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Conductivity and NMR properties of plasticized polyethers complexed with lithium salts

journal contribution
posted on 01.07.1996, 00:00 authored by Maria ForsythMaria Forsyth, M Garcia, D MacFarlane, S Ng, M Smith, J Strange
NMR provides a tool whereby the dynamic properties of specific nuclei can be investigated. In the present study, a poly(ethylene oxide-co-propylene oxide) network has been used as the polymer host to prepare solid polymer electrolytes (SPE) containing either LiClO4 or LiCF3SO3. In addition, a low molecular weight plasticizer [propylene carbonate (PC), dimethyl formamide (DMF) or tetraglyme] has been added to several of the samples to enhance the mobility of the polymer and, thus, of the ionic species. The effects of plasticizer and salt concentration on the ionic structure and mobility in these SPEs, as measured by NMR relaxation times, and correlation to the conductivity behaviour in these systems are discussed. Temperature dependent triflate diffusion coefficients, as measured by Pulsed Field Gradient 19F-NMR, in plasticized SPEs are also reported.

History

Journal

Solid state ionics

Volume

86-88

Issue

Part 2

Pagination

1365 - 1370

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

1996, Elsevier Science B.V.