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7Li NMR measurements of polymer gel electrolytes

journal contribution
posted on 01.04.2002, 00:00 authored by J Adebahr, Maria ForsythMaria Forsyth, D MacFarlane, P Gavelin, P Jacobsson
Ion conducting polymer gels prepared from (ethylene oxide)n grafted methacrylates, ethylene carbonate (EC), gamma butyrolactone (gBL), and lithium hexafluorophosphate are studied by means of nuclear magnetic resonance spectroscopy. This study shows that there are at least two possible lithium sites with different mobility. The lithium-ions with lower mobility dominate at room temperature, but this is changed as the temperature is increased. The NMR results also show that the 7Li spin–spin relaxation time decreases with increasing length of the grafted ethylene oxide side chains, indicating a stronger interaction between the polymer and the Li-ions, and hence, a lower mobility of the Li-ions.

History

Journal

Solid state ionics

Volume

147

Issue

3-4

Pagination

303 - 307

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

0167-2738

eISSN

1872-7689

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2002, Elsevier Science B.V.