| abstract |
PROBLEM TO BE SOLVED: To provide a lithium cobalt oxide particle powder having a high density and having crystals uniformly grown. The lithium cobalt oxide particle powder according to the present invention is useful as a positive electrode active material used in a non-aqueous electrolyte secondary battery. SOLUTION: The average particle diameter (D50) of secondary particles is 15.0 to 25.0 μm, the BET specific surface area value (BET) is 0.10 to 0.30 m 2 / g, and the compression density (CD2. 5t / cm < 2 >) is 3.65 to 4.00 g / cm < 3 >, The lithium cobalt oxide particle powder can be obtained by using a specific cobalt oxyhydroxide particle powder for a precursor. [Selection figure] None |