▎ 摘　　要

NOVELTY - Preparing nano-phosphate lithium manganese/graphene composite material, comprises (i) dissolving glucose in ethanediol under nitrogen protection; and (ii) dispersing graphene oxide in solution A, taking lithium hydroxide, soluble manganese salt and phosphoric acid, dissolving lithium hydroxide in deionized water, adding lithium hydroxide solution, to obtain a homogeneous solution B, adding soluble manganese salt and phosphoric acid to deionized water, to obtain solution C, adding solution C to homogeneous solution B, and controlling boiling point of reaction solution at 130-150 degrees C. USE - The method is useful for preparing nano-phosphate lithium manganese/graphene composite material (claimed). ADVANTAGE - The method increases the diffusion rate of lithium ions and electronic conductivity in composite material by reducing the passage time of lithium-ion of solid phase into graphene having good electrical conductivity. DETAILED DESCRIPTION - Preparing nano-phosphate lithium manganese/graphene composite material, comprises (i) dissolving glucose in ethanediol under nitrogen protection at 130-150 degrees C for 1-5 hours, to obtain light yellow solution A, where the amount of glucose added is 1-20 g/100 ml ethanediol; and (ii) dispersing graphene oxide in solution A, to obtain solution A containing graphene oxide, taking lithium hydroxide, soluble manganese salt and phosphoric acid in a molar ratio of 3:1:1, dissolving lithium hydroxide in deionized water, to obtain lithium hydroxide solution, adding lithium hydroxide solution into the solution A containing graphene oxide, to obtain a homogeneous solution B, adding soluble manganese salt and phosphoric acid into deionized water, to obtain solution C, then adding solution C into homogeneous solution B, to obtain a reaction solution, and controlling boiling point of reaction solution at 130-150 degrees C by adjusting the volume ratio of deionized water and ethanediol in step (i), to 1:3.5-1.5:1.