Preparation of Graphene/Co<sub>2</sub>O<sub>3</sub>-NiO via Electrochemical Methods and Its Property in Supercapacitor

化学工业与工程

Chemcial Industry and Engineering

2018, Vol. 35

Issue (1) :63-68 DOI: 10.13353/j.issn.1004.9533.20161094

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Preparation of Graphene/Co₂O₃-NiO via Electrochemical Methods and Its Property in Supercapacitor

Wang Hongzhi, Jiang Shisheng, Shi Yulei, Zhang Weiguo, Yao Suwei

Shanshan Research Office of Surface Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

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Abstract

For the purpose of searching supercapacitor material with high property, graphene/Co₂O₃-NiO film electrode was prepared by electrochemical method, whose working potential is determined by polarization curves. Morphology and structure characterization results indicate that nickel and cobalt existing in the form of NiO and Co₂O₃. NiO and Co₂O₃ particles with diameters between 50 nm and 200 nm are distributed between and on the surface of graphene, forming a sandwich structure. Cyclic voltammetry curves indicate the performance of graphene/Co₂O₃-NiO was improved obviously, compared with that of graphene. Charge-Discharge curves suggest that its specific capacitance reached 503 F/g at a current density of 2 A/g, and the capacitance remained 91% after 500 cycles.

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	Wang Hongzhi
	Jiang Shisheng
	Shi Yulei
	Zhang Weiguo
	Yao Suwei

Keywords： graphene； nickel-cobalt oxide； supercapacitor； electrochemical

Received 2016-05-04;

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Wang Hongzhi, Jiang Shisheng, Shi Yulei, Zhang Weiguo, Yao Suwei.Preparation of Graphene/Co₂O₃-NiO via Electrochemical Methods and Its Property in Supercapacitor[J] Chemcial Industry and Engineering, 2018,V35(1): 63-68

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