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Ion- and Electron Transport in Pyrrole/Quinone Conducting Redox Polymers Investigated by In Situ Conductivity Methods
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.ORCID iD: 0000-0002-5496-9664
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC, Synthetical Organic Chemistry.
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2015 (English)In: Electrochimica Acta, ISSN 0013-4686, E-ISSN 1873-3859, Vol. 179, 336-342 p.Article in journal (Refereed) Published
Abstract [en]

Polypyrrole functionalized with redox active pendant groups constitutes a so called conducting redox polymer, and functions both as a conducting polymer and as a redox polymer. The electrochemical response reveals capacitive charging of the conducting backbone as well as redox cycling of the pendant groups. While the backbone provides an electrically conducting matrix for fast electron transport through the material, the pendant groups offer a large charge storage capacity, much greater than that of polypyrrole itself. We have investigated such polypyrrole-hydroquinone conducting redox polymers, with focus on their in situ conductivity during electrochemical cycling, in order to understand the charge transport mechanisms in this type of system. The most notable feature is that oxidation of the pendant groups leads to a large decrease in the polymer conductivity. The causes of this phenomenon are discussed, as well as the rate limitations of fast redox cycling of the polymer, which are investigated through a combination of bipotentiostat cyclic voltammetry and potential steps of polymer films on interdigitated array electrodes.

Place, publisher, year, edition, pages
2015. Vol. 179, 336-342 p.
Keyword [en]
In situ conductivity, conducting polymers, redox polymers, polypyrrole, rate limitations
National Category
Nano Technology
Research subject
Engineering Science with specialization in Nanotechnology and Functional Materials
Identifiers
URN: urn:nbn:se:uu:diva-248597DOI: 10.1016/j.electacta.2015.02.193ISI: 000362292200042OAI: oai:DiVA.org:uu-248597DiVA: diva2:800162
Funder
Swedish Foundation for Strategic Research Carl Tryggers foundation Swedish Energy Agency
Available from: 2015-04-01 Created: 2015-04-01 Last updated: 2017-12-04Bibliographically approved

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Publisher's full texthttp://www.sciencedirect.com/science/article/pii/S0013468615005149

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Karlsson, ChristofferHuang, HaoStrömme, MariaGogoll, AdolfSjödin, Martin

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