Anchoring Hydrous RuO2 on Graphene Sheets for High-Performance Electrochemical Capacitors

doi:10.1002/adfm.201001054

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	Anchoring Hydrous RuO2 on Graphene Sheets for High-Performance Electrochemical Capacitors
	Wu, Zhong-Shuai 2; Wang, Da-Wei 1; Ren, Wencai 2; Zhao, Jinping 2; Zhou, Guangmin 2; Li, Feng 2; Cheng, Hui-Ming 2
刊名	ADVANCED FUNCTIONAL MATERIALS
	2010-10-22
卷号	20 期号:20 页码:3595-3602
ISSN号	1616-301X
DOI	10.1002/adfm.201001054
通讯作者	Wu, Zhong-Shuai()
英文摘要	Hydrous ruthenium oxide (RuO2)/graphene sheet composites (ROGSCs) with different loadings of Ru are prepared by combining sol-gel and low-temperature annealing processes. The graphene sheets (GSs) are well-separated by fine RuO2 particles (5-20 nm) and, simultaneously, the RuO2 particles are anchored by the richly oxygen-containing functional groups of reduced, chemically exfoliated GSs onto their surface. Benefits from the combined advantages of GSs and RuO2 in such a unique structure are that the ROGSC-based supercapacitors exhibit high specific capacitance (similar to 570 F g(-1) for 38.3 wt% Ru loading), enhanced rate capability, excellent electrochemical stability (similar to 97.9% retention after 1000 cycles), and high energy density (20.1 Wh kg(-1)) at low operation rate (100 mA g(-1)) or high power density (10000 W kg(-1)) at a reasonable energy density (4.3 Wh kg(-1)). Interestingly, the total specific capacitance of ROGSCs is higher than the sum of specific capacitances of pure GSs and pure RuO2 in their relative ratios, which is indicative of a positive synergistic effect of GSs and RuO2 on the improvement of electrochemical performance. These findings demonstrate the importance and great potential of graphene-based composites in the development of high-performance energy-storage systems.
资助项目	Ministry of Science and Technology of China[2006CB932703] ; National Science Foundation of China[50872136] ; National Science Foundation of China[50972147] ; National Science Foundation of China[50921004] ; National Science Foundation of China[50632040] ; Chinese Academy of Sciences[KJCX2-YW-231]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000284000200022
资助机构	Ministry of Science and Technology of China ; National Science Foundation of China ; Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/100686]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wu, Zhong-Shuai
作者单位	1.Univ Queensland, ARC Ctr Excellence Funct Nanomat, AIBN, Brisbane, Qld 4072, Australia 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wu, Zhong-Shuai,Wang, Da-Wei,Ren, Wencai,et al. Anchoring Hydrous RuO2 on Graphene Sheets for High-Performance Electrochemical Capacitors[J]. ADVANCED FUNCTIONAL MATERIALS,2010,20(20):3595-3602.
APA	Wu, Zhong-Shuai.,Wang, Da-Wei.,Ren, Wencai.,Zhao, Jinping.,Zhou, Guangmin.,...&Cheng, Hui-Ming.(2010).Anchoring Hydrous RuO2 on Graphene Sheets for High-Performance Electrochemical Capacitors.ADVANCED FUNCTIONAL MATERIALS,20(20),3595-3602.
MLA	Wu, Zhong-Shuai,et al."Anchoring Hydrous RuO2 on Graphene Sheets for High-Performance Electrochemical Capacitors".ADVANCED FUNCTIONAL MATERIALS 20.20(2010):3595-3602.