Journal of Electrochemical Science and Technology

The Korean Electrochemical Society (한국전기화학회)
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Electrochemical Properties of Polyaniline Electrodes Prepared by Chemical Synthesis and Electrodeposition: Revisited with High-Scan-Rate Behaviors

  • Nam, Ji Hyun (Department of Chemical and Biological Engineering, Hanbat National University) ;
  • Woo, Cho Hyeon (Department of Chemical and Biological Engineering, Hanbat National University) ;
  • Kim, Kwang Man (Research Team of Power Control Devices, Electronics & Telecommunications Research Institute (ETRI)) ;
  • Ryu, Kwang Sun (Department of Chemistry, University of Ulsan) ;
  • Ko, Jang Myoun (Department of Chemical and Biological Engineering, Hanbat National University)
  • Received : 2012.05.17
  • Accepted : 2012.06.15
  • Published : 2012.06.30
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Abstract

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 $200mV\;s^{-1}$) are emphasized to be capable of utilizing adequately the high power capability of supercapacitor. As a result, the PANI electrode by the electrodeposition shows superior specific capacitance (max. $474F\;g^{-1}$ at $10mV\;s^{-1}$ and about $390F\;g^{-1}$ at $500mV\;s^{-1}$) 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.

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