TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The inorganic ion salt comprises inorganic ion salt(s) containing lithium element.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The polymer comprises first monomer and second monomer in a molar ratio of 100:0-50:50. EXAMPLE - 2-Cyanoethyl acrylate monomer (70 g) was charged in flask purged with nitrogen. The monomer was distilled by conventional vacuum distillation technique. Dry acetone as polymerization solvent (163 g) and 2,2'-azobisisobutyronitrile as free radical initiator to provide molar ratio of 0.01 relative to the monomer was added and 0.001 mole of lauryl mercaptan as chain transfer agent added. A nitrogen inlet tube was connected to the flask. The ingredients were allowed to react at 60degrees C for 300 minutes. At the end of the reaction, the reaction solution was cooled to room temperature and poured into excess volume of methanol for precipitation. The procedure of dissolving the precipitate in acetone and pouring into an excess volume of methanol was repeated several times. The precipitate thus worked up was dried, yielding poly(2-cyanoethyl acrylate) with viscosity of 20 wt.% in dimethyl formamide, relative permittivity of 18 at 40degrees C and 1 KHz and softening temperature of 30degrees C. The poly(2-cyanoethyl acrylate) (2 g) was dissolved in acetone (10 g). The solution was added with lithium chlorate (0.8 g) in acetone (3 g), and followed by intimate mixing. The solution was cast on Teflon(RTM: PTFE) plate and allowed to stand at room temperature for 24 hours during that time an excess of solvent was removed. The wet film was dried under reduced pressure at 60degrees C for 24 hours, yielding an ion conductive solid electrolyte film of 50 microns thick. The film was transparent and had lithium chlorate uniformly distributed in it. A disk of diameter was cut out of film and sandwiched between pair of stainless steel plates to form an electrode. The electrode had ionic conductivity of 1.1x10-3 S/cm at 25degrees C. A positive electrode was prepared by mixing lithium cobalt dioxide and Ketjen Black(RTM: conductive pigment) in weight ratio of 90:1 to form a mix, and mixing the mix with solution to poly(2-cyanoethyl acrylate) (2 g) in acetone (10 g) in weight ratio of 1:2. The resulting mixture was cast on positive electrode collector plate of aluminum and heat dried in nitrogen atmosphere. A negative electrode was prepared by pressure bonding metallic lithium to stainless steel collector plate. The ion conductive solid electrolyte film was sandwiched between the positive and negative electrodes. The laminate was heat pressed at 80degrees C in nitrogen atmosphere to compress the solid electrolyte film to thickness of 25 microns. The secondary cell was placed in pressure resistant can of stainless steel that was purged with nitrogen and sealed under atmospheric pressure. The cell was charged with current flow at 0.1 mA/cm2 until a cell voltage of 4.2 V was reached and discharged with current flow at 0.1 mA/cm2 until cell voltage of 2.75 V was reached. The charge/discharge operation was repeated 300 cycles after which no increase of internal pressure within the can was found.