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Issue 5, 2019
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A high-performance asymmetric supercapacitor based on Ni3S2-coated NiSe arrays as positive electrode

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Abstract

NiSe rods coated with cotton-like Ni3S2 were directly grown on nickel foam through a two-step process, comprising selenization and electrodeposition. The as-obtained NiSe/Ni3S2 composite electrode exhibited excellent electrochemical properties, with a high specific capacitance of 8.81 F cm−2 (1259.3 F g−1) at a current density of 4 mA cm−2, which was better than the value of pure NiSe electrode (5.17 F cm−2; 861.8 F g−1) at the same current density. Moreover, an asymmetric supercapacitor (ASC) was fabricated using NiSe/Ni3S2 electrode and AC electrode as positive electrode and negative electrode, respectively. This ASC extended the potential window to 1.6 V and was possessed of a superior energy density of 38.7 W h kg−1 at a power density of 192 W kg−1, with outstanding cycling stability (85.9% retention after 10 000 cycles).

Graphical abstract: A high-performance asymmetric supercapacitor based on Ni3S2-coated NiSe arrays as positive electrode

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Publication details

The article was received on 24 Oct 2018, accepted on 27 Dec 2018 and first published on 28 Dec 2018


Article type: Paper
DOI: 10.1039/C8NJ05399E
Citation: New J. Chem., 2019,43, 2389-2399

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    A high-performance asymmetric supercapacitor based on Ni3S2-coated NiSe arrays as positive electrode

    B. Ye, C. Gong, M. Huang, J. Ge, L. Fan, J. Lin and J. Wu, New J. Chem., 2019, 43, 2389
    DOI: 10.1039/C8NJ05399E

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