▎ 摘　　要

NOVELTY - Preparation of three-dimensional porous graphene-based structural carbon material comprises carbonizing Iris lactea at 350-450 degrees C under inert gas atmosphere for 1-2 hours, cooling, and grinding into a powder; dissolving in zinc chloride solution, stirring, standing, and drying; and calcining dried mixture at 600-800 degrees C for 1-3 hours under inert gas. USE - The method is used for preparing three-dimensional porous graphene-based structural carbon material for lithium battery cathode material (claimed). ADVANTAGE - The carbon material has good charge transport capability and ion transport capability and improved specific capacity after charge and discharge cycle.