Anchoring Hydrous RuO(2) on Graphene Sheets for High-Performance Electrochemical Capacitors

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	Anchoring Hydrous RuO(2) on Graphene Sheets for High-Performance Electrochemical Capacitors
	Z. S. Wu; D. W. Wang; W. Ren; J. Zhao; G. Zhou; F. Li; H. M. Cheng
	2010
发表期刊	Advanced Functional Materials
ISSN	1616-301X
卷号	20 期号:20 页码:3595-3602
摘要	Hydrous ruthenium oxide (RuO(2))/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 RuO(2) particles (5-20 nm) and, simultaneously, the RuO(2) 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 RuO(2) 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 RuO(2) in their relative ratios, which is indicative of a positive synergistic effect of GSs and RuO(2) 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.
部门归属	[wu, zhong-shuai; ren, wencai; zhao, jinping; zhou, guangmin; li, feng; cheng, hui-ming] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [wang, da-wei] univ queensland, arc ctr excellence funct nanomat, aibn, brisbane, qld 4072, australia.;wu, zs (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;wcren@imr.ac.cn cheng@imr.ac.cn
关键词	Walled Carbon Nanotube Ruthenium Oxide Energy-storage Graphite Oxide Supercapacitor Application Electrode Materials Mesoporous Carbon Nanoparticles Ultracapacitors Polyaniline
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31592
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. S. Wu,D. W. Wang,W. Ren,et al. Anchoring Hydrous RuO(2) on Graphene Sheets for High-Performance Electrochemical Capacitors[J]. Advanced Functional Materials,2010,20(20):3595-3602.
APA	Z. S. Wu.,D. W. Wang.,W. Ren.,J. Zhao.,G. Zhou.,...&H. M. Cheng.(2010).Anchoring Hydrous RuO(2) on Graphene Sheets for High-Performance Electrochemical Capacitors.Advanced Functional Materials,20(20),3595-3602.
MLA	Z. S. Wu,et al."Anchoring Hydrous RuO(2) on Graphene Sheets for High-Performance Electrochemical Capacitors".Advanced Functional Materials 20.20(2010):3595-3602.