▎ 摘　　要

NOVELTY - The method involves using the graphene oxide as a growth template to grow nanometer lithium manganese phosphate crystals in situ on the graphene oxide. The graphene oxide is reduced to graphene, and the graphene is coated on the surface of the nano lithium manganese phosphate crystal. The lithium manganese phosphate-graphene composite material is obtained. The antioxidant includes carotenoids and derivatives, ascorbic acid, ascorbyl palmitate, erythorbic acid and sodium erythorbate. The inert gas includes helium, argon and nitrogen. The polyols include low-carbon polyols and/or polymeric polyols. The low-carbon polyol includes ethylene glycol, propylene glycol, glycerol, butanediol, butanetriol, and butanetriol. USE - Method for preparing lithium manganese phosphate-graphene composite material. ADVANTAGE - The method enables preparation of lithium-manganese phosphate-graphene composite material with improved lithium ion mobility and conductivity. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the SEM image of a lithium manganese phosphate-graphene composite material.