| 摘要 |
The present invention relates to a positive electrode material for secondary battery and the preparation method thereof, wherein the said positive electrode material comprises Li x Ni 1-y-z Co y Me z O 2±n as the main component, 0.9‰¤x‰¤1.1, 0<y‰¤0.3, 0‰¤z‰¤0.1, 0‰¤n‰¤0.1 and Me is selected at least one or two elements from the group consisting of Mg, Zn, Mn, Co, A1 and Ca in the formula, and Li v Ni 1-a Me' a O 2±m or Li x Ni 1-y Me" y PO 4 existed on the polycrystalline surface of the main component and/or among the crystal phase of the main component. The proportion of peak intensity ratio of (003) to (104) of the positive electrode material in the polycrystalline X-ray diffraction spectrum is 2.0‰¤I (003) /I (104) ‰¤3.0. The secondary battery comprising said positive electrode material is liquid, solid or polymer lithium secondary battery or lithium ion battery. |
