Facile coating of poly(3,4-ethylenedioxythiophene) on manganese dioxide by galvanic displacement reaction and its electrochemical properties for electrochemical capacitors

Kwang Heon Kim, Ji Young Kim, Kwang Bum Kim

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Poly(3,4-ethylenedioxythiophene) coated Manganese Dioxide (PEDOT/MnO 2) composite electrode was fabricated by simply immersing the MnO 2 electrode in an acidic aqueous solution containing 3,4- ethylenedioxythiophene (EDOT) monomers. Analysis of open-circuit potential of the MnO 2 electrode in the solution indicates the reduction of outer surface of MnO 2 to dissolved Mn 2+ ions and simultaneously oxidation of EDOT monomer to PEDOT on the MnO 2 surface to form a PEDOT shell via a galvanic displacement reaction. Analysis of cyclic voltammograms and specific capacitance of the PEDOT/MnO 2, conductive carbon added MnO 2 and conductive carbon added PEDOT/MnO 2 electrodes suggests that the conductive carbon acted mainly to provide a continuous conducting path in the electrode to improve the rate capability and the PEDOT layer on MnO 2 acts to increase the active reaction site of MnO 2.

Original languageEnglish
Pages (from-to)2529-2534
Number of pages6
JournalBulletin of the Korean Chemical Society
Issue number8
Publication statusPublished - 2012 Aug 20


All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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