Electrochemical properties of Fe-based layered perovskites as cathode materials of rechargeable aqueous batteries

2023 Fiscal Year Final Research Report

• Project/Area Number: 22K14763
• 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: Miyahara Yuto 京都大学, 工学研究科, 助教 (60807816)
• Project Period (FY): 2022-04-01 – 2024-03-31
• Keywords: 水系二次電池 / 正極材料 / 層状ペロブスカイト

Outline of Final Research Achievements

Electochemical properties of layered perovskite oxide LaSr3Fe3O10-d in alkaline media was investigated. By various operando characterization, the effect of the salts in alkaline electrolytes and the elemental composition of the layered perovskite oxide, the charge-discharge mechanism of the material was successfully clarified. Through optimization of the elemental composition of the layered oxide, the charge-discharge capacity of the novel material was twice as high as that of LaSr3Fe3O10-d.

Free Research Field

電気化学

Academic Significance and Societal Importance of the Research Achievements

本研究は申請者らが新たに見出した二次電池材料の充放電機構を明らかにしたものであり、高エネルギー密度化の実証と併せた研究の展開に成功した点において学術的意義があると考えられる。また、本研究は二次電池分野のさらなる発展に際して課題となりうる資源リスクや安全性課題を低減し得るものであり、今後の継続的な研究によって水系二次電池の可能性を広げるものであると期待される。