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Issue 8, 2018
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A 3D petal-like Ni3S2/CoNi2S4 hybrid grown on Ni foam as a binder-free electrode for energy storage

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Abstract

In this study, a simple and one-pot synthesis method is developed to prepare a three-dimensional petal-like Ni3S2/CoNi2S4 hybrid material which can be used as a binder-free electrode in electrochemical energy storage. This material possesses a high areal capacity, such as 758 μA h cm−2 at a current density of 2 mA cm−2. With a 20-fold current density increase, the as-prepared material retains 70% of its original capacity. Furthermore, an asymmetric supercapacitor is assembled by using the Ni3S2/CoNi2S4 hybrid as the cathode and active carbon as the anode in a coin cell. This cell exhibits an outstanding areal power density of 31.212 mW cm−2 at an areal energy density of 0.288 mW h cm−2 and still retains a quite high areal power density of 3.876 mW cm−2 at an areal energy density of 0.364 mW h cm−2. These results show that the 3D petal-like Ni3S2/CoNi2S4 hybrid is a promising cathode material for practical application in energy storage.

Graphical abstract: A 3D petal-like Ni3S2/CoNi2S4 hybrid grown on Ni foam as a binder-free electrode for energy storage

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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, 2018,2, 1791-1798
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    A 3D petal-like Ni3S2/CoNi2S4 hybrid grown on Ni foam as a binder-free electrode for energy storage

    F. Chen, H. Wang, S. Ji, V. Linkov and R. Wang, Sustainable Energy Fuels, 2018, 2, 1791
    DOI: 10.1039/C8SE00130H

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