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Ion and solvent dynamics in gel electrolytes based on ethylene oxide grafted acrylate polymers

Adebahr, J; Forsyth, M; Gavelin, Patrik LU ; Jacobsson, P and Oradd, G (2002) In The Journal of Physical Chemistry Part B 106(47). p.12119-12123
Abstract
Multinuclear pulsed field gradient NMR measurements and theological viscosity measurements were performed on three series of polymer gel electrolytes. The gels were based on a lithium salt electrolyte swollen into a copolymer matrix comprising an acrylate backbone and ethylene oxide side chains. In each series the side chains differed in length and number, but the acrylate-to-ethylene oxide ratio was kept constant. It was found that the self-diffusion coefficient of the cations was much lower than that of the anions, and that it decreased rapidly when the side chains got longer. In contrast, the self-diffusion coefficient of the anions was found to be independent of chain length. In the gel electrolytes, the diffusion coefficients of the... (More)
Multinuclear pulsed field gradient NMR measurements and theological viscosity measurements were performed on three series of polymer gel electrolytes. The gels were based on a lithium salt electrolyte swollen into a copolymer matrix comprising an acrylate backbone and ethylene oxide side chains. In each series the side chains differed in length and number, but the acrylate-to-ethylene oxide ratio was kept constant. It was found that the self-diffusion coefficient of the cations was much lower than that of the anions, and that it decreased rapidly when the side chains got longer. In contrast, the self-diffusion coefficient of the anions was found to be independent of chain length. In the gel electrolytes, the diffusion coefficients of the solvent molecules are relatively constant despite an increased viscosity with increasing length of the side chains. However, in saltfree gels made for comparison, the diffusion coefficients of the solvent molecules decreased with, increasing length of the side chains, which is consistent with an increased viscosity. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
The Journal of Physical Chemistry Part B
volume
106
issue
47
pages
12119 - 12123
publisher
The American Chemical Society
external identifiers
  • wos:000179543800006
  • scopus:0037191893
ISSN
1520-5207
DOI
10.1021/jp013819n
language
English
LU publication?
yes
id
f1a6e642-9877-464b-8d51-ee2488e20b7c (old id 322341)
date added to LUP
2007-08-03 14:56:26
date last changed
2017-01-01 06:57:28
@article{f1a6e642-9877-464b-8d51-ee2488e20b7c,
  abstract     = {Multinuclear pulsed field gradient NMR measurements and theological viscosity measurements were performed on three series of polymer gel electrolytes. The gels were based on a lithium salt electrolyte swollen into a copolymer matrix comprising an acrylate backbone and ethylene oxide side chains. In each series the side chains differed in length and number, but the acrylate-to-ethylene oxide ratio was kept constant. It was found that the self-diffusion coefficient of the cations was much lower than that of the anions, and that it decreased rapidly when the side chains got longer. In contrast, the self-diffusion coefficient of the anions was found to be independent of chain length. In the gel electrolytes, the diffusion coefficients of the solvent molecules are relatively constant despite an increased viscosity with increasing length of the side chains. However, in saltfree gels made for comparison, the diffusion coefficients of the solvent molecules decreased with, increasing length of the side chains, which is consistent with an increased viscosity.},
  author       = {Adebahr, J and Forsyth, M and Gavelin, Patrik and Jacobsson, P and Oradd, G},
  issn         = {1520-5207},
  language     = {eng},
  number       = {47},
  pages        = {12119--12123},
  publisher    = {The American Chemical Society},
  series       = {The Journal of Physical Chemistry Part B},
  title        = {Ion and solvent dynamics in gel electrolytes based on ethylene oxide grafted acrylate polymers},
  url          = {http://dx.doi.org/10.1021/jp013819n},
  volume       = {106},
  year         = {2002},
}