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Hybrid MnO2@NiCo2O4 nanosheets for high performance asymmetric supercapacitors

Abstract

NiCo2O4 is a promising material for supercapacitors because of its high theoretical capacity. However, this material often suffers from low cycling stability. In this work, hybrid MnO2@NiCo2O4 nanosheets grown on Ni foam have been synthesized through a facile hydrothermal approach. The MnO2@NiCo2O4 electrode delivers a high specific capacitance of 3086 mF cm-2 at the current density of 2 mA cm-2, and the as-assembled asymmetric supercapacitors yield a high energy density of 72.1 Wh kg-1 and an excellent cyclic life with a 97.3% capacitance retention after 6000 cycles. The outstanding electrochemical performance could be attributed to the unique hybrid structures of the electrode materials. It shows that the MnO2@NiCo2O4 hybrid structures as the electrode materials might be potential useful for next generation high performance supercapacitors.

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Publication details

The article was received on 24 Feb 2018, accepted on 04 Apr 2018 and first published on 04 Apr 2018


Article type: Research Article
DOI: 10.1039/C8QI00170G
Citation: Inorg. Chem. Front., 2018, Accepted Manuscript
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    Hybrid MnO2@NiCo2O4 nanosheets for high performance asymmetric supercapacitors

    D. Zhao, X. Wu and C. Guo, Inorg. Chem. Front., 2018, Accepted Manuscript , DOI: 10.1039/C8QI00170G

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