The positive electrode active material for lithium ion secondary battery

Even when a high voltage was charged, to provide a positive active material for a lithium ion secondary battery excellent in cycle characteristics. And li, Ni, at least one transition metal element and the surface of the particles (1) consisting of a lithium-containing composite oxide containing selected from the group consisting of Co and Mn, and Al, Y, from the group consisting of Gd and Er the positive electrode active material for at least a lithium ion secondary battery type and is present selected.