In this work, we investigated the dominating properties of the porous materials that impact water dynamics in a polymer electrolyte membrane fuel cell (PEMFC). Visualizations of liquid water in an operating PEMFC were performed at the Canadian Light Source. A miniature fuel cell was specifically designed for X-ray imaging investigations, and an in-house image processing algorithm based on the Beer-Lambert law was developed to extract quantities of liquid water thicknesses (cm) from raw X-ray radiographs. The X-ray attenuation coefficient of water at 24 keV was measured with a calibration device to ensure accurate measurements of the liquid water thicknesses. From this experiment, the through plane distribution of the liquid water in the fuel cell was obtained.
In situ liquid water visualization in polymer electrolyte membrane fuel cells with high resolution synchrotron x-ray radiography
S. Chevalier, R. Banerjee, J. Lee, N. Ge, C. Lee, T. W. Wysokinski, G. Belev, A. Webb, D. Miller, N. Zhu, Y. Tabuchi, T. Kotaka, A. Bazylak; In situ liquid water visualization in polymer electrolyte membrane fuel cells with high resolution synchrotron x-ray radiography. AIP Conf. Proc. 27 July 2016; 1741 (1): 050006. https://doi.org/10.1063/1.4952926
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