| abstract |
Proposed is a novel lithium metal composite oxide having a layered structure, which is capable of improving the cycle characteristics if used as a positive electrode active material for a battery.nProposed is a lithium metal composite oxide having a layered structure, which is represented by Li 1+x Ni 1-x-α-β-γ Mn α Co β M γ O 2 (wherein 0 ≤ x ≤ 0.1, 0.01 ≤ α ≤ 0.35, 0.01 ≤ β ≤ 0.35, 0 ≤ γ ≤ 0.05 and M comprises at least one element selected from the group consisting of Al, Mg, Ti, Fe, Zr, W and Nb), and which is characterized in that the amount of residual Li 2 CO 3 present in secondary particles is 0.03-0.3 wt%. |