| abstract |
Provided is a surface-modified lithium-containing composite oxide for a positive electrode active material for a lithium ion secondary battery having excellent volume capacity density, safety, charge / discharge cycle durability, and rate characteristics, and a method of manufacturing the same.n n n Li p N x M y O z F a (where N is at least one element selected from the group consisting of Co, Mn and Ni, and M is a transition metal element other than N, Al, Sn and alkaline earth metals) At least one element selected from the group consisting of elements 0.9 p 1.3, 0.9 x 2.0, 0 y 0.1, 1.9 z 4.2, 0 a 0.05) impregnated particles of a lithium-containing composite oxide with a solution containing a lanthanoid source and a titanium source, and then heat-treated at 550 to 1000 ° C. to have a perovskite structure containing no fluorine in the surface layer of the particles. A surface-modified lithium-containing composite oxide containing a high crystalline lithium lanthanoid titanium composite oxide is prepared. |