Physics of Energy Conversion and Storage, Physik-Department, Technische Universität München
Department of Applied Chemistry, Tokyo Denki University
Department of Chemistry and Life Science, Yokohama National University
Research Center for Advanced Measurement and Characterization, National Institute for Materials Science
Department of Applied Chemistry, Tokyo Denki University
Department of Chemistry and Life Science, Yokohama National University
Energy and Electronics Materials R&D Laboratories, Sumitomo Electric Industries, Ltd.
Energy and Electronics Materials R&D Laboratories, Sumitomo Electric Industries, Ltd.
Physics of Energy Conversion and Storage, Physik-Department, Technische Universität München
Department of Chemistry and Life Science, Yokohama National University & Advanced Chemical Energy Research Center, Yokohama National University & Elements Strategy Initiative for Catalysts and Batteries, Kyoto University
抄録
This study describes a high-energy and durable aqueous battery system with metastable and nanosized Mo-based oxides used as high-capacity negative electrodes. A wider electrochemical window is achieved with concentrated aqueous electrolytes through which highly reversible Li storage without the decomposition of water molecules is achieved for the Mo-based oxides. A full cell with an Mn-based oxide shows good capacity retention over 2,000 cycles. X-ray absorption spectroscopy reveals that the solid-state redox reaction of Mo ions reversibly proceeds in aqueous electrolytes for the metastable Mo oxide. This study opens a way to develop high-energy, durable, and safe batteries on the basis of metastable and nanosized oxides with aqueous electrolyte solutions.
雑誌名
Proceedings of the National Academy of Sciences of the United States of America
Nanosized and metastable molybdenum oxides as negative electrode materials for durable high-energy aqueous Li-ion batteries
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