TECHNOLOGY FOCUS - CERAMICS AND GLASS - Preferred Component: The substrate is glass substrate or plastic substrate.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The inorganic particles contain strontium titanate, tin oxide, cerium oxide magnesium oxide, nickel oxide, calcium oxide, zinc oxide, zirconium oxide, silicon dioxide, yttrium oxide, aluminum oxide, aluminum hydroxide, titanium dioxide, silicon carbide, hafnium oxide, barium titanate, lead-zirconium titanate-containing compound (Pb(Zrx,Ti1-x)O3, where x is 0 less than x less than 1), lead-lanthanum titanate-containing compound (Pb1-xLaxZr1-yTiyO3, where y is 0 less than y less than 1), or lead-magnesium-niobium titanate-containing compound ((1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3). The inorganic particles are chosen from lithium phosphate, lithium-titanium phosphate-containing compound (LixTiy, where is x is 0 less than x less than 2 and y is 0 less than y less than 3), lithium-aluminum-titanium phosphate (LixAlyTiz(PO4)3, where x is 0 less than x less than 2, y is 0 less than y less than 1, and z is 0 less than z less than 3), lithium-lanthanum titanate (LixLayTiO3, where x is 0 less than x less than 2 and y is 0 less than y less than 3), lithium-germanium thiophosphate (LixGeyPzSw, where x is 0 less than x less than 4, y is 0 less than y less than 1, z is 0 less than z less than 1, and w is 0 less than w less than 5), lithium nitride (LixNy, where x is 0 less than x less than 4 and y is 0 less than y less than 2), lithium-silicon sulfide-containing compound (LixSiySz, where x is 0 less than x less than 3, y is 0 less than y less than 2, and z is 0 less than z less than 4), and lithium-phosphor-sulfide-containing compound (LixPySz, where x is 0 less than x less than 3, y is 0 less than y less than 3, and z is 0 less than z less than 7). Preferred Properties: The inorganic particles have a dielectric constant of 5 or more and an average particle diameter of 0.001-100 mu .    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: The solvent is chosen from acetone, methanol, ethanol, tetrahydrofuran, methylene chloride, chloroform, dimethylformamide, N-methypyrrolidone, cyclohexane, and water.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The dispersion solution further contains a dispersing agent chosen from 14 compounds e.g. polyvinylpyrrolidone, polyacrylic acid hydrazide, polyvinyl alcohol, polyacrylamide, and polyacrylic acid. The polymer binder is chosen from 25 compounds e.g. polyvinylidene fluoride, styrene butadiene rubber, carboxymethylcellulose, polyacrylonitrile, and polyvinylpyrrolidone. The polymer fibers contain polyolefin, polyester, polyacetal, polyamide, polycarbonate, polyimide, polyether-ether-ketone, polyethersulfone, polyphenylene oxide, or polyphenylene sulfide. Preferred Properties: The average thickness of the polymer fibers is 0.05-10 mu . The average pore diameter of the separator is 40-200 nm.