Matching Diethyl Terephthalate with n-Doped Conducting Polymers

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

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14 Citations (Scopus)

Abstract

The combination of small, high charge capacity molecules as pendant groups with a conducting polymer backbone having good electronic conductivity upon doping, gives the possibility to design a high capacity conducting redox polymer material for electric energy storage applications. The desired synergetic effect of the two components requires energy matching as well as chemical compatibility of the pendant group and the polymer backbone. Here we investigate the matching of diethyl terephthalate (DeT) with the thiophene-based conducting polymers polythiophene (PT), poly(3,4-ethylenedioxythiophene) (PEDOT), and polyphenylthiophene. We show that a stable and well-defined electrochemical response of DeT is achieved, together with all conducting polymers except for PT in tetrabutylammonium hexafluorophosphate electrolyte, indicating good energy match as well as chemical compatibility between DeT and polymers. By varying the size of ammonium cations in the electrolytes, we further show how this size affects the conductivity and the cycling stability of the polymers and also that the n-doping performance of all conducting polymers can be improved by the use of smaller alkyl ammonium cations. On the basis of these results, we suggest that PEDOT and PT are suitable candidates for a polymer backbone in conducting redox polymers with DeT pendant groups.

Original languageEnglish
Pages (from-to)18956-18963
Number of pages8
JournalJournal of Physical Chemistry C
Volume119
Issue number33
DOIs
Publication statusPublished - 2015 Aug 20
Externally publishedYes

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Surfaces, Coatings and Films
  • Physical and Theoretical Chemistry

Cite this

Yang, L., Huang, X., Gogoll, A., Strømme, M., & Sjödin, M. (2015). Matching Diethyl Terephthalate with n-Doped Conducting Polymers. Journal of Physical Chemistry C, 119(33), 18956-18963. https://doi.org/10.1021/acs.jpcc.5b05067