Effect of the Linker in Terephthalate-Functionalized Conducting Redox Polymers

Li Yang, Xiao Huang, Adolf Gogoll, Maria Strømme, Martin Sjödin

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The combination of high capacity redox active pendent groups and conducting polymers, realized in conducting redox polymers (CRPs), provides materials with high charge storage capacity that are electronically conducting which makes CRPs attractive for electrical energy storage applications. In this report, six polythiophene and poly(3,4-ethylenedioxythiophene)(PEDOT)-based CRPs with a diethyl terephthalate unit covalently bound to the polymer chain by various linkers have been synthesized and characterized electrochemically. The effects of the choice of polymer backbone and of the nature of the link on the electrochemistry, and in particular the cycling stability of these polymers, are discussed. All CRPs show both the doping of the polymer backbone as well as the redox behavior of the pendent groups and the redox potential of the pendent groups in the CRPs is close to that of corresponding monomer, indicating insignificant interaction between the pendant and the polymer backbone. While all CRPs show various degrees of charge decay upon electrochemical redox conversion, the PEDOT-based CRPs show significantly improved stability compared to the polythiophene counterparts. Moreover, we show that by the right choice of link the cycling stability of diethyl terephthalate substituted PEDOT-based CRPs can be significantly improved.

Original languageEnglish
Pages (from-to)149-155
Number of pages7
JournalElectrochimica Acta
Volume222
DOIs
Publication statusPublished - 2016 Dec 20
Externally publishedYes

Keywords

  • conducting redox polymers
  • PEDOT
  • polythiophene
  • terephthalate

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

Fingerprint Dive into the research topics of 'Effect of the Linker in Terephthalate-Functionalized Conducting Redox Polymers'. Together they form a unique fingerprint.

  • Cite this