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Issue 8, 2018
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Hierarchical FeS/RGO/FeS@Fe foil as high-performance negative electrode for asymmetric supercapacitors

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Abstract

A hierarchical FeS/RGO/FeS composite in situ grown on Fe foil was designed and prepared via an Fe foil-involved one-step hydrothermal route, in which Fe foil acted as the Fe source for the lower FeS layer, reductant of GO and subsequent current collector. The as-prepared FeS/RGO/FeS@Fe showed a high specific capacity of 247.5 C g−1 (206.25 F g−1) and good cyclability with 118% capacity retention after 5000 cycles when directly used as an electrode. Additionally, an asymmetric supercapacitor (ASC) was assembled using Ni(OH)2 and FeS/RGO/FeS@Fe as the positive electrode and negative electrode, respectively. This ASC exhibited maximum power density and energy density of 20 000 W kg−1 and 34.07 W h kg−1, respectively, suggesting that FeS/RGO/FeS is a promising negative electrode material.

Graphical abstract: Hierarchical FeS/RGO/FeS@Fe foil as high-performance negative electrode for asymmetric supercapacitors

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Publication details

The article was received on 15 Mar 2018, accepted on 05 Jun 2018 and first published on 07 Jun 2018


Article type: Research Article
DOI: 10.1039/C8QI00227D
Citation: Inorg. Chem. Front., 2018,5, 1912-1922
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    Hierarchical FeS/RGO/FeS@Fe foil as high-performance negative electrode for asymmetric supercapacitors

    X. Shao, Z. Zhu, C. Zhao, C. Zhao and X. Qian, Inorg. Chem. Front., 2018, 5, 1912
    DOI: 10.1039/C8QI00227D

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