POLYCRYSTALLINE LITHIUM MANGANESE OXIDE PARTICLES, METHOD FOR PREPARING SAME, AND ANODE ACTIVE MATERIAL CONTAINING POLYCRYSTALLINE LITHIUM MANGANESE OXIDE PARTICLES

摘要

Provided are polycrystalline lithium manganese oxide particles represented by Chemical Formula 1 and a method of preparing the same: €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒChemical Formula 1€ƒ€ƒ€ƒ€ƒ€ƒLi (1+x) Mn (2-x-y-f) Al y M f O (4-z) where M is sodium (Na), or two or more mixed elements including Na, 0‰¤x‰¤0.2, 0y‰¤0.2, 0f‰¤0.2, and 0‰¤z‰¤0.2. According to an embodiment of the present invention, limitations, such as the Jahn-Teller distortion and the dissolution of Mn 2+ , may be addressed by structurally stabilizing the polycrystalline lithium manganese oxide particles. Thus, life characteristics and charge and discharge capacity characteristics of a secondary battery may be improved.