| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a positive electrode active material for a nonaqueous electrolyte secondary battery stably manufacturable at a low cost by using cobalt oxide having various characteristics and particle size distributions, and having a desired characteristic and excellent coating properties and battery characteristics; to provide cobalt oxide for a nonaqueous electrolyte secondary battery and its manufacturing method; and to provide a nonaqueous electrolyte secondary battery. <P>SOLUTION: This positive electrode active material for a nonaqueous electrolyte secondary battery is expressed by LiCo<SB>1-x</SB>M<SB>x</SB>O<SB>2</SB>, wherein M is at least one kind of metal element selected from Mn, Fe, Mg, Al, Ti, Cu, Zn and Ga. The active material contains more than more than 90 vol.% of primary particles each having a fillet diameter of less than 3 μm in all the primary particles, and more than 90 vol.% of secondary particles each having a fillet diameter of 5-30 μm in all the secondary particles. <P>COPYRIGHT: (C)2004,JPO |
