(WO9531835-A1)      Solid electrolyte for rechargeable lithium intercalation battery cell comprising a dissociable lithium salt dispersed in a polymeric matrix is claimed. The electrolyte comprises a self-supporting film of a copolymer of vinylidene fluoride and hexafluoropropane which has been crosslinked in the presence of an extractable plasticiser and a crosslinking agent. The crosslinking agent is selected from acrylate ester, di- or tri-allyl ester and a di or tri-glycidyl ether. 20-70 wt.% of a soln. of at least one lithium salt in organic solvent is dispersed in the film.    Also claimed is a rechargeable lithium intercalation battery cell comprising positive and negative electrodes with electrolyte above.    Further claimed is a separator membrane comprising the self-supporting film above.    Further claimed is a rechargeable battery cell assembly inducing the separator above between the electrodes.    ADVANTAGE -   The electrolyte is strong and flexible, can be mfd. economically and easily, and functions over a good temp. range. The crosslinked material has limited flow capability at raise temp. improving cell capability and decreasing tendency to short circuit of high temp. while preserving high ionic conductivity.    (TW363287-A)      Solid electrolyte for rechargeable lithium intercalation battery cell comprising a dissociable lithium salt dispersed in a polymeric matrix is claimed. The electrolyte comprises a self-supporting film of a copolymer of vinylidene fluoride and hexafluoropropane which has been crosslinked in the presence of an extractable plasticiser and a crosslinking agent. The crosslinking agent is selected from acrylate ester, di- or tri-allyl ester and a di or tri-glycidyl ether. 20-70 wt.% of a soln. of at least one lithium salt in organic solvent is dispersed in the film.    Also claimed is a rechargeable lithium intercalation battery cell comprising positive and negative electrodes with electrolyte above.    Further claimed is a separator membrane comprising the self-supporting film above.    Further claimed is a rechargeable battery cell assembly inducing the separator above between the electrodes.    ADVANTAGE -   The electrolyte is strong and flexible, can be mfd. economically and easily, and functions over a good temp. range. The crosslinked material has limited flow capability at raise temp. improving cell capability and decreasing tendency to short circuit of high temp. while preserving high ionic conductivity.