▎ 摘　　要

NOVELTY - Preparing graphene/azure A composite material comprises (i) pipetting graphene solution into aqueous solution, and uniformly dispersing to obtain graphene dispersion, (ii) measuring Azure A and adding to graphene dispersion, continuing ultrasonicating for 1-3 hours, and sealing resulting mixture in autoclave lined with polytetrafluoroethylene, hydrothermally reacting, natural cooling and collecting out, washing many times with deionized water, and drying in vacuum at 60-80℃ to obtain black solid, and (iii) purifying black solid by Soxhlet extraction until Soxhlet extractant is colorless, and vacuum drying at 60-80℃ to obtain final product. USE - The method is useful in preparing graphene/azure A composite material as anode material for lithium ion battery (claimed). ADVANTAGE - The method is simple and economical. The material has high specific surface area, good electrical conductivity, excellent long cycle life, rate performance and high specific capacity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for graphene/azure A composite material, prepared by above method.