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Issue 23, 2017
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Hierarchical core–shell CoMn2O4@MnO2 nanoneedle arrays for high-performance supercapacitors

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Abstract

Hierarchical mesoporous core–shell CoMn2O4@MnO2 nanoneedle arrays on nickel foam have been manufactured via a two-step hydrothermal process. Electrochemical performances of the CoMn2O4@MnO2 nanomaterials have been tested for supercapacitors and demonstrated outstanding properties. The CoMn2O4@MnO2 electrode delivers a specific capacitance of 2126 F g−1 at a current density of 1 A g−1 in 2 M KOH aqueous solution and also shows an excellent cycling stability, which retains 94.4% of the initial capacitance after 5000 charge/discharge cycles at a current density of 4 A g−1. The result confirms the superiority of the CoMn2O4@MnO2 electrode compared with the CoMn2O4 electrode and demonstrates the potential application of the CoMn2O4@MnO2 nanoneedle array electrode for high-performance energy storage device applications.

Graphical abstract: Hierarchical core–shell CoMn2O4@MnO2 nanoneedle arrays for high-performance supercapacitors

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Publication details

The article was received on 29 Mar 2017, accepted on 19 May 2017 and first published on 19 May 2017


Article type: Paper
DOI: 10.1039/C7DT01127J
Citation: Dalton Trans., 2017,46, 7451-7456
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    Hierarchical core–shell CoMn2O4@MnO2 nanoneedle arrays for high-performance supercapacitors

    T. Peng, S. Fang, C. Liu, X. Hou, H. Yang, R. Luo, Q. Yu, Y. Lu, H. Yan and Y. Luo, Dalton Trans., 2017, 46, 7451
    DOI: 10.1039/C7DT01127J

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