| abstract |
(57) [Abstract] [Purpose] To provide a positive electrode for a lithium secondary battery having a high capacity and excellent cycleability. As a positive electrode active material, Li y Ni 1-x M x O 2 (where M is at least one element selected from the group consisting of Cu, Zn, Nb, Mo and W, and 0 <x <1 is satisfied). Yes, and when M is selected from Cu and Zn 0.9 ≦ y ≦ 1. 4, when M is selected from Nb, Mo and W 0.8 ≦ y ≦ 1.3) is used. |