LITHIUM-RICH SOLID SOLUTION POSITIVE ELECTRODE COMPOSITE MATERIAL AND METHOD FOR PREPARING SAME, LITHIUM ION BATTERY POSITIVE ELECTRODE PLATE AND LITHIUM ION BATTERY

摘要

Embodiments of the present invention provide a lithium-enriched solid solution anode composite material, which includes xLi 2 MnO 3 ·(1-x)MO and a LiMePO 4 layer that is clad on a surface of xLi 2 MnO 3 ·(1-x)MO, where x1, M is one or more selected from: Ni, Co, Mn, Ti, and Zr, and Me is one or more selected from: Co, Ni, V, and Mg. The lithium-enriched solid solution anode composite material has high stability in an electrolyte, may improve a cycle life, discharge capacity, rate performance, and initial charge-discharge efficiency of a lithium-ion battery, and is applicable in a condition of a high voltage greater than 4.6V. The embodiments of the present invention further provide a preparation method for the lithium-enriched solid solution anode composite material, a lithium-ion battery anode plate containing the lithium-enriched solid solution anode composite material, and a lithium-ion battery containing the lithium-ion battery anode plate.