| 摘要 |
There is provided a positive electrode active material for a non-aqueous electrolyte secondary battery, comprising a composite oxide represented by the general formula (1): (Li<SUB>1-x</SUB>M<SUB>x</SUB>)<SUB>a</SUB>(Co<SUB>1-y</SUB>M<SUB>y</SUB>)<SUB>b</SUB>O<SUB>c </SUB>where lithium and cobalt are partly replaced with element M in the crystal structure of LiCoO<SUB>c</SUB>, wherein element M is at least one selected from the group consisting of Al, Cu, Zn, Mg, Ca, Ba and Sr, and 0.02<=x+y<=0.15, 0.90<=a/b<=1.10, and 1.8<=c<=2.2 are satisfied. |
