Stable Deep Doping of Vapor-Phase Polymerized Poly(3,4-ethylenedioxythiophene)/Ionic Liquid Supercapacitors.
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.
Nanotechnology and Functional Materials, Department of Engineering Sciences, The Ångström Laboratory, Uppsala University, Box 534, SE-751 21, Uppsala, Sweden. Christoffer.Karlsson@Angstrom.uu.se.
Christoffer
0000-0003-2883-2696
C
Karlsson
Thin Film Coatings Group, Future Industries Institute, University of South Australia, Adelaide, South Australia, 5001, Australia.|Department of Chemistry, University of Bath, Bath, BA2 7AY, United Kingdom.
James
J
Nicholas
Thin Film Coatings Group, Future Industries Institute, University of South Australia, Adelaide, South Australia, 5001, Australia.
Drew
D
Evans
ARC Centre of Excellence for Electromaterials Science, Deakin University, Burwood, 3125, Australia.
Maria
M
Forsyth
Nanotechnology and Functional Materials, Department of Engineering Sciences, The Ångström Laboratory, Uppsala University, Box 534, SE-751 21, Uppsala, Sweden.
Maria
M
Strømme
Nanotechnology and Functional Materials, Department of Engineering Sciences, The Ångström Laboratory, Uppsala University, Box 534, SE-751 21, Uppsala, Sweden.
Martin
M
Sjödin
ARC Centre of Excellence for Electromaterials Science, Deakin University, Burwood, 3125, Australia.
Patrick C
PC
Howlett
ARC Centre of Excellence for Electromaterials Science, Deakin University, Burwood, 3125, Australia. cristina.pozo@deakin.edu.au.
Cristina
C
Pozo-Gonzalo
D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000737:chemistry*; D025802:Electric Capacitance; D017097:Electric Impedance; D004563:Electrochemistry; D004566:Electrodes; D052578:Ionic Liquids / Q000737:chemistry*; D058105:Polymerization; D011108:Polymers / Q000737:chemistry*; D014835:Volatilization
D019086:Bridged Bicyclo Compounds, Heterocyclic; D052578:Ionic Liquids; D011108:Polymers; C121383:poly(3,4-ethylene dioxythiophene)
doping; electrochemistry; ionic liquids; polymerization; polymers