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Cation coordination in ion-conducting gels based on PEO-grafted polymers

Adebahr, Josefina; Gavelin, Patrik LU ; Jannasch, Patric LU ; Ostrovskii, Denis; Wesslén, Bengt LU and Jacobsson, Per (2000) In Solid State Ionics 135(1-4). p.149-154
Abstract
Ionic conducting polymer gels prepared from PEG-grafted acrylates, ethylene carbonate (EC), dimethyl carbonate (DMC), and LiPF6 are studied by means of infrared and Raman spectroscopy. It is found that the presence of grafted PEO chains substantially changes the coordination of lithium cations from 'cation-solvent' to 'cation-polymer'. Spectroscopic studies show that Li+-PEO coordination is strongly favored in competition with the solvent molecules and dominates completely at ether oxygen to Li-cation ratios (O:Li) of 10:1 and 5:1. At an O:M of 4:1 a solvent-cation interaction arises, in agreement with previously reported MD calculations of a preferred coordination number of 5 in similar systems. The results suggest that the complex... (More)
Ionic conducting polymer gels prepared from PEG-grafted acrylates, ethylene carbonate (EC), dimethyl carbonate (DMC), and LiPF6 are studied by means of infrared and Raman spectroscopy. It is found that the presence of grafted PEO chains substantially changes the coordination of lithium cations from 'cation-solvent' to 'cation-polymer'. Spectroscopic studies show that Li+-PEO coordination is strongly favored in competition with the solvent molecules and dominates completely at ether oxygen to Li-cation ratios (O:Li) of 10:1 and 5:1. At an O:M of 4:1 a solvent-cation interaction arises, in agreement with previously reported MD calculations of a preferred coordination number of 5 in similar systems. The results suggest that the complex interactions which determine long time stability and ionic transport properties can be designed by functionalization of the polymer backbone in PMMA-based gel electrolytes. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Solid State Ionics
volume
135
issue
1-4
pages
149 - 154
publisher
Elsevier
external identifiers
  • scopus:0034323034
ISSN
0167-2738
DOI
10.1016/S0167-2738(00)00294-0
language
English
LU publication?
yes
id
9576441f-b64c-46de-9e6c-bc45fb6cfb8c (old id 150765)
date added to LUP
2007-06-26 08:55:10
date last changed
2017-10-22 03:54:56
@article{9576441f-b64c-46de-9e6c-bc45fb6cfb8c,
  abstract     = {Ionic conducting polymer gels prepared from PEG-grafted acrylates, ethylene carbonate (EC), dimethyl carbonate (DMC), and LiPF6 are studied by means of infrared and Raman spectroscopy. It is found that the presence of grafted PEO chains substantially changes the coordination of lithium cations from 'cation-solvent' to 'cation-polymer'. Spectroscopic studies show that Li+-PEO coordination is strongly favored in competition with the solvent molecules and dominates completely at ether oxygen to Li-cation ratios (O:Li) of 10:1 and 5:1. At an O:M of 4:1 a solvent-cation interaction arises, in agreement with previously reported MD calculations of a preferred coordination number of 5 in similar systems. The results suggest that the complex interactions which determine long time stability and ionic transport properties can be designed by functionalization of the polymer backbone in PMMA-based gel electrolytes.},
  author       = {Adebahr, Josefina and Gavelin, Patrik and Jannasch, Patric and Ostrovskii, Denis and Wesslén, Bengt and Jacobsson, Per},
  issn         = {0167-2738},
  language     = {eng},
  number       = {1-4},
  pages        = {149--154},
  publisher    = {Elsevier},
  series       = {Solid State Ionics},
  title        = {Cation coordination in ion-conducting gels based on PEO-grafted polymers},
  url          = {http://dx.doi.org/10.1016/S0167-2738(00)00294-0},
  volume       = {135},
  year         = {2000},
}