▎ 摘　　要

NOVELTY - Method for preparing graphene aerogel, involves (a) preparing bacterial cellulose and (b) preparing graphene/metal salt/bacterial cellulose hydrogel composite material, where the step (a) further involves (1a) soaking a bacterial cellulose hydrogel in deionized water for 2 days and replacing the deionized water every day to remove impurities in the cellulose hydrogel and (2a) covering the soaked bacterial cellulose hydrogel with a heavy object for 2 days to remove the water in the hydrogel. The step (b) further involves (1b) dispersing graphene in deionized water, adding metal salts, mixing and stirring for 20-40 minutes, (2b) adding the bacterial cellulose into the mixed solution and stirring in a water bath at 26-50 degrees C for 1-3 hours, so that the bacterial cellulose can fully absorb the solution to obtain the bacterial cellulose hydrogel, and (3b) freezing the cellulose hydrogel into a freeze dryer for 6-10 hours and drying for 12 hours to obtain the composite material. USE - The method is useful for preparing graphene aerogel. ADVANTAGE - The graphene aerogel has excellent structural stability, electronic conductivity and ionic conductivity.