▎ 摘　　要

NOVELTY - Carbon-based flexible conductive film comprises thermoplastic polyurethane and carbon materials in a mass ratio of (1:250)-(1:50), where the carbon material comprises first component comprising graphene and/or reduced graphene oxide and second component comprising graphite, conductive carbon black and/or carbon nanotubes, and if the intensity ratio (ID/IG) value of the first component is (A) and the ID/IG value of the second component is (B), then the absolute value of the difference between (A)and (B) is less than or equal to 0.4. USE - The conductive film is used for preparing electrochemical device (claimed). ADVANTAGE - The conductive film uses small amount of carbon material, is relatively simple, and meets the requirements of antistatic performance and electrical conductivity of GBT 156621995 with a volume resistivity of less than 104 Omega x m. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the carbon-based flexible conductive film, involving (i) dissolving the thermoplastic polyurethane masterbatch in a solvent, heating and stirring at 70-90 degrees C to obtain first co-solution, (ii) dispersing the carbon material in a solvent, and ultrasonically dispersing it under temperature control to obtain second co-solution, (iii) mixing the second co-solution and first co-solution, and performing temperature-controlled ultrasonic dispersion to obtain the third co-solution, (iv) adding the short-chain alcohol to the third co-solution to make the thermoplastic polyurethane and carbon material in the third co-solution cross-link and settle, and self-assembling to form carbon-based flexible conductive embryo and (v) taking out the carbon-based flexible conductive embryo and placing it in a constant temperature oven and drying to obtain a carbon-based flexible conductive film, where the mass ratio of the carbon material and thermoplastic polyurethane masterbatch is 1:250-1:50.