| abstract |
Positive active electrode material for lithium secondary batteries comprising a mixed oxide represented by the general formula Liv Niw Mnx Coy Alz O2 wherein 0.9 ≤ v ≤ 1.2, 0.34 ≤ w ≤ 0.49, 0.34 ≤ x ≤ 0.42, 0.08 ≤ y ≤ 0.20, 0.03 ≤ z < 0.05, 0.8 ≤ w/x ≤ 1.8, -0.08 ≤ w-x ≤ 0.22, 0.12 ≤ y+z ≤ 0.25 and w+x+y+z=1. |