Distribution structure for providing at least one reaction gas
By designing a two-piece gas distributor structure, a flat distribution surface and a vertical delivery channel are used to achieve uniform gas supply to the active surface of the fuel cell or electrolysis device, solving the problem of liquid water accumulation and improving equipment performance and efficiency.
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[0032] figure 1 A known distributor structure 10 *, for example for a fuel cell 100 or an electrolysis device, is shown in the form of a bipolar plate consisting of two pressed plates. A channel structure for a cooling liquid, for example water H2O, is formed between the plates. Above the sheet metal, a first reaction gas, for example oxygen-containing reaction gas O2 , or a second reaction gas, for example fuel-containing reaction gas H2 , is conducted onto the correspondingly applied gas diffusion layer GDL. However, in the fuel cell 100, on the cathode side of the distributor structure 10*, liquid product water H2O collects at the interface between the web of the bipolar plate and the gas diffusion layer GDL, the liquid product water Block pores in the gas diffusion layer GDL. As a result, the transport of oxygen to the catalyst layer is locally strongly hindered, so that the power of the fuel cell 100 is locally reduced, resulting in a deterioration of the overall perfor...
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