Stable deep doping of vapor-phase polymerized poly(3,4-ethylenedioxythiophene)/ionic liquid supercapacitors

Christoffer Karlsson, James Nicholas, Drew Evans, Maria Forsyth, Maria Strømme, Martin Sjödin, Patrick C. Howlett, Cristina Pozo-Gonzalo

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20 Citations (Scopus)

Abstract

Liquid-solution polymerization and vapor-phase polymerization (VPP) have been used to manufacture a series of chloride- and tosylate-doped poly(3,4-ethylenedioxythiophen(PEDOT) carbon paper electrodes. The electrochemistry, specific capacitance, and specific charge were determined for single electrodes in 1-ethyl-3-methylimidazolium dicyanamide (emim dcionic liquid electrolyte. VPP-PEDOT exhibits outstanding properties with a specific capacitance higher than 300 Fg-1, the highest value reported for a PEDOT-based conducting polymer, and doping levels as high as 0.7 charges per monomer were achieved. Furthermore, symmetric PEDOT supercapacitor cells with the emim dca electrolyte exhibited a high specific capacitance (76.4 Fg-1) and high specific energy (19.8 Whkg-1). A Ragone plot shows that the VPP-PEDOTcells combine the high specific power of conventional (“pure”) capacitors with the high specific energy of batteries, a highly sought-after target for energy storage.

Original languageEnglish
Pages (from-to)2112-2121
Number of pages10
JournalChemSusChem
Volume9
Issue number16
DOIs
Publication statusPublished - 2016
Externally publishedYes

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Keywords

  • Doping
  • Electrochemistry
  • Ionic liquids
  • Polymerization
  • Polymers

ASJC Scopus subject areas

  • Environmental Chemistry
  • Chemical Engineering(all)
  • Materials Science(all)
  • Energy(all)

Cite this

Karlsson, C., Nicholas, J., Evans, D., Forsyth, M., Strømme, M., Sjödin, M., Howlett, P. C., & Pozo-Gonzalo, C. (2016). Stable deep doping of vapor-phase polymerized poly(3,4-ethylenedioxythiophene)/ionic liquid supercapacitors. ChemSusChem, 9(16), 2112-2121. https://doi.org/10.1002/cssc.201600333