Abstract
Ionic conductivity values for LiSO 3CF 3 complexes with two amorphous poly(methoxy polyethylene glycol monomethacrylates) (PEM) were determined and values as high as ∼6 × 10 −4 Ω −1 cm −1 at 373 K and ∼2 × 10 −5 Ω −1 cm −1 at 293 K were achieved. These values are compared with those obtained for a poly(ethylene oxide) (PEO)-LiSO 3CF 3 complex of similar salt concentration with an ether oxygen to Li + ion ratio of 18. The conductivity results for the complexes are similar at temperatures >343 K but at 293 K the values for the conductivities of the PEM-LiSO 3CF 3 complexes are approximately two orders of magnitude higher than those for the PEO-LiSO 3CF 3 complex. This difference is believed to be due at least in part to the presence of a large amount of crystalline material in the PEO-LiSO 3CF 3 complex below 323 K.
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