▎ 摘　　要

NOVELTY - The method involves dissolving the nickel source, cobalt source, manganese source and lithium source to obatin the magnetic stirring solution. The uniform ammonia solution is prepared by adding dropwise solution. The polydiallyldimethylammonium chloride (PDDA) is added to the suspension and heated in a water bath under stirring to collect filter cake at atmospheric pressure. The cake is dried and subjected to carbonization treatment under a protective atmosphere to obtain the graphene-coated nickel-cobalt-manganese lithium ion battery cathode material. USE - Preparation method for graphene-coated nickel-cobalt-manganese lithium ion battery cathode material. ADVANTAGE - The charging and discharging of the lithium ion battery cathode material is effectively improved. The specific capacity is high. The cyclical stability is good. The preparation method is simplified. DESCRIPTION OF DRAWING(S) - The drawing shows a transmission electron microscopic image of graphene coated nickel cobalt manganese lithium anode material of lithium ion battery.