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Supercapacitive properties of composite electrodes consisting of polyaniline, carbon nanotube, and RuO2

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Abstract

Three types of composite supercapacitor electrodes were prepared; electroactive polyaniline (PANI), PANI/multi-walled carbon nanotube (CNT), and PANI/CNT/RuO2. Specifically, the PANI and PANI/CNT were prepared by polymerization, and PANI/CNT/RuO2 was prepared by electrochemical deposition of RuO2 on the PANI/CNT matrix. Cyclic voltammetry between −0.2 and 0.8 V (vs. Ag/AgCl) at various scan rates was performed to investigate the supercapacitive properties in an electrolyte solution of 1.0 M H2SO4. The PANI/CNT/RuO2 electrode showed the highest specific capacitance at all scan rates (e.g., 441 and 392 F g−1 at 100 and 1,000 mV s−1, respectively). In contrast, the PANI/CNT electrode demonstrated the best capacitance retention (66%) after 104 cycles. Additional analysis including morphology and complex impedance spectroscopy suggested that with small loading of RuO2, an increase in capacitance was observed, but dissolution and/or detachment of RuO2 species from the electrode might occur during cycling to reduce the cycle performance.

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Acknowledgment

One of the authors (JMK) appreciates the financial support for this work through the World-Class University Program (R33-2008-000-10147-0) from the Korean Ministry of Education, Science and Technology.

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Authors and Affiliations

  1. Department of Applied Chemistry & Biotechnology, Hanbat National University, Yusong, Daejeon, 305-719, South Korea

    Jang Myoun Ko

  2. Department of Chemistry, Ulsan University, Ulsan, 680-749, South Korea

    Kwang Sun Ryu

  3. College of Bionanotechnology, Kyungwon University, Seongnam, Gyeonggi, 461-701, South Korea

    Sanghyo Kim

  4. Research Team of Next-Generation Energy Technology, Electronics and Telecommunications Research Institute (ETRI), Yusong, Daejeon, 305-700, South Korea

    Kwang Man Kim

Authors
  1. Jang Myoun Ko
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  2. Kwang Sun Ryu
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  3. Sanghyo Kim
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Correspondence to Jang Myoun Ko or Kwang Man Kim.

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Ko, J.M., Ryu, K.S., Kim, S. et al. Supercapacitive properties of composite electrodes consisting of polyaniline, carbon nanotube, and RuO2 . J Appl Electrochem 39, 1331–1337 (2009). https://doi.org/10.1007/s10800-009-9800-y

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  • DOI: https://doi.org/10.1007/s10800-009-9800-y

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