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Observation of water droplets in microporous layers for polymer electrolyte fuel cells by X-ray computed nano-tomography
Description
<jats:p>An X-ray computed nano-tomography (nano-CT) system has been established at the BL33XU beamline of SPring-8. The optical system consists of pseudo-Köhler illumination with a sector condenser zone plate, an apodization Fresnel zone plate as the objective lens, and a Zernike phase plate. The imaging detector is a fiber-coupling type X-ray camera. The performance of the X-ray nano-CT system was confirmed by imaging an X-ray test chart. The system was subsequently applied to the observation of a microporous layer for polymer electrolyte fuel cells and a simulated microporous layer including liquid water. The nano-CT system, which can perform a computed tomography measurement in less than 4 min, allowed visualization of a spherical water droplet produced in the microporous layer. In the present study, the shape of water droplets in a nanoscale porous structure is investigated.</jats:p>
Journal
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- Journal of Synchrotron Radiation
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Journal of Synchrotron Radiation 29 1258-1264, 2022-08-17
International Union of Crystallography (IUCr)