▎ 摘　　要

NOVELTY - Process for manufacturing fuel cells containing a gas diffusion layer, based on the nanostructured graphene films produced by laser pyrolysis, involves applying the laser pyrolysis to the polyimide film, cleaning the components with ethyl alcohol after each pyrolysis session, calibrating the laser tube, making a platinum catalyst ink, subjecting the resulting mixture to ultrasonic treatment for 6 hours, uniformly spraying the ink onto the surface of two graphene foam films and after drying for 1 hour at a temperature of 60 degrees C, obtaining two graphene substrates coated with the platinum catalyst layer, treating an H-shaped membrane with a solution of oxygenated water and with a solution of sulfuric acid, pressing the two substrates on either side of the polymeric membrane with a heated hydraulic press, and mechanically attaching two foils of carbon paper on either side of the membrane-electrode-microporous layer assembly. USE - The process is useful for manufacturing fuel cells containing a gas diffusion layer. ADVANTAGE - The process is suitable for small and large industrial scale production. DETAILED DESCRIPTION - Process for manufacturing fuel cells containing a gas diffusion layer, based on the nanostructured graphene films produced by laser pyrolysis, involves using as raw material a commercial-grade polyimide film with a thickness of 127 mu m, laminated on copper foil Pyralux LF 9150R (RTM: Acrylic-based copper clad laminates) Du Pont, applying the laser pyrolysis to the polyimide film while gauging the surface by setting the parameters of the laser cutting-engraving system SLG-3020 with a scanning accuracy of 25.4 mu m and a positioning accuracy of 10 mu m, at an image resolution of 1000 ppi and a surface of the square gauge of 6.25 cm2, cleaning the components with ethyl alcohol after each pyrolysis session, calibrating the laser tube, where the graphene films subjected to pyrolysis remain attached to the non-pyrolyzed polyimide substrate, making a platinum catalyst ink of 100 mg of commercial-grade platinum catalyst HiSPEC 9100 (RTM: Platinum 60% on high surface area advanced carbon support) with 300 mg of Nafion (RTM: Perfluorinated resin solution) 5% and 25 ml of isopropanol, subjecting the resulting mixture to ultrasounds for 6 hours, uniformly spraying the ink onto the surface of two graphene foam films and after drying for 1 hour at a temperature of 60 degrees C, obtaining two graphene substrates coated with the platinum catalyst layer, treating an H-shaped membrane of Nafion 1110 (RTM: Non-reinforced cation exchange membrane films based on chemically stabilized perfluorosulfonic acid/PTFE copolymer in the acid form) Chemours/DuPont with a 10% solution of oxygenated water, for 1 hour, at 75 degrees C and with a solution 1 M of sulfuric acid, for 2 hours, at 75 degrees C, pressing the two substrates on either side of the polymeric membrane with a heated hydraulic press, for 15 minutes, at a temperature of 120 degrees C and a pressure of 0.8 kNcm-2, detaching the non-pyrolyzed substrate to leave the catalyst layer and the graphene film attached on either side of the Nafion (RTM: Perfluorinated resin solution) membrane and mechanically attaching two foils of carbon paper on either side of the membrane-electrode-microporous layer assembly.