Journal
JOURNAL OF POWER SOURCES
Volume 195, Issue 16, Pages 5292-5304Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2010.03.011
Keywords
Modeling; Diffusion media; Microporous layer; Water transport; Polymer electrolyte fuel cell; Gas-diffusion layer
Funding
- Office of Hydrogen, Fuel Cell, and Infrastructure Technologies, of the U.S. Department of Energy [DE-AC02-05CH11231]
Ask authors/readers for more resources
cell diffusion media is developed. A previous model is updated to include for the first time the use of experimentally measured capillary pressure-saturation relationships through the introduction of a Gaussian contact-angle distribution into the property equations. The updated model is used to simulate various limiting-case scenarios of water and gas transport in fuel-cell diffusion media. Analysis of these results demonstrate that interfacial conditions are more important than bulk transport in these layers, where the associated mass-transfer resistance is the result of higher capillary pressures at the boundaries and the steepness of the capillary pressure-saturation relationship. The model is also used to examine the impact of a microporous layer, showing that it dominates the response of the overall diffusion medium. In addition, its primary mass-transfer-related effect is suggested to be limiting the water-injection sites into the more porous gas-diffusion layer. (C) 2010 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available