Exploring the Redox Behavior of Quinone in Conducting Redox Polymers
2016 (English)Conference paper, Poster (Refereed)
Quinones have been suggested as alternative electrodes materials in battery applications for their attractive redox chemistry on the ketone groups where oxidation/reduction reaction occurs at well-defined potential. By attaching quinone onto a conducting polymer (CP) backbone e.g polypyrrole, a conducting redox polymer was constructed, which is expected to offer solutions for the general drawbacks of using small electro-active molecules in a battery system, e.g. dissolution in electrolyte which causes capacity fading and slow kinetics due to limitad electronic conductivities. With substitution on the quinones, the potential for the redox reaction can be tuned. A series of monomers with various functional groups on the quinone ring which is covalently linked to pyrrole was synthesized. DFT calculations were performed to predict the potentials for the candidates and to further understand the redox properties of the molecules at electronic level. All the monomers were electrochemically co-polymerized with pyrrole and the resulting polymers were studied by electrochemical in order to obtain the redox characteristics of the co-polymers. Comparison of computational results and experimental results for the redox potential were made and more insight of modulating the quinone unit was gained for further molecular design in the quinone-based electrode materials.
Place, publisher, year, edition, pages
IdentifiersURN: urn:nbn:se:uu:diva-297036OAI: oai:DiVA.org:uu-297036DiVA: diva2:940555
Electronic Processes in Organic Materials Gordon Research Conference