Lithium metal composite oxide powder, positive electrode active material for lithium secondary batteries, positive electrode, and lithium secondary battery

Abstract

A lithium metal composite oxide powder has a layered structure, and includes at least Li, Ni, an element X, and an element M. The element X is at least one element selected from the group consisting of Co, Mn, Fe, Cu, Ti, Mg, Al, W, Mo, Nb, Zn, Sn, Zr, Ga and V. The element M is at least one element selected from the group consisting of B, Si, S and P. A molar ratio of Ni to a sum of Ni and the element X, Ni/(Ni+X), is 0.40 or more. A molar ratio of the element M to a sum of Ni and the element X, M/(Ni+X), is more than 0 and 0.05 or less. The lithium metal composite oxide powder has core particles and coatings. The coatings including the element M at a concentration of more than 0.0185 mol/cm3 and 0.070 mol/cm3 or less.

Dependencies are inferred from the claim text.