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

Adebahr, J., Forsyth, M., Gavelin, P., Jacobbson, P. and Orädd, G. 2002, Ion and solvent dynamics in gel electrolytes based on ethylene oxide grafted acrylate polymers, Journal of physical chemistry B : condensed matter, materials, surfaces, interfaces and biophysical, vol. 106, no. 47, pp. 12119-12123.

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Title Ion and solvent dynamics in gel electrolytes based on ethylene oxide grafted acrylate polymers
Author(s) Adebahr, J.
Forsyth, M.
Gavelin, P.
Jacobbson, P.
Orädd, G.
Journal name Journal of physical chemistry B : condensed matter, materials, surfaces, interfaces and biophysical
Volume number 106
Issue number 47
Start page 12119
End page 12123
Publisher American Chemical Society
Place of publication Washington, D.C.
Publication date 2002-11-01
ISSN 1520-6106
1520-5207
Summary Multinuclear pulsed field gradient NMR measurements and rheological 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 salt-free 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.
Language eng
Field of Research 039999 Chemical Sciences not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2002, American Chemical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030044

Document type: Journal Article
Collection: Institute for Technology Research and Innovation
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