▎ 摘　　要

NOVELTY - The method involves dissolving layered nickel lithium manganate powder into liquid acrylonitrile oligomer solution. The liquid acrylonitrile oligomer solution is stirred for 8-72 hours and heated at a temperature of 2201 degrees centigrade. Graphene coated lithium-rich layer nickel lithium manganate is obtained by transferring the liquid acrylonitrile oligomer solution to a muffle furnace and heating at a temperature of 750 degrees centigrade for a time period of 5-40 hours. USE - Method for preparing graphene coated lithium-rich layer nickel lithium manganate for a Li-ion battery. ADVANTAGE - The method enables ensuring high structure stability, excellent electrochemical performance and better circulation stability of the lithium-rich layer nickel lithium manganate in an effective manner. DESCRIPTION OF DRAWING(S) - The drawing shows a graph illustrating of a graphene coated lithium-rich layer nickel lithium manganate preparing method.'(Drawing includes non-English language text)'