Lithium-cobalt composite oxide and its producing method and non-aqueous electrolyte cell

The present invention provides an improved discharge characteristics of the lithium secondary battery. Ni content is 100ppm or less of lithium cobalt composite oxide. The method for producing the Ni content of 100ppm or less of cobalt oxyhydroxide and a mixture of a lithium compound is heated at 700 ~ 1100 ℃ lithium cobalt composite oxide.