TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Layers: The conductive layer contains fibrous carbon and has thickness of 0.5-5 microns. The positive electrode active material layer contains positive electrode materials (A,B). The material (A) is compound having compositional formula: LiaCo1-bM1bO2-c and material (B) is compound having compositional formula: LiwNixCoyMnzM21-x-y-zO2-v.M1=manganese, nickel, magnesium, aluminum, boron, titanium, vanadium, chromium, iron, copper, zinc, gallium, yttrium, zirconium, niobium, molybdenum, tin, calcium, strontium and/or tungsten;M2=same as M1 except manganese and nickel;a,w=0.9-1.1;b=0-0.3;c,v=-0.1-0.1;x=0-1;y=0-0.7;z=0-0.5;and1-x-y-z=0-0.2.The ratio of electrode material (A) to electrode material (B) is 9:1-2:8.    TECHNOLOGY FOCUS - POLYMERS - Preferred Material: Portion(s) of the positive electrode side of separator consists of polyvinylidene fluoride and/or polypropylene. EXAMPLE - A positive electrode collector consisting of aluminum foil was applied on both surfaces with mixture of fibrous carbon, polytetrafluoroethylene (binder) and N-methyl-2-pyrrolidone as solvent in the ratio of 7:3:90, and dried, and conductive layer was formed. The positive electrode material containing lithium cobaltate having average particle diameter of 10 microns and positive electrode material containing lithium nickel cobalt manganese oxide (LiNi0.5Co0.2Mn0.3O2) having average particle diameter of 9.6 microns were mixed in the mass ratio of 8:60 and positive electrode material was prepared. Polyvinylidene fluoride and Ketchen black were mixed with the electrode material and dispersed in N-methyl-2-pyrrolidone as solvent and resulting mixture was applied on the conductive layer, and the positive electrode active material layer was formed by performing compression molding and positive electrode was produced. A battery was produced using the positive electrode, negative electrode, electrolyte and separator. The battery had open circuit voltage of 4.25 V during full-charge state, initial stage discharge capacitance of 563 mAh/cm3 and discharge capacitance maintenance factor of 90% after 200 cycles.