Oxidation of a PPy‐modified tantalum electrode

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

doi:10.1002/pat.1993.220040502

Oxidation of a PPy‐modified tantalum electrode

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	329-334
Number of pages	6
Journal	Polymers for Advanced Technologies
Volume	4
Issue number	5
DOIs	https://doi.org/10.1002/pat.1993.220040502
Publication status	Published - 1993

Keywords

Capacitor
Electropolymerization
Galvanostatic electrolysis
Polypyrrole
Tantalum oxide

ASJC Scopus subject areas

Polymers and Plastics

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10.1002/pat.1993.220040502

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title = "Oxidation of a PPy‐modified tantalum electrode",

abstract = "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.",

keywords = "Capacitor, Electropolymerization, Galvanostatic electrolysis, Polypyrrole, Tantalum oxide",

author = "Park, {Young‐Seo ‐S} and Kimihisa Yamamoto and Shinji Takeoka and Tomoyuki Ohta and Eishun Tsuchida",

year = "1993",

doi = "10.1002/pat.1993.220040502",

language = "English",

volume = "4",

pages = "329--334",

journal = "Polymers for Advanced Technologies",

issn = "1042-7147",

publisher = "John Wiley and Sons Ltd",

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TY - JOUR

T1 - Oxidation of a PPy‐modified tantalum electrode

AU - Park, Young‐Seo ‐S

AU - Yamamoto, Kimihisa

AU - Takeoka, Shinji

AU - Ohta, Tomoyuki

AU - Tsuchida, Eishun

PY - 1993

Y1 - 1993

N2 - 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.

AB - 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.

KW - Capacitor

KW - Electropolymerization

KW - Galvanostatic electrolysis

KW - Polypyrrole

KW - Tantalum oxide

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DO - 10.1002/pat.1993.220040502

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EP - 334

JO - Polymers for Advanced Technologies

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IS - 5

ER -

Oxidation of a PPy‐modified tantalum electrode

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Keywords

ASJC Scopus subject areas

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