Solid State Battery Ionics Group

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Group Website

The Solid-State Battery Ionics Group aims to develop safe and long-lasting solid-state batteries that contribute to achieving carbon neutrality by 2050. To this end, we investigate the mechanisms of ion transport inside solid electrolytes and across their interfaces, working to establish design principles grounded in fundamental science. In addition, we employ unique experimental approaches—such as NMR, TOF-SIMS, and operando analyses—to visualize ion dynamics, thereby driving the development of next-generation solid-state battery materials.

Time and spatial scales of lithium diffusion in solid-state batteries

Isotope diffusion and operando XRD analysis of battery materials

For the analysis of ion transport behavior, we are equipped with nuclear magnetic resonance (NMR), time-of-flight secondary ion mass spectrometry (TOF-SIMS), and impedance spectroscopy instruments. In addition, we have facilities for solid-state battery fabrication, including a pulsed laser deposition (PLD) system, glove boxes, and charge–discharge testing equipment.

• Enabling Observation of Fast-Moving Lithium Ions within Solid-State Batteries【NIMS NOW, 2024, 24 (1), 2024/3/7】
• Challenge to improve battery performance in a state-of-the-art environment【NIMS NOW, 2024, 24 (1), 2024/3/7】
• Imaging Grain Boundaries that Impede Lithium-Ion Migration in Solid-State Batteries 　—New technique developed to quantify ionic conductivity across grain boundaries—
• Hidden Cause of Lithium-Rich Cathode Materials’ Low Energy Efficiency Revealed 　—Asymmetric Reaction Pathways Are Key—

• Solid-State Battery Group
• Battery Materials Analysis Group
• Photovoltaic Materials Group
• Rechargeable Battery Materials Group
• Solid State Battery Ionics Group
• Environment-Controlled Microscopy Group
• Frontier Battery Materials Group
• Automated Electrochemical Experiments Team