TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The inorganic particle has average particle diameter of 0.001-10 mu m, a dielectric constant of greater than or equal to 5 and lithium-ion transfer capabilities. The inorganic particle includes barium titanate, lead zirconium titanate, lanthanum-doped lead zirconium titanate of formula (Pb1-xLaxZr1-yTiyO3), where x and y are 0-1, lead magnesium niobate-lead titanate (Pb(Mg(1/3)Nb(2/3))O3-PbTiO3), hafnium oxide, strontium titanate, tin oxide, cerium oxide, magnesium oxide, nickel oxide, zinc oxide, zirconium oxide, calcium oxide, silicon dioxide, yttrium oxide, aluminum oxide, silicon carbide, titanium oxide, lithium titanium phosphate, lithium titanium phosphate (LixTiy(PO4)3), where x is 0-2 and y is 0-3, lithium aluminum titanium phosphate (LixAlyTiz(PO4)3), where x is 0-2, y is 0-1 and z is 0-3, lithium aluminum titanium series glass (LiAlTiP)xOy, where x is 0-4 and y is 0-13, lithium lanthanum titanate (LixLayTiO3), where x is 0-2 and y is 0-3, lithium germanium phosphate thiosulfate (LixGeyPzSw), where x is 0-4, y is 0-1, z is 0-1 and w is 0-5, lithium nitride (LixNy), where x is 0-4 and y is 0-2, lithium silicon sulfide (LixSiySz), where x is 0-3, y is 0-2 and z is 0-4, lithium phosphate thiosulfate series glass (LixPySz), where x is 0-3, y is 0-3 and z is 0-7. The porous base material has a thickness of 5-50 mu m, pore size of 0.01-50 mu m and porosity of 10-95%.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The separator comprises monomer mixture including 20-70 wt.% of acrylate monomer and 30-80 wt.% of acrylic monomer, and epoxy-based crosslinker (0.1-10 pts. wt.) consisting of crosslinkable monomer and isocyanate crosslinker. The acrylic copolymer has functional group consisting of amine group, amide group, cyano group and imide group. The monomer is 2-methacryloyloxyethyl trimethyl ammonium chloride, 2-butoxyaminocarbonyloxyethylmethacrylate, 2-diethylamino ethyl methacrylate, 2-dimethylamino ethyl methacrylate, 3-diethylamino propyl methacrylate, 3-dimethylamino propyl methacrylate, ethyl cis-beta-cyano methacrylate, methyl 2-aceto amido methacrylate, 2-methacrylamide glycolic acid, 2-methacrylamide-2-methyl-1-propansulfonic acid, 3-methacrylamido propyl trimethyl ammonium chloride, N-methacryloylamido-ethoxyethanol, 3-methacryloylamino-1-propanol, N-butoxymethyl methacrylamide, N-tert-butyl methacrylamide, diacetone methacrylamide, N,N-dimethyl methacrylamide, N,N-diethyl methacrylamide, N-hydroxyethyl methacrylamide, N-hydroxymethylmethacrylamide, N-isobutoxymethyl acrylamide, N-isopropyl methacrylamide, methacrylamide, N-phenyl methacrylamide, N-tris-hydroxymethyl methacrylamide, N,N'-o-phenylene dimaleimide, N,N'-1,3-phenylene dimaleimide, N,N'-1,4-phenylene dimaleimide, 2-isocyanatoethyl methacrylate, N,N'-1,2-dihydroxy ethylene bisacrylamide, diurethane dimethacrylate, N,N'-bis-methacrylamide, 4-meth acryloylmorpholene, methylacrylonitrile, 2-vinyl oxyethanenitrile, 2-vinyl oxypropanenitrile, cyanomethyl methacrylate, cyanoethyl methacrylate and cyanopropyl methacrylate. The acrylate monomer consists of methylmethacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, tertiary-butyl methacrylate, secondary-butyl methacrylate, pentyl methacrylate, 2-ethylbutyl methacrylate, 2-ethylhexyl methacrylate, N-octyl methacrylate, isooctyl methacrylate, isononyl methacrylate, lauryl methacrylate and tetradecyl methacrylate. The crosslinkable monomer is 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 4-hydroxybutyl methacrylate, 2-hydroxyethylene glycol methacrylate, 2-hydroxypropylene glycol methacrylate, acrylic acid, methacryl acid, and maleic anhydride. The epoxy-based crosslinker is ethylene glycol, diglycidyl ether, triglycidyl ether, trimethylolpropane triglycidyl ether, N,N,N'N'' tetra-glycidyl ethylenediamine and glycerin diglycidyl ether. The isocyanate crosslinker is tolylene diisocyanate, xylene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, isostearic boron diisocyanate, tetramethylxylene diisocyanate, naphthalene diisocyanate and polyol.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The weight ratio of binder and inorganic particle is 50:50-99:1. The porous base material is polyolefin-group porous base material including polyethylene, polypropylene, polybutylene and polypentene.