(US4818643-A)      Polymeric electrolyte material, for use in an electrochemical cell, comprises a blend of (a) an ionisable salt; (b) an extrudable organic polymer capable of permitting sufficient transfer of dissociated ions of the salt so that the blend can function as an electrolyte in an electrochemical cell in the absence of any liq.; and (c) a plasticising agent which inhibits change in the morphology of the polymer from an amorphous phase to a crystalline phase.    Pref. agent (c) has a dielectric constant at least 15, esp. at least 30. Pref. (c) is propylene carbonate, ethylene carbonate or tetramethylene sulphone.    ADVANTAGE -   Significant improvements in electrical power cell assembly can be achieved e.g. by protection against contamination of the electrode material. (9pp)c    (US5013619-A)      Polymeric electrolyte is made by melt-blending a mixt. of (a) inorganic salt; (b) organic polymer which permits transfer of dissociated ions of salt in amt so that the blend can function as an electrolyte without liq.; and (c) 5-60wt% of plasticiser of dielectric constant 15 or more w.r.t. (a)+(b). Blend is formed into a film.    Pref. (c) is propylene carbonate, ethylene carbonate, tetramethylene sulphone, gamma-butyrolactone, or dimethylformamide; and (a) is lithium trifluorosulphonate.    USE -   Used for electrochemical power cells. (9pp)e    (DE3485832-G)      Melt-extruded polymeric electrolyte material for an electro-chemical power cell is claimed. Pref. the polymeric electrolyte material comprises a plasticising agent (I) that at least inhibits change in the morphology of the polymer from an amorphous phase to a crystalline phase. The cell may also comprise a melt extruded cathode material, and a metallic anode material may be co-extruded with the electrolyte material.    Pref. (i) the dielectric constant of the (I) is greater than 20, esp. greater than 40; (ii) the electrode has a melt-extruded cathode material on the polymeric electrolyte material, esp. where the electrode is a Li metal electrode; (iii) the melt-extruded cathode material comprising polymeric material and a cathodic filler, (iv) the polymeric electrolyte is a salt-loaded polymer pref. contg. a (I) such as propylene carbonate.    USE/ADVANTAGE -   The process permits simple automated prodn. and assembly of electrochemical power cells, using extrusion techniques which may be extended to include co-extrusion of suitable electrodes such as Li anodes.    (JP93042786-B)      Melt-extruded polymeric electrolyte material for an electrochemical power cell is claimed. Pref. the polymeric electrolyte material comprises a plasticising agent (I) that at least inhibits change in the morphology of the polymer from an amorphous phase to a crystalline phase. The cell may also comprise a melt extruded cathode material, and a metallic anode material may be co-extruded with the electrolyte material.    Pref. (i) the dielectric constant of the (I) is greater than 20, esp. greater than 40; (ii) the electrode has a melt-extruded cathode material on the polymeric electrolyte material, esp. where the electrode is a Li metal electrode; (iii) the melt-extruded cathode material comprising polymeric material and a cathodic filler, (iv) the polymeric electrolyte is a salt-loaded polymer pref. contg. a (I) such as propylene carbonate.    USE/ADVANTAGE -   The process permits simple automated prodn. and assembly of electrochemical power cells, using extrusion techniques which may be extended to include coextrusion of suitable electrodes such as Li anodes. (J60151979-A)