▎ 摘　　要

NOVELTY - Preparing graphene-based and organic micro-molecule of aqueous lithium ion super-capacitor comprises e.g. dissolving high-concentration of liquid-crystal graphene oxide/sodium chloride/urea/ammonium acetate (either ammonium carbonate or ammonium sulfate), mixing and adjusting graphene oxide concentration and stirring to obtain stable sol mixed dispersion liquid, then drying, coating resultant mixed dispersion with small blade coater, placing gel-type film with substrate in acetone, drying and adding large-size graphene film and graphene oxide dispersion. USE - The method is useful for preparing graphene-based and organic micro-molecule of aqueous lithium ion super-capacitor. ADVANTAGE - The method: has simple preparation process, and is suitable for industrial production; and promotes the dissolution of organic substances. DETAILED DESCRIPTION - Preparing graphene-based and organic micro-molecule of aqueous lithium ion super-capacitor comprises (i) dissolving high-concentration of liquid-crystal graphene oxide (LC-GO)/sodium chloride/urea/ammonium acetate (either ammonium carbonate or ammonium sulfate) and mixing at an optimized mass ratio and adjusting the graphene oxide concentration to 6 mg/ml, then magnetic stirring and ultrasonic shaking, allowing to stand mixture for 1-2 days to obtain stable sol mixed dispersion liquid, (ii) drying the solution and filming, coating the resultant mixed dispersion with small blade coater, and placing the gel-type film with substrate in acetone for 3-5 minutes, taking out and drying to obtain film having uniform thickness to obtain large-size graphene film, adding large-size graphene film and graphene oxide dispersion into teflon mold and drying to form a film, (iii) sandwiching dried film between two pieces of glass, placing in a reaction vessel containing 100 ml aqueous ammonia solution (pH of 11-12), reducing hydrothermally in an oven at 180 degrees C for 3 hours, then cooling and removing the film and washing with deionized water repeatedly to obtain nitrogen-doped and internally porous graphene film, (iv) placing certain amount of organic matter (4,4'-dihydroxydiphenyl ether, 4,4'-diaminodiphenyl ether, pyromellitic acid, benzidine, 3,3'-dihydroxybenzidine and 3,3'-diaminobenzidine, but not limited to these organic molecules) in 1 M dilute sulfuric acid or aqueous ammonia solution at pH of 12, sealing and placing in an oven at 60-80 degrees C until to obtain saturated solution, (v) adding flexible graphene thin film obtained in (iii) into a solution containing the saturated organic matter obtained in (iv), heating to 80 degrees C for 4 hours so that the organic small molecules are fully adsorbed on the surface of graphene, and then taking out black film is taken out and adding into deionized water, washing repeatedly to neutral, and (vi) cut functionalized graphene film cut to the same size using lithium sulfate solution with a wide voltage window as the electrolyte and soaking ach porous insulating membrane in 2M lithium sulfate aqueous solution, taking out graphene film after 2 hours and assembled into a sandwich-structured symmetrical capacitor and electrochemically tested.