▎ 摘　　要

NOVELTY - Nano-needle lithium titanate/carbon nanotube/graphene composite material comprises nano-needle lithium titanate, carbon nanotube and graphene in mass ratio of (0.5-80):5:(95-15). USE - The nano-needle lithium titanate/carbon nanotube/graphene composite material is useful for lithium ion capacitor. ADVANTAGE - The nano-needle lithium titanate/carbon nanotube/graphene composite material does not contain binder and conductive agent, improves the energy density of the lithium ion capacitor, and has excellent self-supporting and flexible characteristics. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation method of nano-needle lithium titanate/carbon nanotube/graphene composite material, which involves carrying out hydrothermal reaction of nano-needle lithium titanate to obtain nano-lithium titanate precursor, ultrasonically dispersing the graphene in deionized water to form suspension (A), ultrasonically dispersing carbon nanotube in deionized water to form suspension (B), mixing suspension (A) and suspension (B) and ultrasonically dispersing to form suspension (C), adding nano-lithium titanate precursor to the suspension (C) and ultrasonically dispersing to obtain suspension (D), vacuum filtering the suspension (D) to prepare nano-needle lithium titanate precursor/carbon nanotube/graphene composite material, and heat-treating the nano-needle lithium titanate precursor/carbon nanotube/graphene composite material at 500-800 degrees C for 2-6 hours under argon atmosphere.