Raman characterization of pseudocapacitive behavior of polypyrrole on nanoporous gold

Y. Hou, L. Zhang, L. Y. Chen, P. Liu, A. Hirata, M. W. Chen

研究成果: Article査読

39 被引用数 (Scopus)

抄録

The practical applications of high-capacitance polypyrrole (PPy) as an active material for electrochemical supercapacitors are mainly limited by their poor cycling stability. By utilizing nanoporous gold enhanced Raman scattering of PPy, we investigated ex situ and in situ the structural origins of the low electrochemical stability of PPy. This study provided direct evidence that the stability degradation of PPy is caused by the irreversible transition between oxidation and reduction states of PPy, which is associated with the permanent deformation of PPy molecular chains subjected to applied potentials.

本文言語English
ページ(範囲)3523-3528
ページ数6
ジャーナルPhysical Chemistry Chemical Physics
16
8
DOI
出版ステータスPublished - 2014 2 28
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)
  • 物理化学および理論化学

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