▎ 摘　　要

NOVELTY - Modified graphene composite cathode material comprises 20-35 pts. wt. graphene, 5-10 pts. wt. biochar, 5-10 pts. wt. calcium levofolinate, 2-18 pts. wt. 2-acrylamido-2-methylpropanesulfonic acid, 6-15 pts. wt. tin tetrafluoride, 4-8 pts. wt. carbodiimide, 2-5 pts. wt. butyl titanate and 6-10 pts. wt. (acetylacetonato)dicarbonyliridium. USE - Modified graphene composite cathode material is useful in a lithium ion battery. ADVANTAGE - The modified graphene composite cathode material has excellent electrical conductivity, discharge specific capacity and tap density, stable performance and high recycling rate. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the method for preparing the modified graphene composite cathode material.