| 摘要 |
Provided are a cathode active material for a non-aqueous electrolyte secondary battery with high operating voltage, high volume capacity density, high safety and excellent charge and discharge cyclic properties, and its production method. The cathode active material for a non-aqueous electrolyte secondary battery, which comprises a lithium-containing composite oxide powder, which is represented by the formula Li<SUB>p</SUB>N<SUB>x</SUB>M<SUB>y</SUB>O<SUB>z</SUB>F<SUB>a </SUB>(wherein N is at least one element selected from the group consisting of Co, Mn and Ni, M is at least one element selected from the group consisting of Al, alkaline earth metal elements and transition metal elements other than the element N, 0.9<=p<=1.1, 0.965<=x<1.00, 0<y<=0.035, 1.9<=z<=2.1, x+y=1 and 0<=a<=0.02), a surface layer of which contains zirconium, and the surface layer within 5 nm of which has an atomic ratio (zirconium/the element N) of at least 1.0.
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