| abstract |
The present invention relates to a core layer comprising lithium nickel-manganese-cobalt oxide; An isolation layer formed on the surface of the core layer and including an oxide of at least one metal selected from the group consisting of Al, Mg, B, Sr, and W; And a shell layer formed on the surface of the separating layer and containing lithium nickel-manganese oxide. The cathode active material according to the present invention is a high capacity, high stability And high cycle characteristics at the same time. |