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Cabbage leaves like nanostructure of NiS@ZnS composite on Ni foam with excellent electrochemical performance for supercapacitors

Abstract

In the present study, a NiS@ZnS composite nanostructure was synthesized on a nickel foam substrate by a facile chemical bath deposition (CBD) method. The prepared composites were analyzed by X-ray photoelectron spectroscopy, high resolution transmission electron microscopy, and field emission–scanning electron microscopy. The electrochemical performance of the supercapacitor (SC) electrodes was examined by cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy. The NiS@ZnS composite exhibited a muscle tissue-like nanostructure and showed outstanding electrochemical performance in SCs with a specific capacitance of 1533.0 Fg-1 at a current density of 7.5 A g-1, good cycling stability with 97.9% retention over 3000 cycles, greater energy density, and excellent rate capability compared to the bare NiS (1279.83 F g-1) and ZnS (616.66 F g-1)-based electrodes in SCs. The facile, novel synthesis method, outstanding performance, well defined surface morphology, synergetic effect and low-cost make the NiS@ZnS composite an ideal electrode material for electrochemical energy storage devices.

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Supplementary files

Publication details

The article was received on 16 Oct 2018, accepted on 27 Nov 2018 and first published on 28 Nov 2018


Article type: Paper
DOI: 10.1039/C8DT04139C
Citation: Dalton Trans., 2018, Accepted Manuscript
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    Cabbage leaves like nanostructure of NiS@ZnS composite on Ni foam with excellent electrochemical performance for supercapacitors

    K. D. Ikkurthi, S. Srinivasa Rao, J. Ahn, C. D. Sunesh and H. Kim, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C8DT04139C

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