▎ 摘　　要

NOVELTY - Preparing graphene quantum dot composite material for lead-acid battery, comprises (a) adding auxiliary agent into the graphene powder and stirring for 5-10 minutes, adding pure water with 2.5-3.5 times the weight of graphene while stirring, carrying out dispersion treatment, heating to 120-200℃ and stirring for 4-5 hours to obtain premix A; (b) adding 2.5-3.5 times of pure water into the carbon nanotubes, adding nonylphenol polyoxyethylene ether and 2-aminoethanol to carry out dispersion treatment, heating to 80-85℃ and stirring for 1-2 hours to obtain premix solution B; (c) adding the premix solution B into the premix solution A and expansion agent, and ultrasonically treating in a water bath at 40-60℃ for 1-3 hours, and placing into a high-speed mixer and stirring at a speed of 6000-8000 revolutions/minute for 5-8 hours to obtain the slurry of graphene quantum dot composite material; and (d) filtering, drying and crushing the slurry. USE - The method is useful for preparing graphene quantum dot composite material for lead-acid battery. ADVANTAGE - The graphene quantum dot composite material for lead-acid battery can effectively improve the service life and stability of lead-acid battery.