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NiCo2S4 Nanosheet-Decorated 3D, Porous Ni Film@Ni Wire Electrode Materials for All Solid-State Asymmetric Supercapacitor Applications

Abstract

A wire type supercapacitor with high energy and power densities has created 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 way is introduced to fabricate a 3D, porous Ni film deposited on Ni wire as a flexible electrode, and followed by NiCo2S4-decorated as a electroactive material. The fabricated NiCo2S4-decorated 3D, porous Ni film@Ni wire electrode display a superior performance as areal and volumetric capacitance of 1.228 F cm-2 and 199.74 F cm-3 at a current density of 0.2 mA cm-1 with maximum volumetric energy and power densities (EV: 6.935 mWh 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 exhibits a good areal and volumetric capacitance of CA: 0.12 F cm-2; CV: 19.57 F cm-2 with higher rate capability (92%). Asymmetric wire type supercapacitor demonstrates a low leakage current and self-discharge with a maximum volumetric energy (EV: 5.33 mWh cm-3) and power (PV: 855.69 mW cm-3) densities.

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Publication details

The article was received on 09 Sep 2017, accepted on 07 Nov 2017 and first published on 08 Nov 2017


Article type: Paper
DOI: 10.1039/C7NR06725A
Citation: Nanoscale, 2017, Accepted Manuscript
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    NiCo2S4 Nanosheet-Decorated 3D, Porous Ni Film@Ni Wire Electrode Materials for All Solid-State Asymmetric Supercapacitor Applications

    S. Balasubramaniam, S. Sivabalan, M. Seo, H. Y. Kim and B. Kim, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR06725A

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