Nickel-based active material precursor for lithium secondary battery, method of preparing the same, nickel-based active material for lithium secondary battery formed therefrom, and lithium secondary battery including positive electrode including nickel-based active material

A nickel-based active material precursor for a lithium secondary battery, the nickel-based active material precursor comprising a particulate structure comprising a core portion, an intermediate layer portion on the core portion, and a shell portion on the intermediate layer portion,

• wherein
• the nickel-based active material precursor comprises nickel (Ni),
• the intermediate layer portion and the shell portion comprise primary particles radially arranged on the core portion,
• each of the core portion and the intermediate layer portion comprises a cation or anion different from that of the shell portion,
• the cation comprises at least one selected from 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 comprises at least one selected from phosphate (PO4), BO2, B4O7, B3O5, and F.