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http://dx.doi.org/10.14478/ace.2022.1107

Effect of Porous Flow Field on PEMFC Performance with Dead Ended Anode System  

Kim, Junseob (School of Chemical Engineering, University of Ulsan)
Kim, Junbom (School of Chemical Engineering, University of Ulsan)
Publication Information
Applied Chemistry for Engineering / v.33, no.6, 2022 , pp. 646-652 More about this Journal
Abstract
The dead-end anode (DEA) system is a method that closes the anode outlet and supplies fuel by pressure. The DEA method could improve fuel usage and power efficiency through system simplification. However, flooding occurs due to water and nitrogen back diffusion from the cathode to the anode during the DEA operation. Flooding is a cause of decreased fuel cell performance and electrode degradation. Therefore, tthe structure and components of polymer electrolyte membrane fuel cell (PEMFC) should be optimized to prevent anode flooding during DEA operation. In this study, the effect of a porous flow field with metal foam on fuel cell performance and fuel efficiency improvement was investigated in the DEA system. As a result, fuel cell performance and purge interval were improved by effective water management with a porous flow field at the cathode, and it was confirmed that cathode flow field structure affects water back-diffusion. On the other hand, the effect of the porous flow field at the anode on fuel cell performance was insignificant. Purge interval was affected by metal foam properties and shown stable performance with large cell size metal foam in the DEA system.
Keywords
PEMFC; DEA system; Metal foam; Porous flow field; Fuel efficiency;
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