Activation Barriers Provide Insight into the Mechanism of Self-Discharge in Polypyrrole
2014 (English)In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 118, no 51, 29643-29649 p.Article in journal (Refereed) Published
Conducting polymers are envisioned to play a significant role in the development of organic matter based electrical energy conversion and storage systems. However, successful utilization of conducting polymers relies on a fundamental understanding of their inherent possibilities and limitations. In this report we studied the temperature dependence of the self-discharge in polypyrrole and show that the rate of self-discharge is kinetically controlled by a polymer intrinsic endergonic electron transfer reaction forming a reactive intermediate. We further show that this intermediate is intimately linked to a process known as overoxidation. This process is general for most, if not all, p-doped conducting polymers irrespective of medium. The results herein are therefore expected to significantly impact the development of future energy storage systems with conducting polymer based components.
Place, publisher, year, edition, pages
2014. Vol. 118, no 51, 29643-29649 p.
Physical Chemistry Engineering and Technology
IdentifiersURN: urn:nbn:se:uu:diva-243681DOI: 10.1021/jp510690pISI: 000347360200021OAI: oai:DiVA.org:uu-243681DiVA: diva2:789604