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PEM Fuel Cell performance at sub-zero temperatures
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Orientador(es)
Resumo(s)
In this work a study of the performance of a low power fuel cell at sub-freezing temperatures has been undertaken. Knowledge in this area is still scarce. After global characterization of the stack on a wide range of temperatures and relative humidity’s the behaviour at negative temperatures (-5ºC -10ºC, -15ºC) has been established. Furthermore, performance was evaluated after the cell was submitted to cycles from -25ºC to + 25ºC. At the end of 10 cycles only marginal loss in performance was registered, when testing at + 2.5ºC and + 25ºC. On the basis of the obtained results a strategy for start-up and shut-down has been designed in order to be implemented for operation at low temperatures. A failure analysis of the membrane and catalyst layers and GDLs is under way in order to evaluate material degradation
Descrição
Palavras-chave
PEM Sub-zero temperatures Degradation Electrodeposition Thin films Fuel cells
Contexto Educativo
Citação
Rangel, C. M.; Paiva, T. I.; Fernandes, V. R. PEM Fuel Cell performance at sub-zero temperatures. In: 3º Seminário Internacional de Torres Vedras, Hydogen Enegy and Sustainability-Advances in Fuell Celll and Hyfrogen Workshop, Torres Vedras, April 29-30, 2010, p. 45-47