| 摘要 |
PROBLEM TO BE SOLVED: To provide a positive electrode active material for a nonaqueous electrolyte secondary battery superior in dispersing and filling characteristics. SOLUTION: This positive electrode active material for a nonaqueous electrolyte secondary battery is composed of granulated lithium cobalt acid particles satisfying that an average particle size (D50 ) of primary particles measured by laser diffraction device is 2.0-10.0 μm, D10 in the distribution of grain size of the primary particles is 1.0 μm or more, and D90 is 13 μm or less, a ratio of D10 /D90 is 0.34 or more, an average primary particle size (DSEM) observed by a scanning electron microscope is 2.0-10.0 μm, and D50 and DSEM satisfy that D50 =aDSEM (a=0.9-1.2). |
