| 摘要 |
The present invention describes a membrane fuel cell capable of operating in a stable fashion at high currently density under dry reactant gas feed at near - atmospheric pressure. This result is obtained by employing internal porous g as distributors, such as three-dimensional reticulated materials, sintered materials, juxtaposed meshes or expanded sheets, and at the same time by countercurrent-feeding the gas reactants, preferably ambient air, from the bottom. In one preferred alternative liquid water is injected from the botto m into the air feed: with these operating conditions, an extremely simplified stable functioning is obtained, since the air and water flow-rates, adjusted as requested for the maximum nominal electrical output, are kept unvaried ev en at low or zero output conditions without the cell membrane undergoing dehydration. |
