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Open Access Publications from the University of California

Tomographic Imaging of Water Injection and Withdrawal in PEMFC Gas Diffusion Layers


X-ray computed tomography was used to visualize the water configurations inside gas diffusion layers for various applied capillary pressures, corresponding to both water invasion and withdrawal. A specialized sample holder was developed to allow capillary pressure control on the small-scale samples required. Tests were performed on GDL specimens with and without hydrophobic treatments.

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