Formation of PPy/Ta2O5/Ta structure by electropolymerization

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

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    Electropolymerization of pyrrole on tantalum (Ta) electrodes was carried out in buffer solutions (0.04 M phosphoric acid, 0.04 M acetic acid, 0.04 M boric acid and 0.2 M sodium hydroxide) containing 0.1 M sodium ptoluenesulfonate (TsONa) under galvanostatic conditions and it was found that a polypyrrole (PPy) and a tantalum oxide (Ta2O5) layer are formed on a Ta electrode by an electrochemical oxidation process. The conditions of this simultaneous formation were studied in respect to current density (id), pyrrole concentration ([Py]), pH and the amount of electricity. Under certain conditions ([Py] = 0.25 M, pH = 1.8, id = 10–20 mA cm−2, the amount of electricity = 1 C), 6–8 μm thick PPy films were efficiently formed on homogeneous 30–50 nm thick Ta2O5 layers. The PPy film showed a high electrical conductivity (110 s cm−1), adhered well and covered the Ta2O5 layer. The resulting PPy/Ta2O5/Ta system is therefore proved to have excellent properties as a capacitor.

    Original languageEnglish
    Pages (from-to)395-400
    Number of pages6
    JournalPolymers for Advanced Technologies
    Volume3
    Issue number7
    DOIs
    Publication statusPublished - 1992

    Fingerprint

    Tantalum
    Electropolymerization
    Polypyrroles
    Pyrroles
    Electricity
    Sodium
    Tantalum oxides
    Sodium Hydroxide
    Boric acid
    Electrodes
    Electrochemical oxidation
    Phosphoric acid
    Acetic acid
    Acetic Acid
    Buffers
    Capacitors
    Current density
    polypyrrole

    Keywords

    • Capacitor
    • Electropolymerization
    • Polypyrrole
    • p‐Toluenesulfonate
    • Tantalum oxide

    ASJC Scopus subject areas

    • Polymers and Plastics

    Cite this

    Formation of PPy/Ta2O5/Ta structure by electropolymerization. / Park, Young‐Seo ‐S; Takeoka, Shinji; Yamamoto, Kimihisa; Tsuchida, Eishun.

    In: Polymers for Advanced Technologies, Vol. 3, No. 7, 1992, p. 395-400.

    Research output: Contribution to journalArticle

    Park, Young‐Seo ‐S ; Takeoka, Shinji ; Yamamoto, Kimihisa ; Tsuchida, Eishun. / Formation of PPy/Ta2O5/Ta structure by electropolymerization. In: Polymers for Advanced Technologies. 1992 ; Vol. 3, No. 7. pp. 395-400.
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    AU - Yamamoto, Kimihisa

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