▎ 摘　　要

NOVELTY - Preparation of composite aerogel involves dissolving flaky graphene oxide in a solvent to obtain graphene oxide solution, adding carbon nanotubes to 2-10 mg/mL graphene oxide solution, ultrasonically dispersing to obtain mixed solution, adjusting mixed solution to pH of 7-8, then adding ethylenediamine reducing agent, sealing the container of the solution, magnetically stirring for 3-5 minutes, subjecting to hydrothermal reaction under a protective gas to obtain hydrogel, purifying, freezing and placing frozen hydrogel in tray of lyophilizer to maintain vacuum of 10 Pa or less and freeze-drying for 24-48 hours to obtain composite aerogel. USE - Preparation of composite aerogel. ADVANTAGE - The preparation uses flaky graphene oxide and carbon nanotubes powder as main raw material to avoid the graphene structure curling, breaking and stacking in aerogel.