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One-Step Synthesis of Self-Supported Ni3S2/NiS Composite Film on Ni Foam by Electrodeposition for High-Performance Supercapacitors

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Guangxi Novel Battery Materials Research Center of Engineering Technology, Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related Technology, Guangxi Key Laboratory for Relativistic Astrophysics, Center on Nanoenergy Research, School of Physics Science and Technology, Guangxi University, Nanning 530004, China
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Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials, Guangxi University, Nanning 530004, China
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Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(12), 1718; https://doi.org/10.3390/nano9121718
Received: 4 November 2019 / Revised: 24 November 2019 / Accepted: 26 November 2019 / Published: 2 December 2019
(This article belongs to the Section Synthesis, Interfaces, and Nanostructures)
Herein, a facile one-step electrodeposition route was presented for preparing Ni3S2/NiS composite film on Ni foam substrate (denoted as NiSx/NF). The NiSx granular film is composed of mangy interconnected ultra-thin NiSx nanoflakes with porous structures. When applied as electrodes for supercapacitors, the ultra-thin nanoflakes can provide more active sites for redox reaction, and the interconnected porous structure has an advantage for electrolyte ions to penetrate into the inner space of active materials quickly. As expected, the obtained NiSx/NF sample exhibited high gravimetric capacitance of 1649.8 F·g−1 and areal capacitance of 2.63 F·cm−2. Furthermore, a gravimetric capacitance of 1120.1 F·g−1 can be maintained at a high current density of 20 mA·cm−2, suggesting a good rate capability. The influence of the different molar ratios of electrodeposition electrolyte (NiNO3 and thiourea) on the morphology and electrochemical properties of NiSx/NF sample was investigated to provide an optimum route for one-step electrodeposition of Ni3S2/NiS composite film. The outstanding performance indicated the Ni3S2/NiS composite film on Ni foam has great potential as an electrode material for supercapacitors. View Full-Text
Keywords: supercapacitors; nickel sulfide; electrodeposition; nanoflakes supercapacitors; nickel sulfide; electrodeposition; nanoflakes
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MDPI and ACS Style

Huang, H.; Deng, X.; Yan, L.; Wei, G.; Zhou, W.; Liang, X.; Guo, J. One-Step Synthesis of Self-Supported Ni3S2/NiS Composite Film on Ni Foam by Electrodeposition for High-Performance Supercapacitors. Nanomaterials 2019, 9, 1718.

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