TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: In the positive active material layer composition: the lithium metal oxide comprises at least one lithium cobalt oxide, lithium nickel cobalt manganese oxide or lithium nickel cobalt aluminum oxide, where the lithium metal oxide has an average particle diameter of 5-20 mu m; the tungsten oxide is disposed on a part of the surface of the lithium metal oxide, where the tungsten oxide is present at a concentration of 0.1-5 parts by weight based on 100 parts by weight of the lithium metal oxide; and the tungsten oxide has an average particle diameter of 50-1000 nm. In the positive active material layer composition, the positive active material is present at a concentration of 85-98 wt.%.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The positive active material layer composition further comprises: a thickener; a conductive material. Preferred Components: In the positive active material layer composition: the thickener comprises at least one of carboxymethyl cellulose or hydroxypropylmethyl cellulose, where the thickener is present at a concentration of 0.1-10 wt.%; and the conductive material is present at a concentration of 1-5 wt.%. In the positive active material layer composition, the aqueous binder is present at a concentration of 0.1-5 wt.%. The positive active material layer composition comprises the positive active material and aqueous binder in a weight ratio of 30:1-200:1. The aqueous binder comprises at least one fluorine-based acrylate, styrene-butadiene rubber, acrylate styrene butadiene rubber, acrylonitrile-butadiene rubber, acrylic rubber, butyl rubber, fluorine rubber, PTFE, polyethylene, polypropylene, ethylene-propylene copolymer, polyethyleneoxide, polyvinylpyrrolidone, polyepichlorohydrine, polyphosphazene, polyacrylonitrile, polystyrene, ethylene-propylene-diene copolymer, polyvinylpyridine, chlorosulfonated polyethylene, latex, polyester resin, acrylic resin, phenolic resin, epoxy resin or polyvinylalcohol. EXAMPLE - 96 wt.% Lithium nickel cobalt aluminum oxide (Li(Ni(0.8)Co(0.15)Al(0.05)O2) and 0.5 wt.% of tungsten oxide were mixed and agitated for 12 hours to coat the tungsten oxide on the surface of Lithium nickel cobalt aluminum oxide (Li(Ni(0.8)Co(0.15)Al(0.05)O2), to obtain positive active material. The obtained positive active material was mixed with 2 wt.% of carbon black and 0.7 wt.% of carboxymethyl cellulose, and the resulting reaction mixture was agitated with water, to obtain a paste composition. The paste composition was diluted by adding water in an appropriate amount. Then 0.8 wt.% of fluorine-based acrylate was added to the resulting product, to obtain a positive active material layer composition.