Vertically oriented Ni3S2/RGO/Ni3S2 nanosheets on Ni foam for superior supercapacitors

Chongjun Zhao; Zhuomin Zhang; Qian Wang; Shudi Min; Xiuzhen Qian

doi:10.1039/C5RA08701E

Vertically oriented Ni₃S₂/RGO/Ni₃S₂ nanosheets on Ni foam for superior supercapacitors

Chongjun Zhao,*^a Zhuomin Zhang,^a Qian Wang,^a Shudi Min^a and Xiuzhen Qian^a

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* Corresponding authors

^a Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
E-mail: chongjunzhao@ecust.edu.cn
Fax: +86-21-6425-0838
Tel: +86-21-6425-0838

Abstract

A unique sandwich structure of Ni₃S₂/RGO/Ni₃S₂ consisting of Ni₃S₂ nanosheets was designed and constructed on nickel foam (NF) by a one-step hydrothermal process. The lower Ni₃S₂ layer was converted in situ from the Ni foam substrate, while the upper Ni₃S₂ layer with vertical nanosheets resulted from Ni²⁺ ions in the solution. This Ni₃S₂/RGO/Ni₃S₂/NF nanocomposite was directly utilized as a supercapacitor electrode, which possessed a high areal mass loading of 5.2 mg cm⁻², and superior performance: a specific capacitance of up to 16.82 F cm⁻² (i.e., 3234.62 F g⁻¹) at a current density of 20 mA cm⁻² (3.85 A g⁻¹) and 90% retention of the initial capacitance after 1000 cycles at the high rate of 100 mA cm⁻² (19.23 A g⁻¹).

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Publication details

The article was received on 10 May 2015, accepted on 20 Jul 2015 and first published on 20 Jul 2015

Article type: Paper

DOI: 10.1039/C5RA08701E

Citation: RSC Adv., 2015,5, 63528-63536

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Vertically oriented Ni₃S₂/RGO/Ni₃S₂ nanosheets on Ni foam for superior supercapacitors

C. Zhao, Z. Zhang, Q. Wang, S. Min and X. Qian, RSC Adv., 2015, 5, 63528
DOI: 10.1039/C5RA08701E
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Vertically oriented Ni₃S₂/RGO/Ni₃S₂ nanosheets on Ni foam for superior supercapacitors

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Vertically oriented Ni₃S₂/RGO/Ni₃S₂ nanosheets on Ni foam for superior supercapacitors

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