CATHODE ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE RECHARGEABLE BATTERY AND MANUFACTURING METHOD FOR SAME, AND NON-AQUEOUS ELECTROLYTE RECHARGEABLE BATTERY

摘要

To provide a cathode active material for a non-aqueous electrode rechargeable battery, with which it is possible to improve input/output characteristics, particularly by reducing resistance in a low SOC state in which DCIR increases, and to provide a manufacturing method for same. The cathode active material includes layered hexagonal crystal lithium nickel manganese composite oxide particles represented by the general formula (A): Li_1+uNi_xMn_yCo_zM_tO₂ (where 0≦u≦0.20, x+y+z+t=1, 0.30≦x≦0.70, 0.10≦y≦0.55, 0≦z≦0.40, 0≦t≦0.10, and M is one or more elements selected from Al, Ti, V, Cr, Zr, Nb, Mo, and W), and further including Na, Mg, Ca and SO₄, in which the total amount of Na, Mg and Ca is 0.01 to 0.1 mass %, the amount of SO₄ is 0.1 to 1.0 mass %, and the ratio of the integrated intensity of the diffraction peak on plane (003) to that on plane (104) obtained by powder X-ray diffraction measurement using CuKα rays is 1.20 or greater.