abstract |
The present invention relates to a positive electrode active material formed of a double layer and a positive electrode for a lithium secondary battery comprising the same, Li(Ni x Co y Mn z )O 2 (0<x<1, 0<y<1, 0<z<1 , x+y+z=1) layer and Li(Ni x Co y Mn z )O 2 By including the LiCoO 2 layer formed on the upper surface, an electrode having a high capacity and a long life can be provided. |