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Supercapacitive Properties of Composite Electrodes Consisting of Polyaniline, Carbon Nanotube, and RuO2
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- Authors
- Jang Myoun Ko, Kwang Sun Ryu, Sang Hyo Kim, Kwang Man Kim
- Issue Date
- 2009-08
- Citation
- Journal of Applied Electrochemistry, v.39, no.8, pp.1331-1337
- ISSN
- 0021-891X
- Language
- English
- Type
- Journal Article
- Project Code
- 09MB1500, Components/Module Technology for Ubiquitous Terminals, Kim Jongdae
- 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 H 2SO4. 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. © 2009 Springer Science+Business Media B.V.
- KSP Keywords
- Capacitance retention, Carbon nano-tube(CNT), Composite Electrode, Cycle performance, Cyclic voltammetry, Electrochemical deposition(ED), Electrolyte solution, First Stokes(S1), Impedance spectroscopy(IS), Specific capacitance, Supercapacitive properties