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A 13C NMR study of the role of plasticizers in the conduction mechanism of solid polymer electrolytes

journal contribution
posted on 01.10.1995, 00:00 authored by Maria ForsythMaria Forsyth, P Meakin, D MacFarlane
The addition of low molecular weight solvents such as dimethyl formamide (DMF) and propylene carbonate (PC) to urethane crosslinked polyethers results in enhancement of polymer segmental motion, as determined in this work from polymer 13C spin lattice relaxation measurements (T1) and glass transition temperatures. The formation of salt-polyether complexes results in a decrease in T1, even in the presence of the plasticizer, indicating that the polymer ether molecules are still involved in the alkali metal coordination. In a polymer electrolyte containing 1 mol kg−1 LiClO4 the addition of DMF and PC have significantly different affects on the polymer mobility, although they both enhance the conductivity. The conductivity enhancement therefore is not solely the result of an increased solvent mobility.

History

Journal

Electrochimica acta

Volume

40

Issue

13-14

Pagination

2339 - 2342

Publisher

Elsevier Science Pub. Co.

Location

New York, N.Y.

ISSN

0013-4686

eISSN

1873-3859

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

1995, Elsevier Science Ltd.