Potential Tuning in Quinone-pyrrole Dyad Based Conducting Redox Polymers
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In this study, conducting redox polymers (CRPs), which consist of a polypyrrole conducting polymer (CP) backbone with attached quinone pendant groups (PGs), have been explored as electrode materials for organic batteries. A modular organic synthetic approach allows the assembly of the pyrrole and quinone units into quinone-pyrrole dyads. These dyad monomers were copolymerized electrochemically with pyrrole to yield the CRPs. DFT calculations were used to predict the formal potentials of the dyads, showing excellent agreement with the experimental values of the corresponding CRPs. Moreover, it is shown that the matching between the redox potential of PGs and the conductive region of CPs is an absolute requirement for good performance of these materials. With access to CRP materials with varying quinone formal potentials a prototype of a full organic based battery was constructed by choosing two CRPs with different quinone potentials. A galvanostatic charge-discharge study showed that the cell potentials coincided well with the difference in redox potential between the quinone substituents used in the anode and cathode CRP.
Nano Technology Organic Chemistry
IdentifiersURN: urn:nbn:se:uu:diva-316491OAI: oai:DiVA.org:uu-316491DiVA: diva2:1077953