| 摘要 |
PURPOSE:To enhance the utilization rate of an electrode catalyst without crushing pores even though hot press is carried out by mixing the electrode catalyst with a pore-forming material to fabricate an electrode, and bonding the electrode containing the pore-forming material to a polyelectrolyte film, and removing the pore-forming material to form pores in the electrode. CONSTITUTION:An electrode catalyst 4 comprising platinum supported to carbon black is mixed with polytetrafluoroethylene particles 5. Zinc powders are mixed as pore-forming material in the mixture and kerosine is mixed therein as a dispersion medium and then the mixture is formed into a sheet using a roller and dried to fabricate an electrode catalyst layer sheet 3. Next, the sheet 3 is immersed in and impregnated with an ion exchange material. The sheet 3 is hot pressed to both sides of an ion exchange film 2 to obtain a stack. The zinc powders are then removed by immersion in a strong acid aqueous solution, whereby a solid polyelectrolyte fuel cell with a large amount of pores 6 secured in its electrodes can be obtained. |
