A 7Li and 19F NMR relaxation study of LiCF 3SO 3 in plasticised solid polyether electrolytes

7Li and 19F NMR relaxation time ( T 1, T 2, T 1 ρ ) measurements have been used to probe the dynamics of LiCF 3SO 3 dissolved in an amorphous co-polymer poly(ethylene oxide-co-propylene oxide), and in particular the influence of the plasticising agents propylene carbonate and dimethyl formamide. The...

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Bibliographic Details
Published inSolid state nuclear magnetic resonance Vol. 5; no. 3; pp. 217 - 225
Main Authors Ali, F., Forsyth, M., Garcia, M.C., Smith, M.E., Strange, J.H.
Format Journal Article
LanguageEnglish
Published Elsevier Inc 1995
Subjects
Fluorine-19
Lithium triflate
Lithium-7
NMR relaxation
Polymer electrolyte
Polymer electrolyte
Lithium triflate
Fluorine-19
NMR relaxation
Lithium-7
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Summary:7Li and 19F NMR relaxation time ( T 1, T 2, T 1 ρ ) measurements have been used to probe the dynamics of LiCF 3SO 3 dissolved in an amorphous co-polymer poly(ethylene oxide-co-propylene oxide), and in particular the influence of the plasticising agents propylene carbonate and dimethyl formamide. The changes in relaxation behaviour of 19F and 7Li with increasing plasticiser concentration are very different, as is the effect of each plasticiser. These differences can be explained qualitatively in terms of the interaction between the plasticiser and the ions. Preliminary 7Li T 1 ρ measurements reveal two components at low temperatures.
ISSN:0926-2040
1527-3326
DOI:10.1016/0926-2040(95)01192-1