▎ 摘　　要

NOVELTY - Preparation of doped graphene composite graphite cathode material involves adding doped graphene, graphite, additives to supercritical fluid, doping doped graphene with 0.5-5 wt.% sulfur, 0.5-5 wt.% nitrogen, and 0.1-2 wt.% phosphorus, mixing to obtain mixture, drying the obtained mixture, and calcining at 300-800 degrees C for 0.5-2 hours. The mass ratio of graphite and supercritical fluid is preferably 1:1. The mass ratio of doped graphene and graphite is 1:1-100 and the weight ratio of additive and doped graphene is 0.1-100%. USE - Preparation of doped graphene composite graphite cathode material for lithium ion batteries (claimed). ADVANTAGE - The process provides cathode material which has improved electrochemical performance.