▎ 摘　　要

NOVELTY - Preparation of high-capacity graphene aerogel negative electrode material comprises weighing 30-50 mg lithium titanate precursor powder, adding 200 mL graphene/carbon nanotube dispersion liquid for three times, dispersing for 0.8-1 hours with ultrasonic waves to obtain mixed solution, sealing mixed solution in PTFE high-pressure reaction kettle, reacting at 180-200 degrees C for 10-12 hours, cooling to room temperature to obtain graphene hydrogel/carbon nanotube/lithium titanate, cleaning graphene hydrogel/carbon nanotube/lithium titanate particles with absolute ethyl alcohol, drying graphene hydrogel/carbon nanotube/lithium titanate particles, performing carbon dioxide supercritical extraction drying to obtain graphene aerogel/carbon nanotube/lithium titanate particles and heating graphene aerogel/carbon nanotube/lithium titanate particles at 1000-1200 degrees C for 3-5 hours. USE - The method is for preparation of high-capacity graphene aerogel negative electrode material. ADVANTAGE - The material has good electrochemical performance.