Oxidation of a PPy‐modified tantalum electrode

Young‐Seo ‐S Park, Kimihisa Yamamoto, Shinji Takeoka, Tomoyuki Ohta, Eishun Tsuchida

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    A tantalum electrode on which polypyrrole (PPy) had been previously formed by electropolymerization was galvanostatically electrolyzed in an aqueous solution of 0.01 wt% phosphoric acid. This process contains the irreversible oxidation of a PPy film, the decomposition of solvent, and the formation of Ta2O5 by the reaction of OH coming through the PPy film, with Ta electrodes. A three layer‐structure (PPy/Ta2O5/Ta) was confirmed by electron spectroscopy for chemical analysis (ESCA). A PPy film containing CIO4 as dopant [PPy(CIO4 )] was significantly deteriorated in comparison with PPy(TsO) at the electrolysis. Therefore, the (PPy(TsO)/Ta2O5/Ta) system showed better electrical characteristics as a capacitor than the (PPy(CIO4 )/Ta2O5/Ta) system showed better electrical characteristics as a capacitor than the (PPy(ClO4 )/Ta2O5/Ta) system.

    元の言語English
    ページ(範囲)329-334
    ページ数6
    ジャーナルPolymers for Advanced Technologies
    4
    発行部数5
    DOI
    出版物ステータスPublished - 1993

    ASJC Scopus subject areas

    • Polymers and Plastics

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