Abstract

Gel electrolyte films were prepared by a redox initiated copolymerization of oligo(ethylene glycol) 23 dimethacrylate and acrylonitrile in the presence of oligo(ethylene glycol) 11 dimethyl ether as a plasticizer and LiCF 3SO 3. The influence of the polar comonomer acrylonitrile on the conductivity and the cationic transference number was investigated. The materials show conductivities between 10 −4 and 10 −5 S cm and transference numbers in the range of 0.5 at room temperature. Pulsed field gradient-NMR (PFG-NMR) measurements were carried out to determine the diffusion coefficients of the plasticizer by 1H-NMR and of LiCF 3SO 3 by 19F-NMR.

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