ELECTRODE WITH GAS-DIFFUSING RIB FOR FUEL CELL

摘要

PURPOSE:To increase the mechanical strength of an electrode without deteriorating the utilization rate of reaction gas by sufficiently securing the diffusion and supply of reaction gas as well as the diffusion and removal of products in the electrode by placing a catalyst layer in the base material for the electrode and rib structure. CONSTITUTION:A porous base material 4 for a rib electrode 3 is subjected to water repellent treatment by being immersed in a tetrafluoroethylene dispersion liquid or the like. After the base material 4 is placed with the rib directed downward, a dispersion liquid of a carbon powder containing a noble metal such as platinum is poured over the base material 4 to fill its holes with the dispersion liquid up to a given thickness. After that, the thus obtained body is dried and sintered, thereby making an electrode 3 having a catalyst layer 5 installed inside the base material 4. By the means mentioned above, it is possible to provide an electrode with a gas-diffusing rib having an increased dimensional accuracy and can be used for a high-performance fuel cell.