abstract |
A cathode active material for a nonaqueous electrolyte secondary battery having high operating voltage, high volume capacity density, high safety, and good charge / discharge cycle characteristics, and a manufacturing method. Formula Li p N x M y O z F a (Wherein N is at least one element selected from the group consisting of Co, Mn and Ni, and M is at least one kind selected from the group consisting of transition metal elements other than element N, Al and alkaline earth metal elements) Element 0.9 p 1.1, 0.965 x <1.00, 0 <y 0.035, 1.9 z 2.1, x + y = 1, 0 a 0.02), and a nonaqueous electrolyte secondary characterized by comprising a lithium-containing composite oxide powder containing zirconium in the surface layer and having an atomic ratio of (zirconium / element N) within 5 nm of the surface layer of 1.0 or more. Cathode active material for battery. |