Membrane-electrode assembly, method for preparing the same, and fuel cell system comprising the same

The present invention is a membrane-electrode assembly, a method of manufacturing the same, and relates to a fuel cell system including the same, more specifically to a polymer electrolyte membrane; The coated catalyst layer directly sprayed onto the polymer electrolyte membrane on both sides; And a film comprising the gas diffusion layer is disposed on both sides of the catalyst layer - to a fuel cell system including the electrode assembly, a method of manufacturing the same, and this. Film of the present invention as a catalyst layer was formed directly on the electrode assembly is frozen the polymer electrolyte membrane on both sides, the thin uniform catalyst layer, has the advantage of better use of the catalyst reduces the amount of the catalyst. In addition, the membrane-electrode assembly is because the manufacture in a state where the polymer electrolyte membrane swelling is large, it is possible to maintain a higher content of water in low humidity or non-humidified operation, because it contains water or sulfuric acid to the polymer electrolyte membrane itself, low humidity or non- there is an advantage that can be applied to the fuel cell humidification system. A fuel cell, a membrane-electrode assembly, frozen, catalysts, spray