MOLYBDENUM DOPING-MODIFIED LITHIUM MANGANESE OXIDE COMPOSITE MATERIAL, PREPARATION METHOD THEREFOR AND LITHIUM ION BATTERY

摘要

Provided in the present invention is a molybdenum doping-modified lithium manganese oxide composite material, which is molybdenum doping-modified lithium manganese oxide having a surface coated with carbon. The molybdenum doping-modified lithium manganese oxide has a chemical formula represented by formula I: LiMn_2-xMo_xO₄ formula I, wherein 0.01≤x≤0.1; the mass fraction of carbon is 0.1-20％; and the mass fraction of LiMn_2-xMo_xO₄ is 80-99.9％. The present invention uses molybdenum to dope lithium manganese oxide, which may effectively suppress the Jahn-Teller effect in the spinel structure LiMn₂O₄ as well as the dissolution of manganese, thus improving cycle stability and high temperature performance. Further provided in the present invention is a preparation method for a molybdenum doping-modified lithium manganese oxide composite material. The method has a simple process and costs are low, the method being environmentally friendly and being suitable for large-scale industrial production.