▎ 摘　　要

NOVELTY - A lithium titanate/lithium ion conductor/carbon composite material comprises lithium titanate inner core, lithium ion conductor middle layer and carbon material outer shell layer from inside to outside. USE - The lithium titanate/lithium ion conductor/carbon composite material is used for cathode sheet and secondary battery (all claimed). ADVANTAGE - The material is not easy to expand gas, and has excellent electron/ion transmission performance, good high and low temperature characteristics, good structure stability, excellent fast charging performance and high safety. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing lithium titanate/lithium ion conductor/carbon composite material comprising dissolving lithium source and other source compound in solvent, adding complexing agent for heat mixing reaction to obtain lithium ion conductor precursor liquid, mixing lithium titanate and lithium ion conductor precursor liquid, adding precipitator to precipitate, separating to obtain co-precipitation substance, calcining under inert atmosphere to obtain lithium titanate/lithium ion conductor composite material, mixing with carbon material solution, and orderly performing drying treatment and low temperature heat treatment.