Electrode having continuous pores and a fluid fuel cell

The invention relates to a fuel cell, comprising two electrodes of differing polarity and an electrolyte which is arranged between said electrodes. The invention also relates to an electrode, especially for fuel cells with this construction. Said electrode has pores (3) through which a fluid, especially a gas can pass from a surface on the gas side (1) to a surface on the electrolyte side (2), with a pore inlet opening (4) and a pore outlet opening (5). Since the electrode has pore inlet openings (4) with a greater total surface than the total surface of the pore outlet openings (5), especially as a result of the configuration of the pores (3) in a funnel shape or with stages, or as a result of the at least two-layered structure of the electrode (6, 7), a fluid, especially a gas can advantageously pass through the electrode more easily. The loss of humidity of the layer which is in contact with the electrolyte and the surface on the electrolyte side (2) of the electrode is also reduced. The inventive fuel cells with the inventive electrodes of differing polarity can be combined with an electromotor to provide an alternative to conventional internal combustion engines, especially in vehicles and rail systems.