▎ 摘　　要

NOVELTY - Preparing graphene/carbon nanotube/silicon dioxide aerogel material, involves mixing graphene oxide, carbon nano tubes, water glass, silica gel, polydopamine and urea in ratio of 1: (0.25-1.5):(2-4):(1-3):(3-5):(3-8), putting the mixture into a stirring tank according to the mass ratio, uniformly stirring and mixing, and performing dispersion treatment to obtain a dispersion liquid. The dispersion liquid is added into an oil bath pot, and heated at 60-110degrees Celsius for 20-50 minutes to obtain a graphene/carbon nanotube/silicon dioxide aerogel mixture. The freeze drying treatment is carried out on the graphene/carbon nanotube/silicon dioxide aerogel mixture to obtain a blank. The blank is washed with aqua regia, removed impurity ions, washed with deionized water, until the pH is neutral, and dried to obtain graphene/carbon nanotube/silicon dioxide aerogel. USE - Method for preparing graphene/carbon nanotube/silicon dioxide aerogel material, used for lithium-ion battery. ADVANTAGE - The method does not need to add alcohol solvent in the preparation process, is eco-friendly, and does not process the waste liquid, reduces the production cost, and is good for realizing industrial continuous production. The prepared composite gas material gel resists high temperature of more than 500degrees Celsius. DETAILED DESCRIPTION - Preparing graphene/carbon nanotube/silicon dioxide aerogel material, involves mixing graphene oxide, carbon nano tubes, water glass, silica gel, polydopamine and urea in ratio of 1: (0.25-1.5):(2-4):(1-3):(3-5):(3-8), putting the mixture into a stirring tank according to the mass ratio, uniformly stirring and mixing, and performing dispersion treatment to obtain a dispersion liquid. The dispersion liquid is added into an oil bath pot, and heated at 60-110degrees Celsius for 20-50 minutes to obtain a graphene/carbon nanotube/silicon dioxide aerogel mixture. The freeze drying treatment is carried out on the graphene/carbon nanotube/silicon dioxide aerogel mixture to obtain a blank. The blank is washed with aqua regia, removed impurity ions, washed with deionized water, until the pH is neutral, and dried to obtain graphene/carbon nanotube/silicon dioxide aerogel. The discharge plasma sintering is performed on the graphene/carbon nanotube/silicon dioxide aerogel by using nitrogen as a protective gas at 500-700degrees Celsius for 0.5-8 minutes to obtain target product.