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Extraordinarily Efficient Conduction in a Redox-Active Ionic Liquid

Thorsmolle, Verner K.; Rothenberger, Guido; Topgaard, Daniel LU ; Brauer, Jan C.; Kuang, Dai-Bin; Zakeeruddin, Shaik M.; Lindman, Björn LU ; Graetzel, Michael and Moser, Jacques-E. (2011) In ChemPhysChem 12(1). p.145-149
Abstract
Iodine added to iodide-based ionic liquids leads to extraordinarily efficient charge transport, vastly exceeding that expected for such viscous systems. Using terahertz time-domain spectroscopy, in conjunction with dc conductivity, diffusivity and viscosity measurements we unravel the conductivity pathways in 1-methyl-3-propylimidazolium iodide melts. This study presents evidence of the Grotthuss mechanism as a significant contributor to the conductivity, and provides new insights into ion pairing processes as well as the formation of polyiodides. The terahertz and transport results are reunited in a model providing a quantitative description of the conduction by physical diffusion and the Grotthuss bond-exchange process. These novel... (More)
Iodine added to iodide-based ionic liquids leads to extraordinarily efficient charge transport, vastly exceeding that expected for such viscous systems. Using terahertz time-domain spectroscopy, in conjunction with dc conductivity, diffusivity and viscosity measurements we unravel the conductivity pathways in 1-methyl-3-propylimidazolium iodide melts. This study presents evidence of the Grotthuss mechanism as a significant contributor to the conductivity, and provides new insights into ion pairing processes as well as the formation of polyiodides. The terahertz and transport results are reunited in a model providing a quantitative description of the conduction by physical diffusion and the Grotthuss bond-exchange process. These novel results are important for the fundamental understanding of conduction in molten salts and for applications where ionic liquids are used as charge-transporting media such as in batteries and dye-sensitized solar cells. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
electrolyte, conducting materials, ion pairs, ionic liquids, terahertz, spectroscopy
in
ChemPhysChem
volume
12
issue
1
pages
145 - 149
publisher
John Wiley & Sons
external identifiers
  • wos:000286441700024
  • scopus:78651425238
ISSN
1439-7641
DOI
10.1002/cphc.201000819
language
English
LU publication?
yes
id
8cf550f9-ebac-4cd1-b64b-e5fdc2a8a31e (old id 1790807)
date added to LUP
2011-03-02 14:38:46
date last changed
2017-11-12 03:15:15
@article{8cf550f9-ebac-4cd1-b64b-e5fdc2a8a31e,
  abstract     = {Iodine added to iodide-based ionic liquids leads to extraordinarily efficient charge transport, vastly exceeding that expected for such viscous systems. Using terahertz time-domain spectroscopy, in conjunction with dc conductivity, diffusivity and viscosity measurements we unravel the conductivity pathways in 1-methyl-3-propylimidazolium iodide melts. This study presents evidence of the Grotthuss mechanism as a significant contributor to the conductivity, and provides new insights into ion pairing processes as well as the formation of polyiodides. The terahertz and transport results are reunited in a model providing a quantitative description of the conduction by physical diffusion and the Grotthuss bond-exchange process. These novel results are important for the fundamental understanding of conduction in molten salts and for applications where ionic liquids are used as charge-transporting media such as in batteries and dye-sensitized solar cells.},
  author       = {Thorsmolle, Verner K. and Rothenberger, Guido and Topgaard, Daniel and Brauer, Jan C. and Kuang, Dai-Bin and Zakeeruddin, Shaik M. and Lindman, Björn and Graetzel, Michael and Moser, Jacques-E.},
  issn         = {1439-7641},
  keyword      = {electrolyte,conducting materials,ion pairs,ionic liquids,terahertz,spectroscopy},
  language     = {eng},
  number       = {1},
  pages        = {145--149},
  publisher    = {John Wiley & Sons},
  series       = {ChemPhysChem},
  title        = {Extraordinarily Efficient Conduction in a Redox-Active Ionic Liquid},
  url          = {http://dx.doi.org/10.1002/cphc.201000819},
  volume       = {12},
  year         = {2011},
}