Influences of the thickness of self-assembled graphene multilayer films on the supercapacitive performance

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	Influences of the thickness of self-assembled graphene multilayer films on the supercapacitive performance
	Liu WW(刘文文)1,2; Yan XB(阎兴斌)1 ; Lang JW(郎俊伟)1; Chen JT(陈江涛)1 ; Xue QJ(薛群基)1 ; Yan XB(阎兴斌); Yan XB(阎兴斌); Yan XB(阎兴斌)
刊名	Electrochimica Acta
	2012
卷号	60 页码:41-49
关键词	Graphene Multilayer Self-assembly Electrostatic adsorption Supercapacitors
ISSN号	0013-4686
通讯作者	阎兴斌
英文摘要	In this study, graphene multilayer films with controlled thicknesses deposited on indium tin oxide glass substrates were fabricated using electrostatic layer-by-layer self-assembly of negatively charged graphene oxide followed by hydrazine hydrate reduction. X-ray diffraction spectroscopy, Raman spectroscopy, UV–vis spectroscopy, field emission scanning electron microscopy and atomic force microscopy were used to characterize the microstructures and morphologies of the as-fabricated multilayer films. The supercapacitive properties of the multilayer film electrodes were investigated via cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectrometry in a 0.5 M Na₂SO₄ electrolyte. The graphene multilayer films employed as the electrode materials not only exhibited nearly rectangular cyclic voltammetry curves at an exceedingly high scan rate of 2000 mV/s, but also exhibited highly linear and symmetrical charge/discharge curves, which indicated that they have ideal electric double-layer capacitive behavior. Furthermore, the supercapacitive performance of the as-prepared graphene multilayer films exhibited a strong dependence on the number of self-assembled layers. Moreover, the specific capacitance per surface area for each self-assembled graphene film exhibited almost no decay after 1500 cycles, implying excellent stability and reversibility. These electrochemical tests indicated that the as-prepared graphene films have great potential for supercapacitor applications.
学科主题	材料科学与物理化学
收录类别	SCI
资助信息	the Top Hundred Talents Program of the Chinese Academy of Sciences;the National Nature Science Foundations of China (51005225);the Postdoctoral Science Foundation of China (20100480728)
语种	英语
WOS记录号	WOS:000300142100007
公开日期	2013-07-12
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/3333]
专题	兰州化学物理研究所_固体润滑国家重点实验室
通讯作者	Yan XB(阎兴斌); Yan XB(阎兴斌); Yan XB(阎兴斌)
作者单位	1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Liu WW,Yan XB,Lang JW,et al. Influences of the thickness of self-assembled graphene multilayer films on the supercapacitive performance[J]. Electrochimica Acta,2012,60:41-49.
APA	Liu WW.,Yan XB.,Lang JW.,Chen JT.,Xue QJ.,...&阎兴斌.(2012).Influences of the thickness of self-assembled graphene multilayer films on the supercapacitive performance.Electrochimica Acta,60,41-49.
MLA	Liu WW,et al."Influences of the thickness of self-assembled graphene multilayer films on the supercapacitive performance".Electrochimica Acta 60(2012):41-49.