▎ 摘　　要

NOVELTY - Preparing lithium-ion battery cathode material involves adding regenerated tin refining alkali slag into water, soaking at 55-65degrees Celsius for 1-2 hours, filtering to obtain a soaking solution, adding calcium hydroxide to soaking solution, reacting for 5-8 hours under the conditions of a rotating speed of 300-500 revolutions/minute (rpm) and temperature of 30-40degrees Celsius, filtering to remove the filtrate, drying filter cake to obtain adding material, mixing adding material with graphene and bonding agent uniformly, and maintaining the temperature at 400-500degrees Celsius to obtain cathode material. USE - Method for preparing lithium ion battery cathode material for lithium battery used as green high-energy rechargeable battery for electric appliances. ADVANTAGE - The lithium battery cathode composite material has improved conductivity, increased time resistance, and capacity, and reduces resource waste through recycling of regenerated tin refined alkali slag. The adhesive molecule in electronic system is increased, and the electron is enhanced, which ensures conductivity of cathode, so that charging and discharging of lithium battery is not affected.