FUEL CELL ASSEMBLY AND METHOD FOR OPERATING A FUEL CELL ASSEMBLY

摘要

The invention relates to a fuel cell arrangement (3) comprising at least one PEM-fuel cell for generating electric energy from the reactant gases hydrogen and oxygen, comprising at least one membrane electrode assembly (2) which comprises a membrane (4) coated with platinum electrodes (5) and a porous gas diffusion layer (6) is arranged on each side of the electrode, or which comprises a membrane (4) and a porous gas diffusion layer (6) is arranged on each side and which is coated with a platinum electrode (5), also comprising bipolar plates (7) which are adjacent to the gas diffusion layers (6) and through which, when in operation, a coolant can flow. In order to prevent damage to the membrane (4), the access of at least one of the reactant gases to the membrane (4) is blocked by a mechanical barrier (10) on one part of an edge area of the membrane electrode assembly (2).