Separator plate unit for a fuel cell and fuel cell comprising the same with enhanced performance

摘要

The present invention relates to a separator plate unit for a fuel cell, which comprises a flow field with fluid guide channels for the reaction fluids, which run parallel to each other and are bounded by ribs, wherein flow obstacles narrowing the flow cross section of the fluid guide channels are arranged within the fluid guide channels, with 2-8, preferably 3-6 flow obstacles per 100 mm channel length are provided, the arrangement of the flow obstacles being asymmetric with respect to flow guide channels being adjacent to each other, and wherein the flow obstacles have a cross section area of each at maximum 90 % of the cross section of the fluid guide channels. Further, the present invention also relates to a fuel cell comprising such a separator plate unit on the cathode side and/or anode side. The fuel cell of the invention shows enhanced performance.