Lithium-containing transition metal composite oxide, positive electrode active material for lithium secondary battery, positive electrode for lithium secondary battery, lithium secondary battery, and method for producing lithium-containing transition metal composite oxide

摘要

To provide a lithium-containing transition metal complex oxide having good output characteristics. A lithium-containing transition metal complex oxide comprising secondary particles formed by aggregation of primary particles capable of doping and dedoping lithium ions. (1) It is represented by the following formula (I). Li [Lix (Ni (1-y-z-w) CoyMnzMw) 1-x] O2 (I) (2) From the X-ray photoelectron spectroscopy analysis, the surface of the secondary particle and the inside of the secondary particle The γ value of the surface of the secondary particle is calculated as γ1, and the γ value of the inside of the secondary particle is γ2, the γ1 and γ2 satisfy the condition of the following formula (II). 0.3 ≦ γ1 / γ2 ≦ 1.0 (II) 【Selection chart】 None