Mesoporous La0.6Ca0.4CoO3 perovskites with large surface areas as stable air electrodes for rechargeable Zn-air batteries

T. Ishihara, L. M. Guo, T. Miyano, Y. Inoishi, K. Kaneko, S. Ida

    Research output: Contribution to journalArticlepeer-review

    17 Citations (Scopus)

    Abstract

    Large-capacity rechargeable batteries are becoming increasingly necessary for mobile devices, and the metal-air battery is currently the most promising for this application. Although Zn-air rechargeable batteries have a long research history, they remain far from commercialization due to their poor charge-discharge cycle life and are currently used only as primary batteries. One reason for this is the low stability of the air electrode against reversible operation. In this study, the extremely positive effects of a mesoporous nanosheet structure in La0.6Ca0.4CoO3 perovskite oxide - a non-precious metal air electrode catalyst - on the cycle life of the Zn-air battery (>1000 cycles) with a high discharge potential of 1.15 V at 50 mA cm-2 are demonstrated. The high reversibility is a result of low activity toward carbon oxidation during the charge process, which may result from the large surface area of the porous nanosheet structure and also the high stability of the perovskite phase.

    Original languageEnglish
    Pages (from-to)7686-7692
    Number of pages7
    JournalJournal of Materials Chemistry A
    Volume6
    Issue number17
    DOIs
    Publication statusPublished - 2018

    All Science Journal Classification (ASJC) codes

    • Chemistry(all)
    • Renewable Energy, Sustainability and the Environment
    • Materials Science(all)

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