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Side chain quinone redox reaction effects on conductivity of quinone-PEDOT based conducting redox polymer.
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: 0000-0002-4726-4121
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, Solid State Physics.ORCID iD: 0000-0002-5496-9664
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, Chemistry, Department of Photochemistry and Molecular Science.ORCID iD: 0000-0003-4126-4347
2019 (English)Conference paper, Poster (with or without abstract) (Other (popular science, discussion, etc.))
Abstract [en]

Conducting redox polymers (CRPs) have attracted increased interest in recent years due to the possibility of combining the favorable electron transport properties of conducting polymers with the additional functionality provided by the redox active pendent group (PG). Herein we present a series of quinone substituted PEDOT-CRPs where the quinone PGs have been substituted by electron-withdrawing substituents. As expected, introducing electron withdrawing substituents leads to an increase of the quinone formal potential making, for example, CF3-substituted CRPs a promising high-voltage cathode material for lithium ion batteries with a well-defined charge/discharge plateau around 3 V vs Li+/Li0 and 67% retention after 200 cycles. Interestingly, we find a shift in conductivity onset potential concomitant with the quinone formal potential shift indicating that the polymer backbone conductance is intimately associated with the PG redox chemistry. Through in-situ UV-vis, EPR and EQCM experiments as well as by experiments in lithium- and tert-butyl-ammonium based electrolyte we show that the conductance delay is caused by the reduced lithiated quinone state, most likely by localizing the polaron charge carrier as indicated by the EPR experiments.

Place, publisher, year, edition, pages
2019.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:uu:diva-397572OAI: oai:DiVA.org:uu-397572DiVA, id: diva2:1372079
Conference
organic battery days-2019
Available from: 2019-11-21 Created: 2019-11-21 Last updated: 2019-11-21

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Wang, Huan

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Wang, HuanEmanuelsson, RikardStrömme, MariaSjödin, Martin
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