| 摘要 |
PROBLEM TO BE SOLVED: To produce an Li-Co-based compound oxide useful as a positive pole active material for a nonaqueous electrolyte battery such as a lithium secondary battery and capable of improving charge and discharge cycle characteristics of the battery and to provide a method for producing the Li-Co-based compound oxide. SOLUTION: This particulate Li-Co-based compound oxide has the sum value A (μm) of respective lattice spacings in (104), (105), (009), (107), (108) and (113) indices of planes, the specific surface area B (m2/g) and the average particle diameter C (μm) satisfying the following formula: formula: 0.025<=[(A-11)/(B.C)]<=0.04. The method for producing the Li-Co-based compound oxide comprises carrying out water washing treatment of a particulate material of the Li-Co-based compound oxide, regulating the amount of water-soluble lithium compound-based impurities to <=0.05 wt.% and then heat-treating the resultant compound oxide at 400-700 deg.C for 0.5-50 h. The Li-Co-based compound oxide is suitable for producing a long-lived lithium secondary battery for various kinds of electrical equipment, especially for portable articles, etc. |
