▎ 摘　　要

NOVELTY - Preparing nitrogen-doped graphene-based carbon aerogel microspheres involves: (S1) mixing resorcinol, formaldehyde, catalyst anhydrous sodium carbonate, graphene oxide, melamine and deionized water to obtain a reaction solution; (S2) adding the reaction solution to a surfactant and stirring to obtain a uniformly dispersed red-brown emulsion; (S3) subjecting the red-brown emulsion to sol-gel reaction, aging by using an acetone solution containing trifluoroacetic acid, soaking in acetone and frequently pressing and drying to obtain an organic aerogel; (S4) carbonizing the organic aerogel to obtain graphene-based carbon aerogel microspheres; (S5) activating the microspheres with potassium hydroxide to obtain a spherical carbon aerogel; and (S6) activating the spherical carbon aerogel by carbon dioxide by heating the spherical carbon aerogel and heat treating, introducing carbon dioxide under the condition of heat preservation for 3-4 hours, cooling and drying. USE - The method is useful for preparing nitrogen-doped graphene-based carbon aerogel microspheres, which are useful for lithium-ion capacitor assembly (claimed). ADVANTAGE - The method prepares the nitrogen-doped graphene-based carbon aerogel microspheres with moderate particle size, high bulk density and porosity, highly effective specific surface area, and excellent conductivity and wettability with the electrolyte. DETAILED DESCRIPTION - Preparing nitrogen-doped graphene-based carbon aerogel microspheres involves: (S1) mixing resorcinol, formaldehyde, catalyst anhydrous sodium carbonate, graphene oxide, melamine and deionized water to obtain a reaction solution; (S2) adding the reaction solution to a surfactant and stirring to obtain a uniformly dispersed red-brown emulsion; (S3) subjecting the red-brown emulsion to sol-gel reaction, aging for 44-48 hours by using an acetone solution containing trifluoroacetic acid, soaking in acetone for 48-120 hours and frequently pressing and drying to obtain an organic aerogel; (S4) carbonizing the organic aerogel to obtain graphene-based carbon aerogel microspheres; (S5) activating the microspheres with potassium hydroxide to obtain a spherical carbon aerogel; and (S6) activating the spherical carbon aerogel by carbon dioxide by heating the spherical carbon aerogel at a heating rate of 3-5 degrees C/minute to 800-1000 degrees C under a nitrogen atmosphere and heat treating for 1 hours, introducing carbon dioxide under the condition of heat preservation for 3-4 hours, cooling to room temperature under the protection of nitrogen after activation, and drying, where the ventilation rates of carbon dioxide and nitrogen are both 100-120 ml/minute.