Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9776309 | Synthetic Metals | 2005 | 4 Pages |
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 273Â F/, which was larger than the capacitance of the ACP, approximately 193Â 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 1Â Hz.
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Authors
Kwang Sun Ryu, Young-Gi Lee, Kang Man Kim, Yong Joon Park, Young-Sik Hong, Xianglan Wu, Man Gu Kang, Nam-Gyu Park, Rak Young Song, Jang Myoun Ko,