| 摘要 |
In the present invention, a power generator used for a fuel cell comprises: a membrane electrode assembly provided with an electrolyte membrane, a first catalyst layer disposed on one surface of the electrolyte membrane, a second catalyst layer disposed on another surface of the electrolyte membrane, a first gas diffusion layer disposed on the outside of the first catalyst layer, and a second gas diffusion layer disposed on the outside of the second catalyst layer; a frame disposed on a peripheral margin of the membrane electrode assembly; and an adhesive for adhering the membrane electrode assembly and the frame together. The first gas diffusion layer is formed so as to have the same size as the electrolyte membrane, and the second gas diffusion layer is formed so as to be smaller than the electrolyte membrane. The frame has a step section corresponding to a level difference formed by the electrolyte membrane and the second gas diffusion layer. The step section is provided with an adhesion surface constituted of a surface facing the first gas diffusion layer and a surface facing the electrolyte membrane or the second catalyst layer. The adhesion surface is more hydrophilic than a non-adhesion surface that is not adhered to another member among the surfaces constituting the frame. |
