| abstract |
A nickel cobalt manganese composite that can be used as a precursor of a positive electrode active material for a non-aqueous electrolyte secondary battery with a small irreversible capacity, has a low impurity content, and has high reactivity when synthesizing a positive electrode active material Provide hydroxide. SOLUTION: General formula Ni x Co y Mn z M t (OH) 2 + a (where x + y + z + t = 1, 0.20 ≦ x ≦ 0.80, 0.10 ≦ y ≦ 0.50, 0.10 ≦ z) ≦ 0.90, 0 ≦ t ≦ 0.10, 0 ≦ a ≦ 0.5, M is at least one selected from Mg, Ca, Al, Ti, V, Cr, Zr, Nb, Mo, W Is a spherical secondary particle formed by agglomerating a plurality of plate-like primary particles, and the secondary particles have an average particle size of 3 μm to 20 μm and contain sulfate radicals. The amount is 1.0 mass% or less, the chlorine content is 0.5 mass% or less, and the carbonate radical content is 1.0 mass% to 2.5 mass%. [Selection figure] None |