▎ 摘　　要

NOVELTY - Preparing graphene carbon nanotube composite aerogel electrode material, comprises e.g. (i) mixing 1-bromo-n-alkane or brominated alkane with N-methylimidazole, magnetically stirring, then washing using ethyl acetate, then adding acetonitrile to the washed crude product, heating to dissolve the intermediate, repeating above washing steps until to obtain clear and transparent viscous product, ad drying to obtain imidazole-based ionic liquid, (ii) gradually adding potassium permanganate to the mixture of concentrated sulfuric acid and graphite flakes, magnetically stirring, slowly adding distilled water, and stirring the mixture, (iii) orderly adding distilled water and hydrogen peroxide to the second product, centrifuging, dispersing in hydrogen chloride, and centrifuging, (iv) repeating step (iii), then collecting graphene oxide and drying to obtain graphene oxide, (v) sequentially oxidizing the single-walled carbon nano-tube, acidifying and post processing. USE - The method is useful for preparing graphene carbon nano-tube composite aerogel electrode material. ADVANTAGE - The composite electrode material has excellent plasticity, thermal stability, electrical conductivity, high specific surface area and relatively excellent electrochemical properties. DETAILED DESCRIPTION - Preparing graphene carbon nanotube composite aerogel electrode material, comprises (i) mixing 1-bromo-n-alkane or brominated alkane with N-methylimidazole, magnetically stirring at 60 degrees C on oil bath for 24 hours, removing the supernatant, then washing using ethyl acetate to generate viscous product, fully stirring, removing supernatant, then adding acetonitrile to the washed crude product, heating to dissolve the intermediate, repeating above washing steps until to obtain clear and transparent viscous product, adding to a vacuum drying box and drying at 60 degrees C for 24 hours to obtain imidazole-based ionic liquid, where the mass ratio between N-methylimidazole, 1-bromo n-alkane, acetonitrile and ethyl acetate is 1-5:5-10:any:any, (ii) gradually adding 5-10 g potassium permanganate to the mixture of 50-100 ml concentrated sulfuric acid and 1-10 g graphite flakes, cooling in an ice bath, then magnetically stirring at 50 degrees C for 0.5-1 hour, slowly adding 50-100 ml distilled water, stirring the mixture at 95 degrees C for another 10-30 minutes, (iii) orderly adding 200-300 ml distilled water and 30 wt.% of 10-30 ml hydrogen peroxide to the second product, centrifuging the reaction mixture at a speed of 5000 revolutions/minute, dispersing in 10 wt.% of 300-500 ml hydrogen chloride, and then centrifuging the dispersion, (iv) repeating step (iii) for 3 times until pH value of the supernatant reaches to 5-7, then collecting graphene oxide from the centrifuge and drying at 60 degrees C under vacuum to obtain graphene oxide, (v) sequentially oxidizing the single-walled carbon nano-tube under air atmosphere at 400 degrees C for 2 hours, acidifying with concentrated hydrochloric acid for 24 hours to obtain preliminary purified product of SWNTs, preliminary purifying 100-200 mg SWNTs, then adding 150-200 ml of 0.2 mol/L potassium peroxodisulfate solution, ultrasonically breaking and dispersing at 10 degrees C for 1-2 hours, then adding 97 wt.% of 12.5-15 ml concentrated sulfuric acid to the reaction system, placing in a oil bath and magnetically stirring at 60 degrees C and refluxing for 24-36 hours, cooling the system, pouring the upper yellow solution, the lower black component undergoes multiple pouring-dispersing steps until form stable suspension, filtering the suspension using 1 mu m polytetrafluoroethylene (PTFE) filter, drying the obtained filter cake under vacuum at 100 degrees C for 8 hours to obtain oxidized single-walled carbon nano-tubes, (vi) taking 1 mg graphene oxide and single-walled carbon nano-tubes, placing in 1-2 wt.% of 100 ml imidazole-based ionic liquid and ultrasonically dispersing to obtain graphene oxide dispersion and oxidized single-walled carbon nanotube dispersion, and (vii) adding equal volume of graphene oxide dispersion and oxidized single-walled carbon nanotube dispersion to the PTFE liner, adjusting pH value of the mixed solution to 8-13 using dilute aqueous ammonia having concentration of 2-5 mol/l, placing the PTFE liner in the reaction kettle, adding to a blast drying oven and drying at 60 degrees C for 1-24 hours, then adding to a semi-permeable membrane, carrying out ion exchange purification, suction filtering, refrigerating at -25 degrees C for 36-48 hours to obtain final product.