| abstract |
The present invention relates to a nickel-based active material precursor, a method for preparing the same, a nickel-based active material, and a lithium secondary battery. The nickel-based active material precursor includes a granular structure including a core portion, an intermediate layer portion on the core portion, and a shell portion on the intermediate layer portion, wherein the intermediate layer portion and the shell portion includes primary particles radially arranged on the core portion, and the core portion and the intermediate layer portion each include a cation or anion different from that of the shell portion. The The cation includes at least one selected from the group consisting of boron (B), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), titanium (Ti), vanadium (V), tungsten (W), Chromium (Cr), iron (Fe), copper (Cu), zirconium (Zr), and aluminum (Al), and the anion includes at least one selected from the group consisting of phosphate (PO 4 ), BO 2 , B 4O7 , B3O5 , and F. |