Development of metal-oxygen batteries using reversible extraction/reinsertion from/in perovskite-type transition metal oxides for cathode reactions

2016 Fiscal Year Final Research Report

• Project/Area Number: 26289371
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Energy engineering
• Research Institution: The University of Tokyo
• Principal Investigator: HIBINO Mitsuhiro 東京大学, 工学(系)研究科(研究院), 研究員 (20270910)
• Co-Investigator(Kenkyū-buntansha): 水野 哲孝 東京大学, 工学(系)研究科(研究院), 教授 (50181904)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 二次電池 / 正極材料 / ペロブスカイト型酸化物 / マグネシウム負極 / アルミニウム負極 / 過酸化物電池

Outline of Final Research Achievements

For new batteries using reactions involving oxide ions in a metal oxide, the following results were obtained: (1) Perovskite-type metal oxides allowing electrochemical extraction and reinsertion of oxide ions were investigated as cathodes for Mg or Al batteries. (a) Discharge and charge behaviors at 80°C of a cell containing a SrFeO3 cathode and a Mg anode were investigated. Compared with the case at room temperature, while polarization drastically decreased, side reactions involving an electrolyte were promoted. As a result, reversibility between discharging and charging decreased. (b) Discharge and charge behaviors of a cell containing a Ca0.5La0.5FeO2.91(CLFO) cathode and an Al anode were investigated. CLFO underwent extraction of oxide ions to be Ca0.5La0.5FeO2.76 during discharge, while no reinsertion proceeded during charge. (2) Fe- and Cu-doped Li2O were successfully synthesized. Oxide ions in them were demonstrated to be reversibly oxidized to peroxide ions during charge.

Free Research Field

固体電気化学