Method for preparing the membrane-electrode assembly for fuel cell using membrane on electrode method before the dry-out of nafion ionomer solution and membrane-electrode assembly for fuel cell prepared by the method

摘要

According to the present invention, after impregnating the perfluorinated sulfonic acid Nafion solution into the pores and the surface of the porous carbon fluoride or hydrocarbon polymer film support, respectively, the Nafion solution is completely dried while undergoing a drying process at room temperature. That is, by attaching the anode and the cathode electrodes on both sides in a solution state of high viscosity, and then dried at room temperature and then subjected to a heat treatment process, a method for manufacturing MEA for fuel cells using the MOE method before complete drying of the Nafion ionomer solution and thereby It relates to a manufactured fuel cell MEA. According to the present invention as described above, the performance is increased by reducing the interface resistance between the electrode and the electrolyte membrane, the film thickness can be easily adjusted, and the three-phase interfacial expansion is advantageous in harsh operating conditions such as normal temperature humidification operation or air operation. To achieve.;Nafion ionomer, porous support, composite membrane, upper electrode membrane, membrane electrode assembly