초록 ▼

An improved membrane electrode assembly for PEM fuel cells is provided. Catalyst layers (40, 44) are disposed, respectively, on both sides of the proton exchange membrane (48). Gas diffusion layers (38, 50) are disposed, respectively, on sides of the catalyst layers (40, 44) not in contact with the

An improved membrane electrode assembly for PEM fuel cells is provided. Catalyst layers (40, 44) are disposed, respectively, on both sides of the proton exchange membrane (48). Gas diffusion layers (38, 50) are disposed, respectively, on sides of the catalyst layers (40, 44) not in contact with the proton exchange membrane (48). Porous substrates (32, 34) are disposed, respectively, on sides of the gas diffusion layers (38, 50) not in contact with the catalyst layers (40, 44). The porous substrates (32, 34) are impregnated at their periphery with a thermoplastic material. Thermoplastic film layers (42, 46, 68) are employed at the periphery of the assembly (10) between component parts to bond and seal water transport plates (12' and 16) to each other, as well as substrates (32, 32', 34) to the membrane electrode assembly (20). A foam tape 60, 62, 62' are employed to seal water transport plates (12, 12', 16) to respective substrates (32, 32', 34).

대표청구항 ▼

[ What is claimed is:] [1.] A PEM fuel cell assembly, comprising:a proton exchange membrane having a first side and a second side;a cathode catalyst layer disposed on said first side of said proton exchange membrane;an anode catalyst layer disposed on said second side of said proton exchange membran

[ What is claimed is:] [1.] A PEM fuel cell assembly, comprising:a proton exchange membrane having a first side and a second side;a cathode catalyst layer disposed on said first side of said proton exchange membrane;an anode catalyst layer disposed on said second side of said proton exchange membrane;an anode porous substrate disposed on a side of said anode catalyst layers not in contact with said proton exchange membrane;an anode water transport plate disposed on a side of said anode porous substrate not in contact with said anode catalyst layer; said anode water transport plate having a central area and a peripheral area;a cathode water transport plate disposed on a side of said anode water transport plate not in contact with said anode substrate; said cathode water transport plate having a central area and a peripheral area;a bonding and sealing layer of thermoplastic material disposed between said anode water transport plate and said cathode water transport plate at respective peripheral areas thereof; said layer of thermoplastic material bonding and sealing said anode water transport plate and said cathode water transport plate relative to one another;a cathode substrate disposed on a side of said cathode water transport plate not in contact with said anode water transport plate; anda cathode catalyst layer disposed on a side of said cathode substrate not in contact with said cathode water transport plate.