期刊
JOURNAL OF APPLIED ELECTROCHEMISTRY
卷 39, 期 8, 页码 1331-1337出版社
SPRINGER
DOI: 10.1007/s10800-009-9800-y
关键词
Polyaniline; Carbon nanotube; Ruthenium oxide; Supercapacitor
资金
- Korean Ministry of Education, Science and Technology [R33-2008-000-10147-0]
- Korea Evaluation Institute of Industrial Technology (KEIT) [KI001602] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [핵06B3011, R33-2008-000-10147-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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 10(4) 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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