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Issue 41, 2018
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Hierarchical layer-by-layer porous FeCo2S4@Ni(OH)2 arrays for all-solid-state asymmetric supercapacitors

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Abstract

Engineering multicomponent active materials as electrodes with a rationally structured design is an effective strategy to meet the high-performance requirements of supercapacitors. In this report we describe the fabrication of a hierarchical layer-by-layer porous FeCo2S4@Ni(OH)2 three-dimensional (3D) network on nickel foam, which shows both an excellent specific capacitance of 2984 F g−1 at 5 mA cm−2 and cycling stability over 5000 cycles. The outstanding performance is ascribed to the distinctive self-supported structure and the synergistic effect between FeCo2S4 and Ni(OH)2. Moreover, the all-solid-state FeCo2S4@Ni(OH)2//reduced graphene oxide asymmetric supercapacitor exhibits a high energy density of 64 W h kg−1 at a power density of 800 W kg−1 and excellent cycling stability (92.9% of capacity retention after 10 000 cycles), while the output voltage can reach 1.6 V. This rational design of the layer-by-layer structured electrode provides an innovative strategy for fabricating electrodes for future energy storage devices.

Graphical abstract: Hierarchical layer-by-layer porous FeCo2S4@Ni(OH)2 arrays for all-solid-state asymmetric supercapacitors

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Publication details

The article was received on 05 Aug 2018, accepted on 26 Sep 2018 and first published on 26 Sep 2018


Article type: Paper
DOI: 10.1039/C8TA07598K
Citation: J. Mater. Chem. A, 2018,6, 20480-20490
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    Hierarchical layer-by-layer porous FeCo2S4@Ni(OH)2 arrays for all-solid-state asymmetric supercapacitors

    S. Li, W. Huang, Y. Yang, J. Ulstrup, L. Ci, J. Zhang, J. Lou and P. Si, J. Mater. Chem. A, 2018, 6, 20480
    DOI: 10.1039/C8TA07598K

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