LITHIUM COBALTATE, ITS PREPARATION METHOD, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide lithium cobaltate which is excellent in load characteristics and blister inhibition and is useful as a positive electrode active material in a non-aqueous electrolyte secondary battery, its preparation process, and a non-aqueous electrolyte secondary battery using a positive electrode active material containing the same.

SOLUTION: The lithium cobaltate is obtained from cobalt oxyhydroxide and a lithium compound and has an average particle size of 10-15 μm and a residual lithium carbonate content of ≤0.1 wt.%. In the preparation method of the lithium cobaltate, cobalt oxyhydroxide having an angle of repose of ≤50° and a tap density of 1.3-1.8 g/cm3is mixed with the lithium compound and subsequently baked.

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