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Electrochromic devices operating with electrolytes based on boronate ester compounds and various alkali metal salts

Pennarun, Pierre-Yves LU ; Papaefthimiou, Spiros; Yianoulis, Panayiotis and Jannasch, Patric LU (2007) In Solar Energy Materials and Solar Cells 91(4). p.330-341
Abstract
Various polymer electrolytes based on boronate esters and different lithium and sodium salts have been evaluated in electrochromic (EC) devices based on WO3 films. The results showed that the ionic conductivity of the electrolytes was not the most important parameter for the colouration performance of these devices. The use of solid electrolytes containing LiClO4 resulted in a higher colouration performance than the corresponding liquid electrolytes, even though the latter exhibited a significantly higher conductivity. The results also showed that the transfer process at the interface between the WO3 layer and the electrolyte played a major role for the colouration process. The presence of Lewis acidic boronate ester groups in the... (More)
Various polymer electrolytes based on boronate esters and different lithium and sodium salts have been evaluated in electrochromic (EC) devices based on WO3 films. The results showed that the ionic conductivity of the electrolytes was not the most important parameter for the colouration performance of these devices. The use of solid electrolytes containing LiClO4 resulted in a higher colouration performance than the corresponding liquid electrolytes, even though the latter exhibited a significantly higher conductivity. The results also showed that the transfer process at the interface between the WO3 layer and the electrolyte played a major role for the colouration process. The presence of Lewis acidic boronate ester groups in the electrolytes significantly improved the performance of the EC devices. The incorporation of boron in the composition of the electrolytes allowed the use of solid electrolytes instead of liquid ones, thus avoiding leakage problems. Furthermore, the highest colouration performance was found in EC devices operating with inexpensive salts. Because of their poor stability, the electrolytes based on LiCl and LiBr were not suitable, while those incorporating LiClO4 salt exhibited excellent overall characteristics. (Less)
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author
organization
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Contribution to journal
publication status
published
subject
keywords
salt dissociation, interfacial transfer, interfacial stabilisation, electrochromic devices, polymer electrolytes
in
Solar Energy Materials and Solar Cells
volume
91
issue
4
pages
330 - 341
publisher
Elsevier
external identifiers
  • wos:000243625500014
  • scopus:33845293782
ISSN
0927-0248
DOI
10.1016/j.solmat.2006.09.009
language
English
LU publication?
yes
id
0435447b-669f-4b33-ae01-6d2051c7ad69 (old id 163592)
alternative location
http://www.sciencedirect.com.ludwig.lub.lu.se/science?_ob=ArticleURL&_udi=B6V51-4MCW9RV-1&_user=745831&_coverDate=02%2F15%2F2007&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000041498&_version=1&_urlVersion=0&_userid=745831&md5=477a4f8d01c0669a201593cf0fb58b10
date added to LUP
2007-07-13 15:36:03
date last changed
2017-01-01 06:39:17
@article{0435447b-669f-4b33-ae01-6d2051c7ad69,
  abstract     = {Various polymer electrolytes based on boronate esters and different lithium and sodium salts have been evaluated in electrochromic (EC) devices based on WO3 films. The results showed that the ionic conductivity of the electrolytes was not the most important parameter for the colouration performance of these devices. The use of solid electrolytes containing LiClO4 resulted in a higher colouration performance than the corresponding liquid electrolytes, even though the latter exhibited a significantly higher conductivity. The results also showed that the transfer process at the interface between the WO3 layer and the electrolyte played a major role for the colouration process. The presence of Lewis acidic boronate ester groups in the electrolytes significantly improved the performance of the EC devices. The incorporation of boron in the composition of the electrolytes allowed the use of solid electrolytes instead of liquid ones, thus avoiding leakage problems. Furthermore, the highest colouration performance was found in EC devices operating with inexpensive salts. Because of their poor stability, the electrolytes based on LiCl and LiBr were not suitable, while those incorporating LiClO4 salt exhibited excellent overall characteristics.},
  author       = {Pennarun, Pierre-Yves and Papaefthimiou, Spiros and Yianoulis, Panayiotis and Jannasch, Patric},
  issn         = {0927-0248},
  keyword      = {salt dissociation,interfacial transfer,interfacial stabilisation,electrochromic devices,polymer electrolytes},
  language     = {eng},
  number       = {4},
  pages        = {330--341},
  publisher    = {Elsevier},
  series       = {Solar Energy Materials and Solar Cells},
  title        = {Electrochromic devices operating with electrolytes based on boronate ester compounds and various alkali metal salts},
  url          = {http://dx.doi.org/10.1016/j.solmat.2006.09.009},
  volume       = {91},
  year         = {2007},
}