TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Property: The primary positive electrode material and secondary positive electrode material have cumulative volume average particle diameter of 20-30 mu m and 4-7 mu m, respectively. Preferred Composition: The ratio of the content of primary positive electrode material with respect to content of secondary positive electrode material is 50:50-70:30. The inorganic particles include primary inorganic particles and secondary inorganic particles. The primary inorganic particles are strontium titanate, tin oxide, cerium oxide, magnesium oxide, nickel oxide, calcium oxide, zirconium oxide, yttrium oxide, alumina, titania and/or silicon carbide. The secondary inorganic particles are barium titanate, lead-zirconium titanate, hafnia, lead-lanthanum-zirconium titanate ((Pb1-xLaxZr1-yTiyO3), where x is 0 to 2 and y is 0 to 3), lead-magnesium niobate, lead titanate, lithium phosphate, lithium-titanium phosphate (LixTiy(PO4)3, where x is 0 to 2 and y is 0 to 3), lithium-aluminum-titanium phosphate (LixAlyTiz(PO4)3, where x is 0 to 2, y is 0 to 1 and z is 0 to 3), lithium-aluminum-titanium phosphorus oxide ((LiAlTiP)xOy, where x is 0 to 4 and y is 0 to 13), lithium-lanthanum titanate ((LixLayTiO3), where x is 0 to 2 and y is 0 to 3), lithium nitride ((LixNy), where x is 0 to 4 and y is 0 to 2), lithium-silicon sulfide ((LixSiySz), where x and y are 0 to 3 and z is 0 to 7) and/or lithium-phosphorus sulfide ((LixPySz), where x is 0 to 2, y is 0 to 3 and z is 0 to 7).    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The binder polymer is polyvinylidene fluoride-hexafluoropropylene copolymer, polyvinylidene fluoride-trichloroethylene copolymer, polymethylmethacrylate, polyacrylonitrile, polyvinylpyrrolidone, polyvinyl acetate, ethylene-vinyl acetate copolymer, polyimide, polyethylene oxide, cellulose acetate, cellulose acetate butyrate, cellulose acetate, cellulose acetate propionate, cyanoethyl pullulan, cyanoethyl polyvinyl alcohol, cyanoethyl cellulose, cyanoethyl sucrose, pullulan, carboxymethyl cellulose and/or polyvinyl alcohol.