Construction of dual-carbon batteries based on their reaction potentials

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K14718
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 36020:Energy-related chemistry
• Research Institution: Kyoto University
• Principal Investigator: Yamamoto Takayuki 京都大学, エネルギー理工学研究所, 助教 (30783823)
• Project Period (FY): 2021-04-01 – 2023-03-31
• Keywords: 二次電池 / 炭素材料 / イオン液体

Outline of Final Research Achievements

In this study, the compatibility of ionic liquid (IL) electrolytes and graphite positive electrodes was investigated toward the development of dual-carbon batteries (DCBs). The FTA-based ILs were found to exhibit superior performance of graphite positive electrodes. In the case of FSA-based ILs, the performance was largely dependent on alkali metal cation species contained in the IL. In particular, extraordinary anion intercalation behavior was observed in the Na[FSA]-based IL. Finally, K[FTA]-[C4C1pyrr][FTA] IL was selected as a promising electrolyte for DCBs, which conferred moderate performance of a graphite/graphite full-cell. The achievement in this study indicates the feasibility of safe and rare metal-free rechargeable batteries.

Free Research Field

電気化学

Academic Significance and Societal Importance of the Research Achievements

イオン液体を用いたデュアルカーボン電池は、レアメタルフリーかつ安全性の高い二次電池であり、高起電力も見込まれる有望な次世代蓄電池の一つである。一方で、デュアルカーボン電池に関する研究は、従来のリチウムイオン電池と異なるメカニズムで動作することから、研究報告例は他の電池と比べて必ずしも多くは無い。本研究で得られた成果は、デュアルカーボン電池の高性能化に向けた指針を示すものであり、学術的および社会的意義が大きいと考えられる。