期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 168, 期 7, 页码 -出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1945-7111/ac154e
关键词
Gas Diffusion Layer; Microporous Layer; Proton Exchange Membrane Fuel Cells; Liquid Transport; Lattice Boltzmann Method
资金
- University Research Program of Ford Motor Company
- Chiang Mai University
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
The study utilized the lattice Boltzmann method to investigate liquid distribution in GDL samples with the addition of an MPL, revealing that liquid tends to travel through cracks in the MPL surface into the GDL geometry under pressure, resulting in a more even saturation distribution across the sample.
Proton exchange membrane fuel cells (PEMFCs) require a gas diffusion layer to aid in fuel transport to the catalyst sites. A microporous layer (MPL) is often added to the GDL to improve liquid saturation inside gas diffusion media. In this work, the lattice Boltzmann method was applied to four GDL samples with the addition of an MPL. Three injection orientations were used to study liquid evolution through the samples. Each orientation used four different injection pressures, ranging from 5,000 Pa to 8,000 Pa. Saturation data for GDL samples with and without an MPL were compared. Results showed that when adding an MPL, liquid tends to distribute laterally under the MPL until pressure is reached to allow liquid to travel through the cracks of the MPL surface and into the GDL geometry. A more uniform saturation distribution across the sample is seen when comparing both types of GDLs. The outcomes of this work will help research that requires knowledge of the internal liquid transport through gas diffusion media for PEMFC application.
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