Journal of Inorganic Materials ›› 2015, Vol. 30 ›› Issue (5): 505-510.DOI: 10.15541/jim20140500

• Research Paper • Previous Articles     Next Articles

Preparation and Electrochemical Performance of PPy/GO-RuO2 Film Electrode for Micro-supercapacitor

ZHU Ping1,2, CAI Ting1,2, HAN Gao-Yi3, XIONG Ji-Jun1,2   

  1. (1. Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan 030051, China; 2. North University of China, School Instrument and Electronics, Taiyuan 030051, China; 3. Shanxi Laboratory for Molecular Sciences, Shanxi University, Taiyuan 030006, China)
  • Received:2014-09-29 Revised:2015-01-25 Published:2015-05-20 Online:2015-04-28
  • Supported by:

    Natural Science Foundation of Shanxi Province(2012011010-2)

Abstract:

To address the issue that RuO2 was difficult to deposit directly on the micro-3D-structure metal current collector due to its high deposition potential, this study was engaged to prepare RuO2 composite film by the fractional electro-deposition method. PPy/GO film was firstly deposited on nickel current collector as substrate, then RuO2 particles were deposited on the substrate after heat-treatment, finally the RuO2 composite film was carried on a second heat-treatment. By means of scanning electron microscope (SEM), it can be found that the porous structures of RuO2 composite film multiply with the increase of heat-treatment temperature, so that the pore structure of the membrane electrode is improved. By means of X-ray energy dispersive spectroscope (EDS) and X-ray photoelectron spectroscope (XPS), the results indicate that there exists amorphous RuO2·xH2O in the film, which ensures the great specific capacity of the membrane electrode. The electrochemical testing results indicate that the electrochemical performance of membrane electrode is optimal when heat-treatment temperature reaches 105℃, with specific capacitance of 28.5 mF/cm2, energy density of 0.04 Wh/m2 and power density of 14.25 W/m2. The RuO2 composite film prepared by using step-by-step electro-deposition method is a type of excellent electrode material for micro-supercapacitor.

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Key words: RuO2 composite films, step-by-step electro-deposition, heat treatment, micro-supercapacitor

CLC Number: