Electrochemical Impedance Analysis of Polyaniline-Film on Platinum Electrodes

백금 전극에 입힌 폴리아닐린의 전기화학적 임피던스

  • 천정균 (한국외국어대학교 자연과학대학 화학과) ;
  • 민병훈 (동양화학주식회사 중앙연구소)
  • Published : 19950900


The electrochemical impedance spectra of polyaniline film prepared by cyclic voltammetry have been investigated in 0.1 M aqueous sulfuric acid solution. Charge transfer resistances were rather low at the oxidized states in agreement with the conductive behavior reported at these potentials. The corresponding exchange current densities were very high. Large values of capacitance associated with the polymer have been found which vary as a function of the electrode potentials. An equivalent electrical circuit has been deduced from the impedance data. It was therefore possible to obtain the parameters of the ionic mass transport within the film.



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