| Budget Amount *help |
¥15,990,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥3,690,000)
Fiscal Year 2016: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2015: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2014: ¥9,880,000 (Direct Cost: ¥7,600,000、Indirect Cost: ¥2,280,000)
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| 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.
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