▎ 摘　　要

NOVELTY - Preparation of cathode powder of fast-charging lithium ion battery, involves subjecting carbon-containing precursor to pyrolysis treatment, crushing obtained material to micron-sized particles to obtain hard carbon or soft carbon particles, crushing high-quality coke particles, subjecting to high-temperature graphitization treatment to obtain graphite particles, adding prepared amorphous carbon particles and graphite particles to fusion agent, putting the material into tube furnace, heating to obtain porous double-layer structure of carbon particles, adding carbon particles with porous double-layer structure into high-temperature asphalt in proportion, controlling mass ratio of porous double-layered carbon particles to asphalt of 1:0.05-0.2, stirring for 1-5 hours in high-temperature reaction kettle, putting the materials into box furnace, passing inert gas to heat at 1000-1600 degrees C for 5-12 hours, to obtain carbon particles with multilayer nested structure, and sieving the materials. USE - Preparation of cathode powder used for preparing fast-charging lithium ion battery (claimed) for energy vehicles. ADVANTAGE - The method provides the cathode powder having excellent compatibility with electrolyte. The lithium ion battery has fast charging capacity of 3-8C, constant current charge capacity of 70% or more, 3C charge and discharge cycle life of 1500 times or more, 8C charge and 1C discharge cycle life of 500 times or more. DETAILED DESCRIPTION - Preparation of cathode powder of fast-charging lithium ion battery, involves preparing amorphous carbon particles by subjecting carbon-containing precursor to pyrolysis treatment, crushing material obtained from pyrolysis treatment to micron-sized particles by a pulverizer to obtain hard carbon or soft carbon particles, preparing graphite particles by crushing high-quality coke particles which are easy to graphitize to micron-sized particles through pulverizer, adding to shaping machine for morphology modification treatment, to obtain carbon particles after grading, subjecting to high-temperature graphitization treatment at more than 2900 degrees C to obtain graphite particles, preparing porous double-layered carbon particles by adding prepared amorphous carbon particles and graphite particles in proportion to fusion agent and treating in fusion machine for 1-5 hours to control amorphous carbon particles, where the mass ratio of graphite particles and fusing agent is 1:0.2-3:0.2-3, putting the material into tube furnace, introducing inert gas, heating at 300-700 degrees C for 5-12 hours to obtain porous double-layer structure of carbon particles, adding the carbon particles with porous double-layer structure into high-temperature asphalt in proportion, controlling mass ratio of porous double-layered carbon particles to asphalt of 1:0.05-0.2, stirring for 1-5 hours in high-temperature reaction kettle, putting the materials into box furnace, passing inert gas to heat at 1000-1600 degrees C for 5-12 hours, to obtain carbon particles with multilayer nested structure, and sieving the materials. An INDEPENDENT CLAIM is included for application of the cathode powder in lithium-ion battery.