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Acta Physico-Chimica Sinica  2003, Vol. 19 Issue (06): 509-513    DOI: 10.3866/PKU.WHXB20030606
Carbon Nanotube Capacitor Materials Loaded with Different Amounts of Ruthenium Oxide
Wang Xiao-Feng;Wang Da-Zhi;Liang Ji
Department of Mechanical Engineering,Tsinghua University,Beijing 100084
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Abstract  Ruthenium oxide-carbon nanotubes composites with different loadings of RuO2 on carbon nanotubes have been synthesized.In order to design nanotube-based ruthenium oxide coated supercapacitor electrodes with large surface area,a new sol-gel process for the preparation of ultrafine RuO2 particles was developed.The composite electrodes consisting of carbon nanotube and RuO2•xH2O were developed by the deposition of RuO2 on the surface of carbon nanotube.Maximum capacitance was observed after heat treatment at 250 ℃ for all the composites.Supercapacitors based on the composite electrodes show much higher specific capacitance than those based on pure carbon nanotube ones.A specific capacitance of 570 F•g-1 can be achieved when the weight percent of RuO2•xH2O in the composite electrodes reaches 100%.In addition,supercapacitors based on the composite electrodes show both high energy density and high power density characteristics.

Key wordsRuthenium oxide      Carbon nanotube      Electrochemical capacitors       Supercapacitors     
Received: 20 September 2002      Published: 15 June 2003
Corresponding Authors: Wang Xiao-Feng     E-mail:
Cite this article:

Wang Xiao-Feng;Wang Da-Zhi;Liang Ji. Carbon Nanotube Capacitor Materials Loaded with Different Amounts of Ruthenium Oxide. Acta Physico-Chimica Sinica, 2003, 19(06): 509-513.

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