TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The inorganic particles are inorganic particles having dielectric constant more than 5 and/or inorganic particles having lithium-ion transport capacity. The inorganic particles having dielectric constant more than 5 contains barium titanate, lead zirconate titanate, lead-lanthanum-zirconium-titanium complex oxide (Pb1-xLaxZr1-yTiyO3), lead-magnesium-niobium-lead-titanium oxide (Pb(Mg1/3Nb2/3)O3-PbTiO3), hafnium oxide, strontium titanate, lead oxide, cerium oxide, magnesium oxide, nickel oxide, calcium oxide, zinc oxide, zirconium oxide, silicon oxide, yttrium oxide, aluminum oxide, silicon carbide and/or titania, where x and y are more than 0 and less than 1. The inorganic particles having lithium-ion transport capacity comprises lithium phosphate, lithium-titanium phosphate (LiaTib(PO4)3), lithium-aluminum-titanium phosphate (LiaAlcTib(PO4)3), lithium-aluminum-titanium-phosphorus oxide ((LiAlTiP)dOe), lithium-lanthanum titanate (LiaLabTiO3), lithium-germanium-phosphorus sulfide (LidGecPcSw), lithium nitride (LidNa), lithium-silicon sulfide (LibSiaSd) and/or lithium-phosphorus sulfide (LibPbSz), where a is more than 0 and less 2, b is more than 0 and less than 3, c is more than 0 and less than 1, d is more than 0 and less than 4, e is more than 0 and less than 13, w is more than 0 and less than 5 and z is more than 0 and less than 7.    TECHNOLOGY FOCUS - POLYMERS - Preferred Film: The separator has micro porous polyethylene film, polypropylene film, polyvinylidene fluoride, polyethylene oxide film, polyacrylonitrile film, polyvinylidene fluoride film, or film containing inorganic particles and polymeric binder. Preferred Composition: The polymeric binder comprises polyvinylidene fluoride-co-hexafluoropropylene, polyvinylidene fluoride-co-trichloroethylene, polymethylmethacrylate, polybutylacrylate, polyacrylonitrile, polyvinylpyrrolidone, polyvinylacetate, polyethylene-co-vinyl acetate, polyethylene oxide, polyarylate, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate, cyanoethylpullulan, cyanoethylpolyvinylalcohol, cyanoethylcellulose, cyanoethylsucrose, pullulan and/or carboxyl methyl cellulose.