Parallel mechanisms of polypyrrole self-discharge in aqueous media

H. Olsson, Z. Qiu, M. Strømme, M. Sjödin*

*この研究の対応する著者

研究成果: Article査読

5 被引用数 (Scopus)

抄録

In this report we investigate the self-discharge in a positively charged polypyrrole-cellulose composite material in water solution. Rate constants for the self-discharge reaction are determined by potential step methods and their dependence on pH, temperature and applied potential are reported. Based on the results, we propose that two fundamentally different self-discharge mechanisms operate in parallel; one of faradaic origin with a rate constant increasing exponentially with applied potential and one mechanism comprising an initial reaction of the charged polymer with hydroxide ions. The second mechanism dominates at high pH as the rate constant for this reaction increases exponentially with pH whilst the faradaic reaction dominates at low pH. With this report we hope to shed light on the complex and elusive nature of self-discharge in conducting polymers to serve as guidance for the construction of electrical energy storage devices with conducting polymer components.

本文言語English
ページ(範囲)11014-11019
ページ数6
ジャーナルPhysical Chemistry Chemical Physics
17
16
DOI
出版ステータスPublished - 2015 4月 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

フィンガープリント

「Parallel mechanisms of polypyrrole self-discharge in aqueous media」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル