Improved membrane electrode assembly for PEM full cell

• Main Authors: MYRON KRASIJ, RICHARD D. BREAULT
• Format: Patent
• Language: Chinese; English
• Published: 15.09.2004
• Edition: 7
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

分别在完全平面式PEM(48)的两侧上设置用于PEM燃料薄片电池催化剂层(40，44)的改进的膜片电极组件(10)。气体扩散层(38，50)分别设置在不与完全平面式PEM(48)连通的催化剂层(40，44)上。多孔衬底(32，34)分别设置在不与催化剂层(40，44)连通的气体扩散层(38，50)上。多孔衬底(32，34)在与多孔衬底(32，34)的密封剂浸渍区域(36，52)连通的区域中在其周围用密封剂(60，62)浸渍。气体扩散层(38，50)、多孔衬底(32，34)和催化剂层(40，44)与PEM(48)共同延伸。 An improved membrane electrode assembly for PEM fuel cells is provided. Catalyst layers (40, 44) are disposed, respectively, on both sides of the full planform proton exchange membrane (48). Gas diffusion layers (38, 50) are disposed, respectively, on sides of the catalyst layers (40, 44) not in communication with the full planform proton exchange membrane (48). Porous substrates (32, 34) are disposed, respectively, on sides of the gas diffusion layers (38, 50) not in communication with the catalyst layers (40, 44). The porous substrates (32, 34) are impregnated at their periphery with a sealant. The gas diffusion layers (38, 50) are coated with a sealant (60, 62) on respective sides thereof in regions which are in communication with sealant impregnated regions (36, 52) of the porous substrates (32, 34). The gas diffusion layers (38, 50), the porous substrates (32, 34), and the catalyst layers (40, 44) are co-extensive with the proton exchange membrane (48). The membrane electrode assembly (10) is continuously manufactured to eliminate step discontinuities and the associated strict tolerance requirements and resultant high scrap rates.