We use high-resolution three-dimensional X-ray imaging to identify the arrangement of fibers, water, and air in the gas diffusion layers containing different percentages of polytetrafluoroethylene (PTFE) coating: 5, 20, 40, and 60%. We quantify the contact angle and meniscus curvature once the water has spanned the layer, flow has ceased, and water has reached a position of equilibrium. We also combined with a pore network model to investigate the breakthrough capillary pressure and water saturation in gas diffusion layers. We also train deep learning models on base-case data prepared by the 3D Weka segmentation method and test them on the unfiltered unseen datasets.
Mohammad Javad Shojaei (Imperial College London)
April 23, 2023
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