MOLYBDENUM-DOPED LITHIUM-RICH MANGANESE-BASED CATHODE MATERIAL AND PREPARATION METHOD THEREFOR

摘要

A molybdenum-doped lithium-rich manganese-based cathode material, having a chemical formula as shown in formula I: formula I Li _1.2Mn _0.54-xMo _xCo _0.13Ni _0.13O ₂, wherein 0.05≤x≤0.1. By replacing manganese ions in a layered lithium-rich manganese-based material with metal cations Mo, body phase doping of the layered lithium-rich manganese-based material is realized; and the molybdenum-doped lithium-rich manganese-based cathode material is stable in structure and can effectively inhibit voltage attenuation and capacity fading in a cycle process. Further provided is a preparation method for the molybdenum-doped lithium-rich manganese-based cathode material. By using a sol-gel method for preparation, the structure stability of the obtained layered lithium-rich manganese-based cathode material is improved, and thereby cycle performance is improved and voltage drop generated in the cycle process is inhibited.