煤基三维石墨烯基电极在不同电解液中的电化学性能<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.016.001

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Abstract 3D graphene holds promise as electrode materials for electric double layer capacitors due to its unique porous network structure, large specific surface area and excellent optical, electrical, thermal and mechanical properties. In this paper, 3D coal-based graphene (3D-CG) was prepared from coal by a combined technique involving the catalytic thermal treatment, modified Hummers method and one-step hydrothermal self-assembly method. The morphologies and structures of the samples were examined by TEM, SEM, XRD, FT-IR and Raman spectroscopy. Furthermore, the electrochemical properties of 3D-CG materials in 6 mol/L KOH, 1 mol/L H₂SO₄ and 1 mol/L Na₂SO₄ electrolyte were systematically studied by galvanostatic charge-discharge (GCD), cyclic voltammetry (CV) and electrochemical impedance spectra (EIS) tests. The results indicated the good capacitive performance and stability of 3D-CG, as the specific capacitance was 288.9 F/g in 6 mol/L KOH aqueous electrolyte, with a high retention ratio of 91.6% even after 1 000 cycles.

Key words： 3D coal-based graphene electrode material electrolyte electrochemical performance supercapacitor

Published: 07 May 2018

CLC number:	TB33
	TQ53

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	Articles by authors
	ZHANG Yating
	REN Shaozhao
	DANG Yongqiang
	LIU Guoyang
	LI Keke
	ZHOU Anning
	QIU Jieshan

Cite this article:

ZHANG Yating,REN Shaozhao,DANG Yongqiang, et al. Electrochemical Capacitive Properties of Coal-based Three-dimensional Graphene Electrode in Different Electrolytes[J]. Materials Reports, 2017, 31(16): 1-5.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.016.001 OR http://www.mater-rep.com/EN/Y2017/V31/I16/1

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