| abstract |
A core, an intermediate layer disposed on the core, and a shell disposed on the intermediate layer, and the porosity of the core, the intermediate layer, and the shell sequentially decreases; and the intermediate layer and the shell include a radial array structure. A nickel-based active material precursor for a lithium secondary battery, a method for producing the same, a nickel-based active material formed therefrom, and a lithium secondary battery including a positive electrode containing the same are presented. |