MEMBRANE ELECTRODE ASSEMBLY, METHOD FOR PRODUCING MEMBRANE ELECTRODE ASSEMBLY, AND FUEL BATTERY

摘要

It is an object of the invention to provide an MEA in which a high level of interfacial adhesions are achieved between its PEM and catalyst layer so that the catalyst layer does not easily peel from the PEM and to provide a manufacturing method of the MEA and a fuel cell employing the MEA and having an excellent battery performance. In the manufacturing method of the MEA 4, since an adhesion layer and a catalyst layer are formed respectively by coating an ink which contains a solvent directly on their adjacent layer, polymer electrolytes in the adjacent layer present near the interface adhere while slightly dissolving. As a result, interfacial adhesions of the PEM 1 or the catalyst layer 3 can be enhanced more than in the case of a manufacturing method in which the adhesion layer and the catalyst layer which are respectively formed on temporary substrates are transferred onto the PEM by thermal compression. In addition, the MEA 4 has a high level of interfacial adhesions between the PEM 1 and the catalyst layer 3 so that the catalyst layer 3 does not easily peel from the PEM 1. Furthermore, the fuel cell employing the MEA 4 has an excellent battery performance because the catalyst layer 3 is hardly stripped off the PEM 1.