96Amidst the exploration of clean energy source and energy storage device, biomass carbon material has emerged to be one promising candidate [1] owing to their unique combination of high surface area, well-defined porosity, and intrinsic conductivity, hence particularly fitted to energy storage devices such as supercapacitors and batteries [2]. By using nanoarchitectonics, biomass carbon could be designed and applied precisely at the nanoscale for novel performance possibilities of sustainable energy storage technologies. This work presents the synthesis of high surface area, hierarchically porous carbon from Terminalia bellirica (Barro) seeds, using KOH activation and carbonization at 700-900°C in nitrogen atmosphere (1:1 weight ratio). The carbon materials were characterized by various techniques, and their electrochemical performance was tested in a three-electrode cell with 1 M H2SO4, using Ag/AgCl as the reference and Pt-wire as the counter electrode. The XRD and Raman spectrum confirms the amorphous nature of prepared carbon materials, having ultra-high surface area of 2321.2 m2 g-1 that showed better electrochemical performance of 325.65 F g-1 at 1 A g-1 current density. Nanophase separation of metal-oxide nanocomposites (MONs) triggered by internal oxidation were explored both through numerical simulation and experimental. Multiple pattern trends from lamellae-pattern to maze-pattern obtained from simulation were compared to In-Situ Transmission Electrons Microscope images (In-situ TEM) of phase-separated bulk Pt-CeO2. [1, 2] In other experimental approach, Pt5Ce precursor nanoalloy with particle sizes approximately ~10 nm supported on graphene nanoplatelets were observed to formed a heterostructure of Pt-CeO2 with epitaxial interface upon internal oxidation of more oxyphilic species, Ce. Fast Fourier Transformation (FFT) patterns further confirmed Pt (110)//CeO2 (110) epitaxial interface relationship. Poster Award NomineeP5-31Biomass-derived Carbon Nanostructures for Energy Storage Technology Sarita Manandhar1, 2 and L. K. Shrestha1, 2 1 Research Center for Materials Nanoarchitectonics, National Institute for Materials Science (NIMS)2 Department of Materials Science, Institute of Pure and Applied Sciences, University of Tsukuba[1] J. Wang et. al., ACS Omega, 7 (26), 22689–22697 (2022). [2] R. G. Shrestha et. al., Nanomaterials, 10 (4), 639 (2020). wP5-32Poster Award NomineeOxidation-Triggered Nanophase Separation: Numerical Simulation and Experimental Study.Nasrat Hannah Shudin1,2, Ryuto Eguchi1,3, Ankit Singh1, Ayako Hashimoto1,3, and Hideki Abe1,21 Research Center for Energy and Environment Materials, National Institute for Materials Science (NIMS)2 Graduate School of Science and Engineering, Saitama University3 Graduate School of Science and Engineering, University of Tsukuba[1] N.H. Shudin, R. Eguchi, T. Fujita, T. Tokunaga, A. Hashimoto and H. Abe, Phys. Chem. Chem. Phys., 26, 14103-14107 (2024). [2] Y. Wen, H. Abe, K. Mitsuishi and A. Hashimoto, Nanoscale, 13, 18987-18995 (2021).
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