| 摘要 |
PURPOSE:To obtain an electrode with high catalyst activity and excellent gas diffusion by alternately laminating a hydrophilic film consisting of catalytic particles and PTFE and a water repellent film consisting of carbon powder and PTFE, making them thin, and forming these thin films on an electrode substrate as a catalytic layer. CONSTITUTION:A hydrophilic thin film is obtained by carrying platinum on carbon powder, mixing it with PTFE, and molding it. Then, a water repellent thin film is obtained by mixing the carbon powder 7 with the PTFE5 and molding it. A laminating film of 0.3mm. thick, for example, with a total of 128 layers in which the hydrophilic and water repellent thin films are laminated alternately by overlapping the films with a press or a roller. Subsequently, such an obtained laminating layer is brocken into pieces and fine particles of 5-10mum in the outside diameter are obtained. The size of these fine particles corresponds to the thickness in which the respective one or two-layered hydrophilic and water repellent layers are laminated. A catalytic layer is formed on an electrode substrate using the particles with this laminating structure. |
