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3D petal-like Ni3S2/CoNi2S4 hybrid grown on Ni foam as binder-free electrode for electrochemical energy storage

Abstract

In this study, a simple, one-pot synthesis method is developed to prepare three-dimensional petal-like Ni3S2/CoNi2S4 hybrid material which can be used as a binder-free electrode in electrochemical energy storage. The material possesses high areal capacity, such as 758 μAh cm-2 at the current density of 2 mA cm-2. With 20 fold current density increase, as-prepared material retains 70% of its original capacity. Furthermore, an asymmetric supercapacitor is assembled by using Ni3S2/CoNi2S4 hybrid as cathode and active carbon as anode in a coin cell. The cell exhibits an outstanding areal power density of 33.928 mW cm-2 at the areal energy density of 0.404 mWh cm-2 and still retains a quite high areal power density of 1.625 mW cm-2 at the areal energy density of 0.588 mWh cm-2. These results demonstrate that the 3D petal-like Ni3S2/CoNi2S4 hybrid is a promising cathode material of supercapacitors with excellent cycling stability and high-power density, suitable for practical applications.

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Publication details

The article was received on 14 Mar 2018, accepted on 08 Jun 2018 and first published on 12 Jun 2018


Article type: Paper
DOI: 10.1039/C8SE00130H
Citation: Sustainable Energy Fuels, 2018, Accepted Manuscript
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    3D petal-like Ni3S2/CoNi2S4 hybrid grown on Ni foam as binder-free electrode for electrochemical energy storage

    F. Chen, H. Wang, S. Ji, V. Linkov and R. Wang, Sustainable Energy Fuels, 2018, Accepted Manuscript , DOI: 10.1039/C8SE00130H

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