Abstract
AbstractIn monoconducting gel electrolytes prepared from polymeric lithium salt, poly(ethylene glycol), dimethylsulfoxide or propylene carbonate 7Li(I= 3/2) NMR spin‐lattice relaxation times (T1) at two resonance frequencies (24.5 and 77.5 MHz) have been measured for various compositions of the above system over the temperature region 0.75 to 2 Tg, with the glass transition temperature T″g≈200 K. The T1 data as a function of inverse temperature exhibit a cationic diffusion‐induced minimum. Both the temperature and the frequency of T1, indicate a change in the dynamical process at about 1.3 Tg.
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