Patent ID: 8986570
Filing Date: 2015-03-24
Classification: H01M,Y02E,Y02P

Abstract:
1. A method for producing a positive electrode active material for a lithium secondary battery constituted by a lithium-nickel-cobalt-manganese complex oxide with a lamellar structure having lithium, nickel, cobalt, and manganese as essential constituent elements, the method comprising: preparing a starting source material for producing a complex oxide represented by the following formula: where, x, a, b, c, and d are numbers satisfying all of the following conditions: Me is one or two or more element selected from the group consisting of V, Nb, Ta, Mo, and W, wherein the starting source material comprises a nickel-cobalt-manganese complex hydroxide including Ni, Co, Mn and the Me element in the formula (1) and a lithium supply source, and the starting source material is prepared such that a molar ratio (Li/M pre-firing the starting source material by heating at a pre-firing temperature that has been set to a temperature lower than 800° C. and higher than a melting temperature of the lithium supply source; and firing the pre-fired material obtained in the pre-firing step by raising a temperature to a temperature range higher than the pre-firing temperature.