▎ 摘　　要

NOVELTY - Preparation of graphene-coated electrode material involves preparing aqueous manganese sulfate solution, mixing with sodium carbonate, complexing agent and ammonia, adding to reactor, heating, adjusting pH of resultant slurry, stirring, centrifuging, washing with distilled water, drying, obtaining precursor, mixing with lithium carbonate or lithium hydroxide, adding calcination furnace, calcining, obtaining lithium-manganese oxide, adding graphite material, dispersing, centrifuging, drying, placing in furnace under protective atmosphere and drying. USE - Preparation of graphene-coated electrode material used for lithium battery. ADVANTAGE - The method enables preparation of graphite-coated electrode material having high lithium conductivity. The lithium battery provided using the graphite-coated electrode material has high specific capacity. DETAILED DESCRIPTION - Preparation of graphene-coated electrode material involves preparing aqueous manganese sulfate solution having concentration of 1-3 mol/L, mixing with sodium carbonate, complexing agent and 0.1-0.4 mol/L ammonia, adding to reactor at flow rate of 5-20 L/minute, heating at 50-60 degrees C using water bath, adjusting pH of resultant slurry to 6.5-8.5, stirring at 500-650 rpm, centrifuging, washing with distilled water, drying at 50-100 degrees C, obtaining precursor, mixing with lithium carbonate or lithium hydroxide, adding calcination furnace, calcining at 400-600 degrees C for 3-6 hours, calcining at 700-900 degrees C for 10-25 hours, obtaining lithium-manganese oxide, adding graphite material, ultrasonically dispersing for 0.5-2 hours, centrifuging, drying at 60-120 degrees C, placing in furnace under protective atmosphere and drying at 400-700 degrees C for 0.5-3 hours.