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- W2154695989 endingPage "F164" @default.
- W2154695989 startingPage "F153" @default.
- W2154695989 abstract "Accelerated stress tests are commonly applied in order to obtain a prediction of fuel cell life time within a short testing period. The stress test in this work considers a fuel cell which is constantly under load with frequent periods of very high current. Four different cells were operated each with a specific load profile. As a result severe performance degradation was observed in the region of high current densities. A short overview over the phenomena which may contribute to this specific fuel cell degradation is compiled from literature. Based on this overview major degradation modes are identified and combined with a simple polarization curve model. The modeling results allow for two different interpretations. Carbon corrosion reactions can explain the observed effects if cell voltage is assumed as the driving force for degradation. A better fit was obtained by using the overall heat flux as degradation criterion. In this case an increase in local temperature could lead to redistribution and loss of phosphoric acid from the MEA. The results are supported by the fact that the model yields consistent time dependend results for four different and non-periodic load cycles." @default.
- W2154695989 created "2016-06-24" @default.
- W2154695989 creator A5021504578 @default.
- W2154695989 creator A5073453004 @default.
- W2154695989 creator A5091841971 @default.
- W2154695989 date "2014-12-01" @default.
- W2154695989 modified "2023-10-16" @default.
- W2154695989 title "Accelerated Degradation of High-Temperature Polymer Electrolyte Fuel Cells: Discussion and Empirical Modeling" @default.
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