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Observation of water droplets in microporous layers for polymer electrolyte fuel cells by X‐ray computed nano‐tomography

Journal of synchrotron radiation, 2022-09, Vol.29 (5), p.1258-1264 [Peer Reviewed Journal]

2022 Satoshi Yamaguchi et al. published by IUCr Journals. ;2022. This article is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;Satoshi Yamaguchi et al. 2022 2022 ;ISSN: 1600-5775 ;ISSN: 0909-0495 ;EISSN: 1600-5775 ;DOI: 10.1107/S1600577522007949 ;PMID: 36073885

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Title:
Observation of water droplets in microporous layers for polymer electrolyte fuel cells by X‐ray computed nano‐tomography
Author: Yamaguchi, Satoshi ; Kato, Satoru ; Yoshimune, Wataru ; Setoyama, Daigo ; Kato, Akihiko ; Nagai, Yasutaka ; Suzuki, Takahisa ; Takeuchi, Akihisa ; Uesugi, Kentaro
Subjects: Apodization ; Computed tomography ; Droplets ; Electrolytic cells ; Fresnel zones ; gas diffusion layer ; hydrophobic material ; Medical imaging ; microporous layer ; Phase plates ; polymer electrolyte fuel cell ; Polymers ; Proton exchange membrane fuel cells ; Research Papers ; Water ; water droplet ; Water drops ; X‐ray computed nano‐tomography ; Zone plates
Is Part Of: Journal of synchrotron radiation, 2022-09, Vol.29 (5), p.1258-1264
Description: 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. Condensed liquid water was observed in the pores of a model microporous layer for a polymer electrolyte fuel cell using an X‐ray computed nano‐tomography system constructed at the BL33XU beamline of SPring‐8. The water droplets had a spherical shape, regardless of the structure of the pores in the hydrophobic porous material.
Publisher: 5 Abbey Square, Chester, Cheshire CH1 2HU, England: International Union of Crystallography
Language: English
Identifier: ISSN: 1600-5775
ISSN: 0909-0495
EISSN: 1600-5775
DOI: 10.1107/S1600577522007949
PMID: 36073885
Source: DOAJ Directory of Open Access Journals
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Observation of water droplets in microporous layers for polymer electrolyte fuel cells by X‐ray computed nano‐tomography

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