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Hierarchical core-shell CoMn2O4@MnO2 nanoneedle arrays for high-performance supercapacitors

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 an outstanding property. 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 CoMn2O4@MnO2 nanoneedle arrays electrode for high-performance energy storage device applications.

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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, Accepted Manuscript
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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, Accepted Manuscript , DOI: 10.1039/C7DT01127J

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