Electrochemical Properties of Polyaniline Electrodes Prepared by Chemical Synthesis and Electrodeposition: Revisited with High-Scan-Rate Behaviors

Ji Hyun Nam, Cho Hyeon Woo, Kwang Man Kim, Kwang Sun Ryu, Jang Myoun Ko
2012 Journal of Electrochemical Science and Technology  
The polyaniline (PANI) electrodes are prepared by chemical synthesis and electrodeposition methods and their supercapacitive properties are characterized and compared by morphology observation, cyclic voltammetry as a function of scan rate, and impedance spectra analysis. In particular, the supercapacitive properties obtained in the range of higher potential scan rates (e.g., over 200 mV s −1 ) are emphasized to be capable of utilizing adequately the high power capability of supercapacitor. As
more » ... supercapacitor. As a result, the PANI electrode by the electrodeposition shows superior specific capacitance (max. 474 F g −1 at 10 mV s −1 and about 390 F g −1 at 500 mV s −1 ) than those by the chemical synthesis method. This is mainly due to highly porous structure obtained by the electrodeposition to yield higher specific surface area.
doi:10.5229/jecst.2012.3.2.80 fatcat:f2c57wgq7fb3nlbgqkk33tnsza