▎ 摘　　要

NOVELTY - A lithium titanate/graphene composite cathode material preparing method involves mixing lithium titanate and graphene oxide, and performing reduction by a reducing agent, dispersing graphene oxide in solvent ultrasonically to obtain graphene oxide solution, preparing pure-phase lithium titanate by a hydrothermal process, and dissolving in anhydrous ethyl alcohol to obtain white suspension, which is stirred with graphene oxide and reducing agent to obtain mixture. The mixture is transferred to reaction kettle to react, to obtain reacted product, which is cooled, washed, centrifuged and dried. USE - Method for preparing a lithium titanate/graphene composite cathode material that is utilized in lithium ion battery for portable electronic equipment, electromobiles and energy storage equipment. ADVANTAGE - The method enables preparing the lithium titanate/graphene composite cathode material with high specific capacity, good high rate performance and excellent cycle performance, in a simple manner. DETAILED DESCRIPTION - A lithium titanate/graphene composite cathode material preparing method involves mixing lithium titanate and graphene oxide, and performing reduction by a reducing agent, dispersing graphene oxide in solvent ultrasonically for 0.5-5 hours to obtain graphene oxide solution, preparing pure-phase lithium titanate by a hydrothermal process, and dissolving in anhydrous ethyl alcohol under magnetic stirring to obtain white suspension. The white suspension is added with graphene oxide and reducing agent, and stirred for 0.5-3 hours to obtain mixture. The mixture is transferred to PTFE liner-containing stainless steel high pressure reaction kettle to react at 60-150 degrees C for 2-24 hours, and cooled to a room temperature to obtain reacted product. The reacted product is washed, centrifuged and dried to obtain a finished product.