POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY AND METHOD FOR MANUFACTURING THE SAME

A positive electrode active material for a lithium ion secondary battery, including: lithium-nickel composite oxide particles; and coating layers, in which the lithium-nickel composite oxide particles have a crystal structure belonging to a space group R-3m, contain at least Li, Ni, Mn and an element M, a mole number ratio among the elements being represented by Li:Ni:Mn:M=a:(1−x−y):x:y (0.95≤a≤1.10, 0