GASDIFFUSIONSELEKTRODE MIT VERRINGERTEM DIFFUSIONSVERMÖGEN FÜR WASSER UND POLYMERELEKTROLYTMEMBRAN-BRENNSTOFFZELLE

摘要

Gas diffusion electrodes (1) for polymer electrolyte membrane fuel cells are modified such that the diffusion of water therein is inhibited in comparison with un-modified electrodes. Polymer electrolyte membrane fuel cells with the modified gas diffusion electrodes can be operated, with on the average unchanged operating conditions, without addition of water, since the gas diffusion electrodes do not allow more water to escape than that formed during the reaction of burnable gas and oxidizing agent, and guarantee sufficient membrane moisture.