▎ 摘　　要

NOVELTY - 4,4'-Diaminodiphenyl ether (0.02 mol) and benzophenonetetracarboxylic dianhydride (0.02 mol) are added into N,N-dimethylacetamide (100 ml), and stirred under inert gas atmosphere to obtain polyamic acid solution. Graphene (0.05-0.2 g) is added into polyamic acid solution, polymerized under inert gas atmosphere to obtain solution (A). The solution (A) is poured into a clean glass plate and heated to obtain composite film. The composite film is placed in a vacuum furnace, heated, carbonized under nitrogen or argon atmosphere and cooled to obtain carbonized film. USE - Preparation of carbonized film used for preparing electrode material. ADVANTAGE - The carbonized film is prepared at low temperature in a short time, with reduced energy consumption. The electrode material formed using carbonized film has excellent mechanical properties and high specific capacitance. DETAILED DESCRIPTION - 4,4'-Diaminodiphenyl ether (0.02 mol) and benzophenonetetracarboxylic dianhydride (0.02 mol) are added into N,N-dimethylacetamide (100 ml), stirred mechanically at 300-1000 rpm for 4.5-6.5 hours under inert gas atmosphere to obtain polyamic acid solution. Graphene (0.05-0.2 g) is added into polyamic acid solution, and polymerized at 0-5 degrees C for 1-2 hours at 300-1000 rpm under inert gas atmosphere to obtain solution (A). The solution (A) is poured into a clean glass plate, heated to 60 degrees C for 2 hours, 100 degrees C for 1 hour, 200 degrees C for 1 hour and 300 degrees C for 1 hour to obtain composite film. The composite film is placed in a vacuum furnace at constant temperature, heated to 800-1600 degrees C at 2-6 degrees C/minute, carbonized under nitrogen or argon atmosphere for 2 hours and cooled naturally to room temperature to obtain carbonized film.