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Characterization of PEDOT-Quinone Conducting Redox Polymers for Water Based Secondary Batteries
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials. (Nanoteknologi och funktionella material)ORCID iD: 0000-0002-0036-9911
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials. (Nanoteknologi och funktionella material)
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC, Organic Chemistry. (Organisk kemi gemensamt)
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC, Organic Chemistry. (Organisk kemi gemensamt)ORCID iD: 0000-0002-9092-261X
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2017 (English)In: Electrochimica Acta, ISSN 0013-4686, E-ISSN 1873-3859, Vol. 235, p. 356-364Article in journal (Refereed) Published
Abstract [en]

Lithium-ion technologies show great promise to meet the demands that the transition towards renewable energy sources and the electrification of the transport sector put forward. However, concerns regarding lithium-ion batteries, including limited material resources, high energy consumption during production, and flammable electrolytes, necessitate research on alternative technologies for electrochemical energy storage. Organic materials derived from abundant building blocks and with tunable properties, together with water based electrolytes, could provide safe, inexpensive and sustainable alternatives. In this study, two conducting redox polymers based on poly(3,4-ethylenedioxythiophene) (PEDOT) and a hydroquinone pendant group have been synthesized and characterized in an acidic aqueous electrolyte. The polymers were characterized with regards to kinetics, pH dependence, and mass changes during oxidation and reduction, as well as their conductance. Both polymers show redox matching, i.e. the quinone redox reaction occurs within the potential region where the polymer is conducting, and fast redox conversion that involves proton cycling during pendant group redox conversion. These properties make the presented materials promising candidates as electrode materials for water based all-organic batteries.

Place, publisher, year, edition, pages
2017. Vol. 235, p. 356-364
Keywords [en]
Conducting Redox Polymer, Quinone, Organic Batteries, Proton Batteries, Redox Matching
National Category
Nano Technology
Research subject
Engineering Science with specialization in Nanotechnology and Functional Materials
Identifiers
URN: urn:nbn:se:uu:diva-319049DOI: 10.1016/j.electacta.2017.03.068ISI: 000398330200042OAI: oai:DiVA.org:uu-319049DiVA, id: diva2:1085948
Funder
Swedish Foundation for Strategic Research Swedish Research CouncilCarl Tryggers foundation Swedish Energy AgencyEU, Horizon 2020, 644631Available from: 2017-03-30 Created: 2017-03-30 Last updated: 2019-05-09Bibliographically approved
In thesis
1. Electrochemical Characterizations of Conducting Redox Polymers: Electron Transport in PEDOT/Quinone Systems
Open this publication in new window or tab >>Electrochemical Characterizations of Conducting Redox Polymers: Electron Transport in PEDOT/Quinone Systems
2019 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Organic electrode materials for rechargeable batteries have caught increasing attention since they can be used in new innovative applications such as flexible electronics and smart fabrics. They can provide safer and more environmentally friendly devices than traditional batteries made from metals. Conducting polymers constitute an interesting class of organic electrode materials that have been thoroughly studied for battery applications. They have high conductivity but are heavy relative to their energy storage ability and will hence form batteries with low weight capacity. Quinones, on the other hand, are low weight molecules that participate in electron transport in both animals and plants. They could provide batteries with high capacity but are easily dissolved in the electrolyte and have low conductivity. These two constituents can be combined into a conducting redox polymer that has both high conductivity and high capacity. In the present work, the conducting polymer PEDOT and the simplest quinone, benzoquinone, are covalently attached and form the conducting redox polymer used for most studies in this thesis. The charge transport mechanism is investigated by in situ conductivity measurements and is found to mainly be governed by band transport. Other properties such as packing, kinetics, mass changes, and spectral changes are also studied. A polymerization technique is also analyzed, that allows for polymerization from a deposited layer. Lastly, two different types of batteries using conducting redox polymers are constructed. The thesis gives insight into the fundamental properties of conducting redox polymers and paves the way for the future of organic electronics.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2019. p. 59
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1819
Keywords
Conducting Redox Polymer, PEDOT, Quinone, Charge transport, Conductivity, Organic Battery
National Category
Nano Technology
Research subject
Engineering Science with specialization in Nanotechnology and Functional Materials
Identifiers
urn:nbn:se:uu:diva-383026 (URN)978-91-513-0674-2 (ISBN)
Public defence
2019-08-30, Häggsalen, 10132, Ångström, Lägerhyddsvägen 1, Uppsala, 09:15 (English)
Opponent
Supervisors
Available from: 2019-06-10 Created: 2019-05-09 Last updated: 2019-06-25

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Sterby, MiaEmanuelsson, RikardHuang, XiaoGogoll, AdolfStrömme, MariaSjödin, Martin

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