient and controllable method for nanostructure fabrication, which can be applied to transition metal compounds like ZrC for field emission emitters, demonstrating its potential as an electron source for electron beam devices.
Reona Iimura, Shiori Kawasaki, Takashi Yabu, Shinnosuke Tachibana, Kazuya Yamaguchi, Toshihiko Mandai, Kazuaki Kisu, Naoto Kitamura, Zhirong Zhao-Karger, Shin-ichi Orimo, Yasushi Idemoto, Masaki Matsui, Maximilian Fichtner, Itaru Honma, Tetsu Ichitsubo, Hiroaki Kobayashi, Small 21, 2411493-1-2411493-10 (2025). "Ultrasmall α‐MnO2 with Low Aspect Ratio: Applications to Electrochemical Multivalent‐Ion Intercalation Hosts and Aerobic Oxidation Catalysts"
DOI:10.1002/smll.202411493
AI-Generated Summary:In this study, we synthesized ultrasmall (<10 nm) α-MnO₂ particles with a low aspect ratio (c/a ≈ 2) using a novel alcohol solution process. The results demonstrated that the high versatility of these ultrasmall α-MnO₂ holds the potential to revolutionize energy storage and catalysis in next-generation green energy technologies.
V. Wang, J.B. Lin, E.Z. Liang, T. Ohno, J. Nara, W.T. Geng, PHYSICA B-CONDENSED MATTER 699, 416873-1-416873-6 (2025). "Effect of direct interlayer coupling on the moiré potentials in twisted WSe2/MoSe2 heterobilayers"
DOI:10.1016/j.physb.2024.416873
AI-Generated Summary:In this study, we analyzed unstrained rigid-twist Wse₂/MoSe₂ bilayer structures using DFT and discovered that direct interlayer coupling induces a significant moiré potential. Consequently, the pronounced spatial variation in interlayer coupling strength was attributed to intra-layer charge redistribution, suggesting its crucial role in moiré potential formation.
Shinichi Takeno, Taiki Suematsu, Ryusei Kunisaki, Gen Hasegawa, Ken Watanabe, Naoaki Kuwata, Kazutaka Mitsuishi, Tsuyoshi Ohnishi, Kazunori Takada, Kohichi Suematsu, Kengo Shimanoe, Journal of Materials Chemistry A 13, 2943-2949 (2025). "New insight into designing a thick-sintered cathode for Li-ion batteries: the impact of excess lithium in LiCoO2 on its electrode performance"
DOI:10.1039/d4ta07377k
AI-Generated Summary:In this study, we focus on LiCoO₂, a positive electrode active material, aiming to improve the characteristics of high-capacity electrodes using active material sintered disks. As a result of investigating the effect of excess lithium (Li), it was found that the c-axis orientation of the sintered disk decreases with increasing Li. Furthermore, ⁷Li-MAS-NMR analysis suggested the presence of Li-induced defects when the excess Li amount exceeds 5.1%.
Dhruba B. Khadka, Yasuhiro Shirai, Ryoji Sahara, Masatoshi Yanagida, Kenjiro Miyano, Small 21, 2410048-1-2410048-10 (2025). "Ameliorating Defects in Wide Bandgap Tin Perovskite Solar Cells Using Fluorinated Solvent and Hydrazide"
DOI:10.1002/smll.202410048
AI-Generated SummaryIn this study, the introduction of 4-fluorobenzhydrazide (F-BHZ) to wide bandgap perovskite solar cells (PSCs) fabricated with tin perovskites (WB-Sn-HP) has been reported to improve performance and stability through surface passivation. This research demonstrates the potential of chemical engineering to enhance the device performance and stability of WB-Sn-PSCs by utilizing a multifunctional passivation molecule (F-BHZ), presenting a promising approach for future PSC development.:
Gerson Mette, Kunie Ishioka, Steven Youngkin, Wolfgang Stolz, Kerstin Volz, Ulrich Höfer, Advanced Materials Interfaces 12, 2400573-1-2400573-6 (2025). "Interface-Specific Excitation of Coherent Phonons at the Buried GaP/Si(001) Heterointerface"
DOI:10.1002/admi.202400573
AI-Generated Summary:In this study, we investigated the ultrafast charge carrier and phonon dynamics at the embedded heterointerface of GaP/Si(001) using two-color pump-probe reflectivity measurements. This research deepens the understanding of photoinduced dynamics and phonon properties at the GaP/Si heterointerface.
Dhruba B. Khadka, Masatoshi Yanagida, Yasuhiro Shirai, SOLAR ENERGY MATERIALS AND SOLAR CELLS 281, 113319-1-113319-8 (2025). "Assessing degradation in perovskite solar cells via thermal hysteresis of photocurrent and device simulation"
DOI:10.1016/j.solmat.2024.113319
AI-Generated Summary:In this study, we investigated the thermal hysteresis of photocurrent (THPC) and the dynamics of thermally activated ionic or recombination processes. This work highlights a direct correlation between PSC degradation and thermally activated traps and interfacial charge accumulation, suggesting that passivation of these pathways is crucial for improving device stability.
Takatsugu Wakahara, Chika Hirata, Dorra Mahdaoui, Kazuko Fujii, Yoshitaka Matsushita, Osamu Ito, Makito Takagi, Tomomi Shimazaki, Masanori Tachikawa, Shinjiro Yagyu, Yubin Liu, Yoshiyuki Nakajima, Takuro Nagai, Kazuhito Tsukagoshi, CARBON 233, 119838-1-119838-8 (2025). "One-dimensional C60 Arrays in Noncovalent Benzidine Networks"
DOI:10.1016/j.carbon.2024.119838
AI-Generated Summary:In this study, we synthesized single-layer nanosheets with novel one-dimensional orientation structures in the solid state for fullerene (C₆₀), which normally takes a face-centered cubic lattice structure. These C₆₀/TPB nanosheets exhibit characteristic absorption bands in the near-infrared region, suggesting the occurrence of charge transfer interactions between C₆₀ and the TPB framework within the cocrystal.
Daisuke Shibata , Toshiaki Ohta, Yuki Orikasa, Kimihiko Ito, Kiyotaka Asakura, e-Journal of Surface Science and Nanotechnology 23, 36-43 (2025). "A Voxel Method for Correcting the Self-absorption Effect in Fluorescence X-ray Absorption Fine Structure Spectra"
DOI:10.1380/ejssnt.2025-010
AI-Generated Summary:This study proposes the voxel method to address the issue of self-absorption effects in partial fluorescence yield X-ray absorption fine structure (PFY-XAFS) spectroscopy in the soft X-ray region. In this study, we compare and analyze the O K-edge PFY-XAFS spectra of a CoO single crystal, a Li₂CO₃ thin film on a NiO substrate, and a CoO powder sample to verify the validity, advantages, and limitations of the voxel method.
Masanao Ishijima, Arisa Omata, Kiyoshi Kanamura, Toshihiko Mandai, Xiatong Ye, Tetsu Ichitsubo, Koichi Kajihara, RSC Applied Interfaces 2, 179-184 (2025). "Oxalate-assisted Fe2O3 surface functionalization of nanosized MgMn2O4 and α-MnO2 cathodes for rechargeable magnesium batteries"
DOI:10.1039/d4lf00290c
AI-Generated Summary:In this study, we utilized the strong ability of oxalate ions to bridge transition metal ions to form a thin and uniform Fe₂O₃ layer on MgMn₂O₄ and α-MnO₂ nanoparticles. As a result, the obtained Fe₂O₃ layer effectively suppressed side reactions during the insertion and extraction of Mg²⁺ ions, thereby improving the capacity retention and cycling performance.
Kazutaka Mitsuishi, Fumiaki Ichihashi, Yoshio Takahashi, Katsuaki Nakazawa, Masaki Takeguchi, Ayako Hashimoto, Toshiaki Tanigaki, MICROSCOPY 74, 92-97 (2025). "Resolution improvement of differential phase-contrast microscopy via tilt-series acquisition for environmental cell application"
DOI:10.1093/jmicro/dfae049
AI-Generated Summary:In this study, we developed a simple method to improve the resolution of phase measurement in differential phase contrast scanning transmission electron microscopy (STEM) using a sealed environmental cell and verified it using a model sample that simulated environmental cell observation. The results showed that using the proposed method, a phase accuracy of 2π/100 rad can be achieved for samples in an environmental cell.
Kosuke Kawai, Seong-Hoon Jang, Yuta Igarashi, Koji Yazawa, Kazuma Gotoh, Jun Kikkawa, Atsuo Yamada, Yoshitaka Tateyama, Masashi Okubo, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 64, e202410971-1-e202410971-8 (2025). "Proton Intercalation into an Open-Tunnel Bronze Phase with Near-Zero Volume Change"
DOI:10.1002/anie.202410971
AI-Generated Summary:This study proposes aqueous proton batteries as an alternative technology to manage the safety and supply chain risks associated with lithium-ion batteries (LIBs), which are an urgent issue in sustainable development. The results demonstrated the importance of incorporating strain-relief voids into the host material to reduce volume changes during charging and discharging.
Hong Pang, Cédric Bourgès, Naohito Tsujii, Jha Rajveer, Naoyuki Kawamoto, Fumihiko Ichihara, Takahiro Baba, Tetsuya Baba, Naoki Sato, Yuichi Yamasaki, Takao Mori, ACS Materials Letters 7, 715-723 (2025). "Zinc Stabilized Chalcopyrite Thin Film for Enhanced Thermoelectric Power Generation Near Room Temperature"
DOI:10.1021/acsmaterialslett.4c01898
AI-Generated Summary:This study revealed that zinc (Zn) promotes the ordering of cations in copper iron sulfide (CuFeS₂) thin films, preventing the reverse transition to the wurtzite structure at high temperatures and stabilizing the chalcopyrite structure. As a result, a detailed understanding of cation ordering and phase transitions between CuFeS₂ polymorphs is expected to contribute to the manufacturing processes of multicomponent sulfide thin films and the improvement of efficiency in renewable energy devices.
Akihiro Nomura, Shota Azuma, Fumisato Ozawa, Morihiro Saito, JOURNAL OF POWER SOURCES 633, 236426-1-236426-13 (2025). "Highly porous carbon nanotube air-electrode combined with low-viscosity amide-based electrolyte enabling high-power, high-energy lithium-air batteries"
DOI:10.1016/j.jpowsour.2025.236426
AI-Generated Summary:In this study, we propose an innovative approach to overcome the practical challenge of low rate capability in lithium-air batteries (LABs) by combining a highly porous carbon nanotube (CNT) air electrode with a low-viscosity amide-based electrolyte. As a result, high-power and high-energy-density LABs are expected to contribute to the development of ultra-lightweight aircraft batteries.
Fumisato Ozawa, Yusuke Himata, Hikaru Enomoto, Shota Azuma, Akihiro Nomura, Morihiro Saito, ACS APPLIED ENERGY MATERIALS 8, 4370-4378 (2025). "Correlations between Li-Ion Concentration, Solvation Structure, and Equilibrium Potential of Li-Naphthalenide Solutions for Li Alloying of Si Negative Electrode of Next-Generation Batteries"
DOI:10.1021/acsaem.4c03286
AI-Generated Summary:In this study, we prepared a Li–naphthalene (Li–NTL) solution using Li foil, naphthalene, and 2-methyltetrahydrofuran as a solvent, and investigated the effect of Li concentration on the Li alloying behavior of Si anodes. Our findings revealed that the Li concentration in the Li–NTL solution plays a crucial role in controlling the amount of dianions and determining the depth of Li alloying in Si anodes.
Katsunori Tagami, Takahisa Ohno, Jun Nara, Mamoru Usami, JAPANESE JOURNAL OF APPLIED PHYSICS63,023001-1-023001-6(2024). "Magnetic structures and magnetic anisotropy of Mn3−xFexSn studied by first-principles calculations"
DOI:10.35848/1347-4065/ad2303
AI-Generated Summary:In this study, we theoretically investigated the structure and magnetic anisotropy of Kagome lattice Mn₃−xFexSn crystals over a wide range of x using first-principles calculations, clarified the lattice constants and bond lengths in six magnetic phases and their x-dependence, and discussed their stability. As a result, it provides important insights into understanding the magnetic properties of Kagome lattice Mn₃−xFexSn crystals.
Shoichi Matsuda, ChemElectroChem11,e202300605-1-e202300605-8(2024). "New Insights into Fundamental Processes and Physical Degradation Mechanisms in Rechargeable Lithium-Oxygen Batteries Providing Suitably High Energy Densities"
DOI:10.1002/celc.202300605
AI-Generated Summary:This study emphasizes the importance of exploring new technologies, such as gas diffusion layers and lightweight protective films for lithium metal electrodes, as an approach towards realizing LOBs with practical energy densities. It is believed that the topics presented in this study will promote new research directions in the future development of high-energy-density and long-life LOBs.
Esmail Doustkhah, Nao Tsunoji, Shinya Mine, Takashi Toyao, Ken-ichi Shimizu, Tetsuro Morooka, Takuya Masuda, M. Hussein N. Assadi, Yusuke Ide, ACS Applied Materials & Interfaces16,10251-10259(2024). "Feeble Single-Atom Pd Catalysts for H2 Production from Formic Acid"
DOI:10.1021/acsami.3c18709
AI-Generated Summary:In this study, we demonstrated that single-atom palladium (PdSA) is not necessarily catalytically ideal for the hydrogen evolution reaction from formic acid. The results showed that the suitability of single-atom catalysts is highly dependent on their interaction with the support.
Xin Zhao, Wan-Peng Li, Yanhui Cao, Arsenii Portniagin, Bing Tang, Shixun Wang,Qi Liu, Denis Y. W. Yu, Xiaoyan Zhong, Xuerong Zheng, Andrey L. Rogach, ACS Nano18,4256-4268(2024). "Dual-Atom Co/Ni Electrocatalyst Anchored at the Surface-Modified Ti3C2Tx MXene Enables Efficient Hydrogen and Oxygen Evolution Reactions"
DOI:10.1021/acsnano.3c09639
AI-Generated Summary:In this study, we demonstrated that diatomic catalytic sites constructed on conductive substrates offer a promising opportunity to accelerate the kinetics of the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). This work provides guidance for constructing diatomic active metal sites on MXene substrates to synergistically enhance the electrochemical efficiency and stability of energy conversion and storage systems.
Shoichi Matsuda, Eiki Yasukawa, Shin Kimura, Shoji Yamaguchiab, Kohei Uosaki, FARADAY DISCUSSIONS248,341-354(2024). "Evaluation of performance metrics for high energy density rechargeable lithium–oxygen batteries"
DOI:10.1039/D3FD00082F
AI-Generated Summary:In this study, we fabricated a stacked cell configuration of LOB and evaluated its performance under different experimental conditions, thereby elucidating the unique degradation phenomena under lean-electrolyte and high areal capacity conditions. The results obtained in this study indicate that the amount of electrolyte, areal capacity, and gas diffusion layer material are important factors in evaluating performance indicators such as the cycle life and round-trip energy efficiency of LOB.
Dhruba B. Khadka, Yasuhiro Shirai, Masatoshi Yanagida, Hitoshi Ota, Andrey Lyalin, Tetsuya Taketsugu, Kenjiro Miyano , Nature Communications15,882-1-882-16(2024). "Defect passivation in methylammonium/bromine free inverted perovskite solar cells using charge-modulated molecular bonding"
DOI:10.1038/s41467-024-45228-9
AI-Generated Summary:In this study, we investigated the effect of diammonium molecules with aryl or alkyl backbones as a molecular passivation method to improve the performance and operational stability of halide perovskite solar cells (HPSCs), applied to methylammonium-free perovskites. This work highlights the crucial role of bifunctional molecules with stronger surface adsorption capabilities in defect reduction, providing a foundation for designing charge-controlling molecular passivation to enhance the performance and stability of HPSCs.
Itsuki Konuma, Naohiro Ikeda, Benoît D.L. Campéon, Hinata Fujimura, Jun Kikkawa, Huu Duc Luong, Yoshitaka Tateyama, Yosuke Ugata, Masao Yonemura, Toru Ishigaki, Taira Aida, Naoaki Yabuuchi, Energy Storage Materials66,103200-1-103200-11(2024). "Unified Understanding and Mitigation of Detrimental Phase Transition in Cobalt-free LiNiO2"
DOI:10.1016/j.ensm.2024.103200
AI-Generated Summary:In this study, we performed a detailed analysis of LiNiO₂ incorporating nano-sized Li₃PO₄ obtained from metastable and rocksalt LiNiO₂–Li₃PO₄ solid solutions, and considered the cause of phase transition of LiNiO₂. The unified understanding of the degradation mechanism of LiNiO₂ obtained in this study provides design criteria for Co-free and non-metal-substituted LiNiO₂, leading to the full utilization of the reversible capacity of layered materials.
Jittraporn Saengkaew, Emiko Mizukia, Shoichi Matsuda, Energy Advances3,248-254(2024). "Performance evaluation of lithium metal rechargeable batteries with a lithium excess cation-disordered rocksalt based positive electrode under high mass loading and lean electrolyte conditions"
DOI:10.1039/d3ya00281k
AI-Generated Summary:In this study, we evaluated the performance of Li₂RuO₃/Li₂SO₄ as a model disordered rock-salt (DRX) material under high energy density conditions at the cell level to reveal the true potential of promising cathode materials among lithium-excess DRX metal oxides. The results obtained in this study suggest that DRX-based cathode materials have the potential to exhibit excellent performance even under practical cell conditions.
Ridwan P. Putra, Kyosuke Matsushita, Tsuyoshi Ohnishi, Takuya Masuda, Journal of Physical Chemistry Letters15,490-498(2024). "Operando Nanomechanical Mapping of Amorphous Silicon Thin Film Electrodes in All-Solid-State Lithium-Ion Battery Configuration during Electrochemical Lithiation and Delithiation"
DOI:10.1021/acs.jpclett.3c03012
AI-Generated Summary:In this study, we constructed a bimodal atomic force microscopy system to evaluate the nanomechanical properties of amorphous Si thin films, which are electrode materials for lithium-ion secondary batteries, in an operando (in-situ) state during the electrochemical lithiation/delithiation process. This research revealed how the nanomechanical properties of Si electrodes change during the lithiation/delithiation process.
Toshihiko Mandai, Umi Tanaka, Mariko Watanabe, Energy Storage Materials67,103302-1-103302-10(2024). "Mg–Zn–Cl-integrated functional interface for enhancing the cycle life of Mg electrodes"
DOI:10.1016/j.ensm.2024.103302
AI-Generated Summary:In this study, surface engineering was employed to mitigate the passivation characteristics of the reductive Mg electrode. Among the artificial interfaces derived from various elements, the Mg-Zn-Cl integrated artificial interface, when combined with a halogen-free, weakly coordinating anion-based electrolyte, delivered superior Mg deposition-dissolution cycling performance. The technology developed in this study represents a highly significant yet underexplored research area in RMB chemistry, paving the way for the evaluation of interfacial behavior under harsh and electrolyte-scarce conditions.
