Anchoring hydrous RuO2 on graphene sheets for high-performance electrochemical capacitors

Wu, Zhong-Shuai, Wang, Da-Wei, Ren, Wencai, Zhao, Jinping, Zhou, Guangmin, Li, Feng and Cheng, Hui-Ming (2010) Anchoring hydrous RuO2 on graphene sheets for high-performance electrochemical capacitors. Advanced Functional Materials, 20 20: 3595-3602. doi:10.1002/adfm.201001054


Author Wu, Zhong-Shuai
Wang, Da-Wei
Ren, Wencai
Zhao, Jinping
Zhou, Guangmin
Li, Feng
Cheng, Hui-Ming
Title Anchoring hydrous RuO2 on graphene sheets for high-performance electrochemical capacitors
Formatted title
Anchoring hydrous RuO2 on graphene sheets for high-performance electrochemical capacitors
Journal name Advanced Functional Materials   Check publisher's open access policy
ISSN 1616-301X
1616-3028
Publication date 2010-10-22
Sub-type Article (original research)
DOI 10.1002/adfm.201001054
Volume 20
Issue 20
Start page 3595
End page 3602
Total pages 8
Place of publication Weinheim, Germany
Publisher Wiley
Collection year 2011
Language eng
Formatted abstract
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 (∼570 F g−1 for 38.3 wt% Ru loading), enhanced rate capability, excellent electrochemical stability (∼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.
Copyright © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Keyword Composites
Energy storage
Graphene
Ruthenium oxide
Supercapacitors
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
Australian Institute for Bioengineering and Nanotechnology Publications
 
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Created: Fri, 11 Mar 2011, 11:00:39 EST by Celestien Warnaar-Notschaele on behalf of Aust Institute for Bioengineering & Nanotechnology