TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The cathode further contains cathode active material (B) of formula: LixCoO2, Lix"MnO2, Lix"Mn2O4, Lix"Ni1-rCorO2, Lix"Co1-rMnrO2, Lix"Ni1-rMnrO2, Lix"Mn2-pNipO4 or Lix"Mn2-pCopO4, and cathode active material (C) of formula: LiNioM3p'O2. The cathode active material has cutting diameter of 8 mu m or less. The cathode active material (A) is lithium-nickel-manganese-cobalt oxide of formula: Li1+x'(NiaMnbCo1-a-b-x')O2 or Li1+x'(Mn2-x'-y'Coy')O4. The weight ratio of the cathode active material (A) and cathode active material (B) is 10:90-50:50. The lithium salt (b) is chosen from lithium acetate, lithium trifluoroacetate and lithium octanoate. The lithium salt (a) contains anion chosen from 26 anions e.g. fluorine ion, chlorine ion, bromine ion, iodine ion and tetrafluoroborate ion. The content of the lithium salt (b) is 0.05-0.5 wt.%.M3=Co or Al;o=0.7-0.8;p'=more than 0.2 to less than 0.3;x"=more than 0.5 to less than 1.3;x'=(-0.1)-0.1;y'=0-2;andr,p=more than 0 to less than 1.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The non-aqueous organic solvent is chosen from dimethyl sulfoxide, acetonitrile, dimethoxyethane, diethoxyethane, sulfolane, propylene sulfite and tetrahydrofuran. The non-aqueous electrolyte further contains additives chosen from vinylene carbonate, fluorinated ethylene carbonate, vinyl ethylene carbonate, propane sultone, ethylene sulfite, 1,3-propane sultone and N-acetyl caprolactam, and binder component chosen from vinylidene fluoride-hexafluoropropylene copolymer, polyvinylidene fluoride, polyacrylonitrile and polymethyl methacrylate.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The separation film is made of porous non-woven fabric containing ethylene homopolymer, propylene homopolymer, ethylene-butene copolymer, ethylene-hexene copolymer, ethylene-methacrylate copolymer, polyolefin-based polymer, high-melting glass fibers and/or polyethylene terephthalate fibers.