Gas distribution field plate with improved gas distribution for a fuel cell and a fuel cell containing such

摘要

The present invention relates to a gas distributor field plate for a fuel cell, parallel extending gas guide channels, which are delimited by webs, being disposed in the gas distributor field plate for the reaction gases in a meander-shaped structure, characterized in that on the meander-shaped defining channels, which are present on webs with an opposite flow direction of the reaction gases, meander-shaped defining web having an increased width compared to the remaining webs are provided, wherein the widened meander-shaped defining webs are modified in the deflection regions of the meander-shaped defining channels such that a reactant depletion in the deflection regions of the meander-shaped defining channels and a transversal transport of media along the meander-shaped defining channels are prevented. The invention further relates to a fuel cell having such a gas distributor field plate on the cathode side and/or on the anode side, particularly a polymer electrolyte membrane (PEM) fuel cell.