2014
DOI: 10.1149/2.1021410jes
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Separation Method for Oxygen Mass Transport Coefficient in Gas and Ionomer Phases in PEMFC GDE

Abstract: A novel method to determine the oxygen mass transport coefficient and its separation into gas and ionomer contributions was developed and validated. The method is based on the use of a limiting current density distribution mathematical model and different diluent gases with varying molecular weights. A linear relationship between the inverse overall mass transport coefficient and the diluent molecular weight was revealed. Because the use of different gas diluents with different molecular weights only affects t… Show more

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Cited by 35 publications
(57 citation statements)
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“…Several recent studies [74][75][76][77][78] have focused on measuring the individual transport resistance contributions of the fuel cell layers by performing limiting current measurements with varied pressures, GDL thicknesses, cathode balance gases (also known as oxygen "diluents"), and RH levels. Baker et al [77] determined the relative contributions of the channels, GDL substrate, MPL, and catalyst layer to total transport resistance by manipulating GDL and MPL thicknesses and the operating pressure.…”
Section: Quantifying Oxygen Transport Resistancementioning
confidence: 99%
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“…Several recent studies [74][75][76][77][78] have focused on measuring the individual transport resistance contributions of the fuel cell layers by performing limiting current measurements with varied pressures, GDL thicknesses, cathode balance gases (also known as oxygen "diluents"), and RH levels. Baker et al [77] determined the relative contributions of the channels, GDL substrate, MPL, and catalyst layer to total transport resistance by manipulating GDL and MPL thicknesses and the operating pressure.…”
Section: Quantifying Oxygen Transport Resistancementioning
confidence: 99%
“…In the study by Nonoyama et al [75], the ionomer layer contribution to transport resistance was isolated by varying the cell temperature, since the impact of temperature on ionomer diffusion coefficient is much larger than the impact of temperature on molecular and Knudsen diffusion. Reshetenko et al [76] also used a limiting current-based methodology to identify the catalyst layer ionomer diffusion contribution.…”
Section: Quantifying Oxygen Transport Resistancementioning
confidence: 99%
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