| abstract |
The present invention provides polycrystalline lithium manganese oxide particles represented by the following formula (1) and a method for producing the same. Li (1 + x) Mn ( 2-x-y-f) Al y M (f) O (4-z) (1) In the above formula, M is any one selected from the group consisting of B, Co, V, La, Ti, Ni, Zr, Y and Ga, or two or more of these elements, and 0 ≦ x ≦ 0.2, 0 <y ≦ 0.2, 0 <f ≦ 0.2 and 0 ≦ z ≦ 0.2. According to an embodiment of the present invention, the polycrystalline lithium manganese oxide particles are structurally stabilized to solve the problem of Jahn-Teller distortion and Mn 2+ elution. The life characteristics and charge / discharge capacity characteristics of the secondary battery can be improved. |