| 摘要 |
A fuel cell (40) includes first and second catalysts (12'), (14') secured to opposed surfaces of an electrolyte (16'); a first flow field (26') secured in fluid communication with the first catalyst (12') defining a plurality of flow channels (30A', 30B', 30C', 30D') between a plurality of ribs (32A', 32B', 32C', 32D', 32E') of the first flow field (26'); and a backing layer (42) secured between the first flow field (26') and the first catalyst (12'). The backing layer (42) includes a carbon black, a hydrophobic polymer, and randomly-dispersed carbon fibers (44). The carbon fibers (44) are at least twice as long as a width (46) of the flow channels (30A', 30B', 30C', 30D') defined in the adjacent first flow field (26'). The backing layer (42) replaces a known substrate (22) and diffusion layer (18). |
