| abstract |
A positive electrode active material for non-aqueous electrolyte secondary battery, comprising particles of a lithium transition metal complex oxide represented by the general formula: n n Li a Ni 1-x-y-z Co x Mn y M' z M" w O 2 n nwherein 1.00 ≤ a ≤ 1.25, 0 ≤ x ≤ 0.5, 0 ≤ y ≤ 0.5, 0.002 ≤ ≤ 0.01, 0 ≤ w ≤ 0.05, M' is at least one kind of an element selected from W, Mo, Nb and Ta, and M" is at least one kind of an element selected from Zr, Al, Mg, Ti, B and V, and a complex oxide of lithium, and M' exists in the region ranging from an outermost surface of positive electrode active material particles to a depth of about 1 nm in the direction of center. |