摘要:
A phosphoric acid fuel cell is efficiently produced. As a matrix, a material is used which can hold therein a impregnating liquid electrolyte and which can release the impregnating liquid electrolyte when the material is pressed. In step S1, the matrix is impregnated with the liquid electrolyte such as phosphoric acid, sulfuric acid, and methanesulfonic acid to provide an electrolyte layer. In step S2, the electrolyte layer is interposed between an anode electrode and a cathode electrode to provide a stack. In step S3, the stack is pressed. By pressing the stack, the electrolyte layer is joined to the anode electrode and the cathode electrode and the liquid electrolyte is diffused from the matrix to electrode catalyst layers of both of the electrodes.
摘要:
A fuel cell provides a high output at a high current density. The fuel cell has an anode electrode and a cathode electrode comprising a gas diffusion layer, a water-repellent layer disposed on the gas diffusion layer and containing a carbon material and polytetrafluoroethylene, and an electrode catalyst layer disposed on the water-repellent layer and containing a carbon material carrying a catalyst. The electrode catalyst layer has maximum and minimum thicknesses that differ from each other by less than 30 nullm. The electrode catalyst layer has cracks whose area is less than 10% of a total area of the electrode catalyst layer.