Facile Coating of Poly(3,4-ethylenedioxythiophene) on Manganese Dioxide by Galvanic Displacement Reaction and Its Electrochemical Properties for Electrochemical Capacitors

Bulletin of the Korean chemical society

Kwang-Bum Kim¹  Kwang-Heon Kim¹  Ji-Young Kim¹ 

关键词: MnO2;    PEDOT;    Galvanic displacement reaction;    Electrochemical capacitor;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Poly(3,4-ethylenedioxythiophene) coated Manganese Dioxide (PEDOT/MnO2) composite electrode was fabricated by simply immersing the MnO2 electrode in an acidic aqueous solution containing 3,4- ethylenedioxythiophene (EDOT) monomers. Analysis of open-circuit potential of the MnO2 electrode in the solution indicates the reduction of outer surface of MnO2 to dissolved Mn2+ ions and simultaneously oxidation of EDOT monomer to PEDOT on the MnO2 surface to form a PEDOT shell via a galvanic displacement reaction. Analysis of cyclic voltammograms and specific capacitance of the PEDOT/MnO2, conductive carbon added MnO2 and conductive carbon added PEDOT/MnO2 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 MnO2 acts to increase the active reaction site of MnO2.

【 授权许可】

Unknown