Patent ID: 7666551

Claim:
A positive electrode active material for a non-aqueous electrolyte secondary battery, comprising: a lithium nickel composite oxide containing lithium, nickel, and at least one metal element other than lithium and nickel; and a film layer containing lithium carbonate, aluminum hydroxide, and aluminum oxide, said layer being evenly coated on the surface of said lithium nickel composite oxide, wherein said lithium nickel composite oxide is composed such that the ratio of the nickel to the total of the nickel and said at least one metal element is 30 mol % or more, said layer is composed such that the amount of said lithium carbonate is 0.5 to 5 mol per 100 mol of said lithium nickel composite oxide, and the total of aluminum atoms contained in said aluminum hydroxide and said aluminum oxide is 0.5 to 5 mol per 100 mol of said lithium nickel composite oxide.