TY - JOUR
T1 - Facile coating of poly(3,4-ethylenedioxythiophene) on manganese dioxide by galvanic displacement reaction and its electrochemical properties for electrochemical capacitors
AU - Kim, Kwang Heon
AU - Kim, Ji Young
AU - Kim, Kwang Bum
PY - 2012/8/20
Y1 - 2012/8/20
N2 - 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.
AB - 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.
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U2 - 10.5012/bkcs.2012.33.8.2529
DO - 10.5012/bkcs.2012.33.8.2529
M3 - Article
AN - SCOPUS:84865246460
VL - 33
SP - 2529
EP - 2534
JO - Bulletin of the Korean Chemical Society
JF - Bulletin of the Korean Chemical Society
SN - 0253-2964
IS - 8
ER -