| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a positive electrode active material for a nonaqueous lithium secondary battery capable of achieving a high output, and to provide the positive electrode active material and the lithium secondary battery using them. <P>SOLUTION: In the nonaqueous lithium secondary battery that uses a composite oxide composed of lithium and a transition metal as the positive electrode active material, the positive electrode active material is composed of an oxide having a layered crystal structure and represented by a composition formula Li<SB>a</SB>Mn<SB>x</SB>Ni<SB>y</SB>M<SB>z</SB>O<SB>2</SB>[M is at least one of Co and Al] where the followings are satisfied: 1≤a≤1.2; 0.2≤x≤0.5; 0.35≤y≤0.5; 0≤z≤0.45 and x+y+z=1. The oxide has undergone surface modification with a compound containing at least one of Al, Mg, Sn, Ti, Zn and Zr. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
