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Issue 23, 2013
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Multifunctional inorganic electrode materials for high-performance rechargeable metal–air batteries

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Abstract

This paper reports the application of Ni–Fe layered double hydroxides (LDHs) intercalated with CO32− (Ni–Fe CO32− LDH) to a catalyst layer of a rechargeable metal–air battery using an alkaline electrolyte. Ni–Fe CO32− LDH is found to play multifunctional roles in the catalyst layer as a mixed conductor with hydroxide ions and electrons, and also as an electrocatalyst. The air electrode with Ni–Fe CO32− LDH shows superior performance to all electrodes with other LDHs, indicating that Ni–Fe CO32− LDH forms more favorable triple-phase boundary regions in the catalyst layer of the air electrode. The Ni–Fe CO32− LDH addition to the catalyst layer of the reversible air electrode using α-MnO2 also improves the performance of a rechargeable zinc–air battery. The reversible air electrode with α-MnO2 shows good cycle stability during 40 cycles, indicating that Ni–Fe LDH as an ionomer remains stable in the reversible air electrode after cycles. There must be a limited influence of CO2 on Ni–Fe CO32− LDH which can exist stably in air. Consequently, these results demonstrate that Ni–Fe CO32− LDHs are promising materials for use as multifunctional ionomers with high durability. They are widely applicable to rechargeable metal–air batteries using alkaline electrolytes.

Graphical abstract: Multifunctional inorganic electrode materials for high-performance rechargeable metal–air batteries

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Publication details

The article was received on 30 Jan 2013, accepted on 05 Apr 2013 and first published on 08 Apr 2013


Article type: Paper
DOI: 10.1039/C3TA10440K
Citation: J. Mater. Chem. A, 2013,1, 6804-6809
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    Multifunctional inorganic electrode materials for high-performance rechargeable metal–air batteries

    D. Kubo, K. Tadanaga, A. Hayashi and M. Tatsumisago, J. Mater. Chem. A, 2013, 1, 6804
    DOI: 10.1039/C3TA10440K

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