| 摘要 |
PURPOSE:To manufacture a material for gas diffusion electrode having excellent characteristics and good durability, by dispersing carbon depositing a catalyst and a fluorine-containing hydrophobic polymer to an electric insulating material having open-cell type fine pores and mixing them. CONSTITUTION:7-90pts. carbon powder depositing a catalyst such as platinum, etc. and having <=1mu particle diameter and 10-500m<2>/g specific surface area, and 0.5-90pts.wt. hydrophobic fluoropolymer such as a copolymer of tetrafluoroethylene with hexafluoropropylene (FEP), etc. are added to an electric insulating material having open cell type fine pores such as polytetrafluoroethylene (PTFE), or furthermore, a 20-300pts.wt. liquid lubricant such as petroleum, solvent naphtha, etc., is added to 100pts.wt. the total amt. of PTFE, carbon, and polymer to bring the mixture into a paste state. The paste is fabricated into a sheet shape and stretched to one direction after the liquid lubricant is removed heating. A material for gas diffusion electrode having excellent characteristics in void, and air permeability, and good durability is obtd. |
