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Journal Article
Electrochemical Capacitor with Chemically Polymerized Conducting Polymer based on Activated Carbon as Hybrid Electrodes
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- Authors
- Kwang Sun Ryu, Young Gi Lee, Kang Man Kim, Yong Joon Park, Young Sik Hong, Xiang Lan Wu, Man Gu Kang, Nam Gyu Park, Rak Young Song, Jang Myoun Ko
- Issue Date
- 2005-09
- Citation
- Synthetic Metals, v.153, no.1-3, pp.89-92
- ISSN
- 0379-6779
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- ACP/PAn hybrid electrodes for surpercapacitors were fabricated by adsorption of aniline monomers on the surface of activated carbon powders (ACP) and their polymerization by using a chemical method. Their capacitance performances were investigated in the 1M H2SO4 aqueous electrolyte solution by means of cyclic voltammetry and impedance spectroscopy. The cyclic voltammetric results showed that the ACP/PAn electrodes gave an increased specific capacitance value of 273 F/, which was larger than the capacitance of the ACP, approximately 193 F/g. However, impedance spectroscopic data showed better response time and higher frequency capacitance performance in ACP than ACP/PAn electrodes. This result means that the redox reaction of PAn is rate-determined step and can not contribute for charge storage at high frequency range over 1 Hz. © 2005 Elsevier B.V. All rights reserved.