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Stable Deep Doping of Vapor-Phase Polymerized Poly(3,4-ethylenedioxythiophene)/Ionic Liquid Supercapacitors

journal contribution
posted on 2016-01-01, 00:00 authored by C Karlsson, J Nicholas, D Evans, Maria ForsythMaria Forsyth, M Strømme, M Sjödin, Patrick HowlettPatrick Howlett, Cristina Pozo-GonzaloCristina Pozo-Gonzalo
Liquid-solution polymerization and vapor-phase polymerization (VPP) have been used to manufacture a series of chloride- and tosylate-doped poly(3,4-ethylenedioxythiophene) (PEDOT) carbon paper electrodes. The electrochemistry, specific capacitance, and specific charge were determined for single electrodes in 1-ethyl-3-methylimidazolium dicyanamide (emim dca) ionic liquid electrolyte. VPP-PEDOT exhibits outstanding properties with a specific capacitance higher than 300 F g(-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 F g(-1) ) and high specific energy (19.8 Wh kg(-1) ). A Ragone plot shows that the VPP-PEDOT cells combine the high specific power of conventional ("pure") capacitors with the high specific energy of batteries, a highly sought-after target for energy storage.

History

Journal

ChemSusChem

Volume

9

Pagination

2112-2121

Location

Germany

Open access

  • Yes

ISSN

1864-5631

eISSN

1864-564X

Language

English

Publication classification

C Journal article, C1 Refereed article in a scholarly journal

Copyright notice

2016, Wiley-VCH

Issue

16

Publisher

WILEY-V C H VERLAG GMBH