▎ 摘　　要

NOVELTY - A nano lithium titanate/graphene composite cathode material is formed by uniformly distributing graphene (0.5-20 weight%) to nano lithium titanate (80-99.5 weight%). USE - Nano lithium titanate/graphene composite cathode material is used for lithium ion battery. ADVANTAGE - The nano lithium titanate/graphene composite cathode material has high phase purity, and can be manufactured by simple method. The lithium ion battery using nano lithium titanate/graphene composite cathode material has excellent electrochemical performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of nano lithium titanate/graphene composite cathode material. Nano-lithium titanate is prepared by mixing titanium dioxide with lithium source uniformly, such that molar ratio of lithium with respect to titanium is 0.8-0.9:1, ball-milling, drying, mixing titanium dioxide powder and lithium source, obtaining micro lithium titanate powder, and sintering. The obtained nano lithium titanate powder is uniformly stirred, ultrasonically processed and dried to obtain composite cathode material precursor powder. The obtained composite cathode material precursor powder is heat treated, calcined under protective atmosphere, and maintained to obtain graphene composite cathode material.