▎ 摘　　要

NOVELTY - The preparation of a coal-based artificial graphite cathode material involves: crushing coke powder (raw material) until the granularity is less than 30 ~mm, mixing the crushed coke coal powder material with an acid solution, grading the powder and mixing to obtain a raw material A; taking at least one of acicular petroleum coke, calcined coke or delayed coke as a raw material B, mixing the raw materials A and B to obtain an AB mixture, adding petroleum asphalt micropowder C to obtain an ABC mixed material, and carbonizing the ABC mixed material at 1000-1200?oC; adding boron or a boron compound into the carbonized ABC mixture and graphitizing at 2000-3000?oC for 2-10 hours under inert gas; crushing and shaping the graphitized ABC mixed material, adding a raw material D comprising natural graphite, lithium silicide, a silicon-carbon material, graphene and/or expanded graphite to prepare the ABCD mixed material; and performing mechanical ball milling treatment. USE - Preparation method of coal-based artificial graphite cathode material used in lithium ion battery of notebook computers, mobile phones, new energy vehicles, electric vehicles, charging power supplies, power tools, and digital communication equipment. ADVANTAGE - The method is capable of reducing the raw material cost, has high multiplying power performance and large current charging and discharging capability, and provides coal-based artificial graphite cathode material with good battery processing performance, at the same time, it has low cost, high rate, high capacity rate and long service life. The invention discloses a preparation method of a coal-based artificial graphite negative electrode material. The coke coal powder is dried, pulverized, impurity-removed, grading, and grading so that the particle size of the coking coal powder meets the production requirements, and the grading optimizes its particle size distribution range. Obtain raw material A; at least one of needle petroleum coke, calcined coke or delayed coke is raw material B. After mixing A and B raw materials in a certain proportion, add petroleum pitch fine powder C to mix, and the obtained material is carried out at 12001500degrees Celsius Carbonization: After adding boron or boron compound to the carbonized material, select it to be graphitized at 28003200degrees Celsius. After crushing and shaping, add raw material D for mechanical ball milling; use cheap coking coal as raw material and adopt mature carbon industry The process is to prepare the artificial graphite negative electrode material with good battery processing performance, and at the same time has the characteristics of low cost, high rate, high capacity rate and long life.