TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The inorganic particles comprise inorganic particles (i) and/or inorganic particles (ii). The particles (i) are chosen from barium titanate (BaTiO3), lead-zirconium-titanium-oxygen complex (Pb(Zr,Ti)O3) (PZT), lead-lanthanum-zirconium-titanium-oxygen complex (PLZT) (Pb1-xLaxZr1-yTiyO3, where x and y are 0-1, excluding 0 and 1), lead-magnesium-niobium-titanium-oxygen complex (Pb(Mg1/3Nb2/3)O3-PbTiO3) (PMN-PT), hafnia (HfO2 ), strontium titanate (SrTiO3), tin oxide (SnO2), ceria (CeO2), magnesium oxide (MgO), nickel oxide (NiO), calcium oxide (CaO), zinc oxide (ZnO), zirconia (ZrO2), silica (SiO2), yttrium oxide (Y2O3) , alumina (Al2O3), silicon carbide (SiC) and titania (TiO2). The particles (ii) are chosen from lithium phosphate (Li3PO4), lithium titanium phosphate (LixTiy(PO4)3 , where x is 0-2 excluding 0 and 2, y is 0-3 excluding 0 and 3), lithium aluminum titanium phosphate (LixAlyTiz(PO4)3, where x is 0-2 excluding 0 and 2, y is 0-1 excluding 0 and 1, and z is 0-3 excluding 0 and 3), lithium-aluminum-titanium-phosphorus oxide type glass ((LiAlTiP)xOy, where x is 0-4 excluding 0 and 4 and y is 0-13 excluding 0 and 13), lithium lanthanum titanate (LixLayTiO3, where x is 0-2 excluding 0 and 2, y is 0-3 excluding 0 and 3), lithium germanium thiophosphate (LixGeyPzSw, where x is 0-4 excluding 0 and 4, y and z are 0-1 excluding 0 and 1, and w is 0-5 excluding 0 and 5), lithium nitride (LixNy, where x is 0-4 excluding 0 and 4, and y is 0-2 excluding 0 and 2), silicon-type glass (SiS2 (LixSiySz), where x is 0-3 excluding 0 and 3, y is 0-2 excluding 0 and 2, and z is 0-4 excluding 0 and 4) and phosphorus-type glass (P2 S5(LixPySz), where x and y are 0-3 excluding 0 and 3, and z is 0-7 excluding 0 and 7). Preferred Properties: The inorganic particles (i) has permittivity constant of greater than or equal to 5. The inorganic particles (ii) have lithium ion transfer capability.    TECHNOLOGY FOCUS - POLYMERS - Preferred Polymers: The binder polymer (A) is chosen from polyvinyl fluoride-hexafluoro propylene (polyvinylidene fluoride-co-hexafluoropropylene), polyvinylidene fluoride-trichloroethylene (polyvinylidene fluoride-co-trichloroethylene), polymethyl methacrylate, polybutyl acrylate, polyacrylonitrile, polyvinyl pyrrolidone, polyvinyl acetate, ethylene-vinyl acetate copolymer (polyethylene-co-vinyl acetate), polyethylene oxide, polyarylate, cellulose acetate, cellulose acetate butylate (cellulose acetate butyrate), cellulose acetate propionate, cyanoethyl pullulan, cyanoethyl polyvinyl alcohol, cyano ethyl cellulose, cyano ethyl sucrose, pullulan, carboxyl methyl cellulose, acrylonitrile-butadiene-styrene copolymer and polyimide. The binder polymer (B) is chosen from terpene resin, petroleum resin and rosin-type resin such as abietic acid, levopimaric acid or neo-abietic acid. The terpene resin is alpha -pinene, beta -pinene, diepentene, alpha -pinene phenol resin, diepentene phenol resin or terpene bisphenol resin. The petroleum resin is aliphatic 5C group petroleum resin, aromatic 9C group petroleum resin, copolymerized petroleum resin, dicyclopentadiene (DCPD) type resin or hydrogenated resin. The porous base material is polyolefin-type porous base material such as polyethylene, polypropylene, polybutylene or polypentene.