839 results about "Perfluorosulfonic acid" patented technology

The invention provides a membrane electrode containing a hydrophilic high polymer in an anode catalytic layer and a preparation method thereof. The method comprises the steps of: preprocessing a proton exchange membrane, mixing a carbon supported platinum catalyst, a perfluorinated sulfonic acid polymer solution, an organic high polymer with hydrophilicity or hygroscopicity in water or a low-boilting-point solvent, ultrasonically processing to prepare catalyst slurry, and spraying the catalyst slurry onto one side of the proton exchange membraneby adopting an illumination coating technology to prepare an anode catalytic layer; and spraying slurry, which does not containing the organic high polymer, onto the other side of the proton exchange membrane to obtain a cathode catalytic layer, and laminating the proton exchange membrane coated with catalysts at two sides with a gas diffusion layer to prepare a self-humidifying electrode with the anode containing the hydrophilic high polymer. According to the invention, the self humidification of the membrane electrode can be realized by means of simple and practical preparation method at low cost, and a fuel cell assembled with the self-humidifying membrane can be used for simplifying a system, reducing the cost and increasing the power density of the system.