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Acta Phys. Chim. Sin.  2013, Vol. 29 Issue (02): 305-310    DOI: 10.3866/PKU.WHXB201211201
ELECTROCHEMISTRY AND NEW ENERGY     
Synthesis and Electrochemical Characterization of RuO2·xH2O/Graphite Nanosheet Composite Array Electrodes for Supercapacitors
HU Ying-Ying, HU Zhong-Ai, ZHANG Ya-Jun, LU Ai-Lian, XU Huan, ZHANG Zi-Yu, YANG Yu-Ying, LI Li, WU Hong-Ying
Key Laboratory of Polymer Materials of Gansu Province, Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, P.R. China
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Abstract  

We used electrochemical exfoliation to construct graphite nanosheet (GNS) arrays, in which the varying number of nanosheet layers were parallel to each other and perpendicular to the carbon substrate. Hydrous ruthenium oxide (RuO2·xH2O) was then loaded directly on the surface of nanosheets using cathodic reduction electrodeposition, resulting in the formation of RuO2·xH2O/GNS composite array electrodes. Electrochemical measurements showed that the composite array electrodes exhibited excellent capacitive behaviors, and achieved specific capacitance values as high as 4226 F·m-2 in the potential window up to 0.9 V, with a scan rate of 5 mV·s-1 in 0.5 mol·L-1 H2SO4 solution. The RuO2·xH2O/GNS composite array electrodes showed good cycling abilities, and maintained 94.18% of their maximum performance after 20000 cycles.



Key wordsSupercapacitor      Graphite nanosheet      RuO2      Electrodeposition      Array electrode     
Received: 07 September 2012      Published: 20 November 2012
MSC2000:  O646  
Cite this article:

HU Ying-Ying, HU Zhong-Ai, ZHANG Ya-Jun, LU Ai-Lian, XU Huan, ZHANG Zi-Yu, YANG Yu-Ying, LI Li, WU Hong-Ying. Synthesis and Electrochemical Characterization of RuO2·xH2O/Graphite Nanosheet Composite Array Electrodes for Supercapacitors. Acta Phys. Chim. Sin., 2013, 29(02): 305-310.

URL:

http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB201211201     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2013/V29/I02/305

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