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• W3215285013 abstract "Abstract This work presents comprehensive studies of inlet gas humidification on O 2 mass transport and proton exchange membrane fuel cell performance to obtain a better understanding of transport processes at a cathode gas diffusion electrode. The O 2 mass transport resistance was determined employing our segmented cell system and a novel method based on the distribution of the spatial limiting currents using 5% vol. O 2 mixtures with various balance gases from He to C 3 H 8 . Variation of the molecular weight of the balance gas resulted in the determination of O 2 mass transport resistance due to Knudsen diffusion as well as diffusion and dissolution through liquid and ionomer films in a cathode catalyst layer ( R K+film ) and gas phase ( R m, N2 ). The application of a gas diffusion layer with and without a microporous layer (MPL) allowed us to separate contributions from the cathode catalyst layer ( R K+film, CCL ) and MPL ( R MPL ). The data demonstrated that R K+film, CC L significantly decreased from 92.36 to 52.83 s/m at 32 and 100% relative humidity, respectively, due to the effect of humidification on gas permeability through the ionomer. At the same time, R m, N2 decreased slightly with gas humidification, while R MPL increased slightly. The results showed that fuel cell performance improved with a decrease in permeability mass transport overpotentials and R K+film, CCL . An analysis of the data demonstrated correlations between operating conditions, the mass transport parameters of the cathode gas diffusion electrodes, fuel cell performance, and voltage losses." @default.
• W3215285013 created "2021-12-06" @default.
• W3215285013 creator A5027707307 @default.
• W3215285013 creator A5075358378 @default.
• W3215285013 date "2021-11-19" @default.
• W3215285013 modified "2023-10-17" @default.
• W3215285013 title "Exploration of operating conditions on oxygen mass transport resistance and performance of PEM fuel cells: Effects of inlet gas humidification" @default.
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• W3215285013 doi "https://doi.org/10.1002/elsa.202100134" @default.
• W3215285013 hasPublicationYear "2021" @default.
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