| 摘要 |
A positive electrode active material for a nonaqueous electrolyte secondary battery, and a nonaqueous electrolyte secondary battery using the active material are provided to improve both capacity and output power simultaneously. A positive electrode active material for a nonaqueous electrolyte secondary battery is represented by Li_x (Ni_(1-y) Co_y)_(1-z) M_z O2, wherein 0.98<=x<=1.10; 0.05<=y<=0.4; 0.01<=z<=0.02; and M is at least one selected from the group consisting of Al, Zn, Ti and Mg. The positive electrode active material has a Li site occupation of 98.5 % or more and a metal site occupation of 95-98 % in crystal by the Rietveld analysis. |
