LITHIUM-COBALT BASED COMPOSITE OXIDE POWDER, PROCESS FOR PREPARING THE SAME, POSITIVE ELECTRODE ACTIVE MATERIAL OF LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To produce such a lithium cobalt multiple oxide powder that, when the oxide is used as the positive pole active substance of a lithium secondary cell, the lithium secondary cell can be improved particularly in cycle characteristics, an industrially advantageous method for producing the same, and a positive pole active substance of the lithium secondary cell containing the same, and a lithium secondary cell having the excellent cycle characteristics.

SOLUTION: The lithium cobalt multiple oxide powder contains 0.025 to 1.0 wt% metal atoms of at least one kind selected among Mg, Al, Zr, Ca, and Ti and is produced by mixing a lithium compound, a cobalt compound, and a compound including the metal atoms selected from the phosphate or hydrogen phosphate, and firing the mixture.

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