MANGANESE NICKEL COMPOSITE HYDROXIDE AND METHOD FOR PRODUCING SAME, LITHIUM MANGANESE NICKEL COMPOSITE OXIDE AND METHOD FOR PRODUCING SAME, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

A manganese nickel composite hydroxide which serves as a starting material for positive electrode active materials for secondary batteries, and the secondary battery having low resistance and high output characteristics. A manganese nickel composite hydroxide according to the present invention is represented by general formula (A) Mn_1−x−yNi_xM_y(OH)_2+α (wherein 0≤×≤0.27, 0≤y≤0.05, 0≤α≤0.5, and M represents at least one element selected from among Mg, Al, Ca, Ba, Sr, Ti, V, Fe, Cr, Co, Cu, Zr, Nb, Mo and W), and has an SO₄ content of 0.90% by weight or less, an Na content of 0.04% by weight or less, a BET specific surface area of from 40 m²/g to 70 m²/g (inclusive), and a value obtained by [(d₉₀ -d₁₀)/(average particle diameter)] of 0.90 or less, said value being an index indicating the expanse of the particle size distribution.