| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a positive electrode active material for a nonaqueous electrolyte secondary cell, with improved current collecting efficiency, a good rate property and cycle property. <P>SOLUTION: The positive electrode active material for a nonaqueous electrolyte secondary cell is made of a lithium composite cobalt oxide represented as a formula LiCoXO<SB>2</SB>(note, 1.0<X≤1.05), of which, one to 20 primary particles agglutinate and form secondary particles, with a repose angle of not more than 60 degrees, an average particle diameter from 1 to 10 μm, and a specific surface area from 0.5 to 1.0 m<SP>2</SP>/g. Since the number of primary particles to structure the secondary particles is fewer than usual, a dispersion property of a conductive material is better, so that, a rate property and a cycle property are greatly improved. <P>COPYRIGHT: (C)2004,JPO |
