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Issue 47, 2017
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NiCo2S4 nanosheet-decorated 3D, porous Ni film@Ni wire electrode materials for all solid-state asymmetric supercapacitor applications

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Abstract

Wire type supercapacitors with high energy and power densities have generated considerable interest in wearable applications. Herein, we report a novel NiCo2S4-decorated 3D, porous Ni film@Ni wire electrode for high performance supercapacitor application. In this work, a facile method is introduced to fabricate a 3D, porous Ni film deposited on a Ni wire as a flexible electrode, followed by decoration with NiCo2S4 as an electroactive material. The fabricated NiCo2S4-decorated 3D, porous Ni film@Ni wire electrode displays a superior performance with an areal and volumetric capacitance of 1.228 F cm−2 and 199.74 F cm−3, respectively, at a current density of 0.2 mA cm−1 with a maximum volumetric energy and power density (EV: 6.935 mW h cm−3; PV: 1.019 W cm−3). Finally, the solid state asymmetric wire type supercapacitor is fabricated using the fabricated NiCo2S4-decorated 3D, porous Ni film@Ni wire as a positive electrode and N-doped reduced graphene oxide (N-rGO) as a negative electrode and this exhibits good areal and volumetric capacitances of CA: 0.12 F cm−2 and CV: 19.57 F cm−2 with a higher rate capability (92%). This asymmetric wire type supercapacitor demonstrates a low leakage current and self-discharge with a maximum volumetric energy (EV: 5.33 mW h cm−3) and power (PV: 855.69 mW cm−3) density.

Graphical abstract: NiCo2S4 nanosheet-decorated 3D, porous Ni film@Ni wire electrode materials for all solid-state asymmetric supercapacitor applications

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Supplementary files

Article information


Submitted
09 Sep 2017
Accepted
07 Nov 2017
First published
08 Nov 2017

Nanoscale, 2017,9, 18819-18834
Article type
Paper

NiCo2S4 nanosheet-decorated 3D, porous Ni film@Ni wire electrode materials for all solid-state asymmetric supercapacitor applications

B. Saravanakumar, S. S. Jayaseelan, M. Seo, H. Kim and B. Kim, Nanoscale, 2017, 9, 18819
DOI: 10.1039/C7NR06725A

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