2023 Fiscal Year Final Research Report
Development of novel active materials for secondary batteries based on intercalation reaction of fluoride ions
| Project/Area Number |
21K05251
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 36020:Energy-related chemistry
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| Research Institution | Osaka Research Institute of Industrial Science and Technology |
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Principal Investigator |
SAITO Makoto 地方独立行政法人大阪産業技術研究所, 和泉センター, 主任研究員 (50736288)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 二次電池 / フッ化物イオン電池 |
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| Outline of Final Research Achievements |
Anion insertion/desorption reactions of cyano-bridged molybdenum complexes and battery systems based on these complexes were studied. Insertion/desorption reactions were observed for relatively small fluoride ions, but not for larger anions such as chloride and sulfate ions. The size of the anion insertion/desorption site was also found to be an important factor of insertion/desesorption reactions.
A prototype battery was fabricated with this compound as the positive electrode and metallic zinc as the negative electrode. It showed a charge voltage of 2.0 V and a discharge voltage of approximately 1.85 V.
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| Free Research Field |
電池技術
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| Academic Significance and Societal Importance of the Research Achievements |
電気自動車、電力貯蔵など蓄電池の用途が拡大していく中、元素戦略に着目した電池系の開発は学術面のみならず、エネルギー安全保障上も重要な課題である。本研究で着目したフッ化物イオン電池に用いるフッ素は、現在主流のリチウムの約10倍の埋蔵量を有している。また、水系電解液を用いた蓄電池を構築できることから安全性の向上も期待される。
学術面においては、従来、カチオンの挿入脱離反応が報告されている材料に対して、アニオン（フッ化物イオン）が可逆的に挿入脱離することを示した。
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