The oxygen transfer characteristics of the gas diffusion layer are closely related to the cell performance of a polymer electrolyte fuel cell. In this study, a new hybrid gas diffusion layer is proposed in which two porous media with different wettabilities are arranged alternately for augmentation of the oxygen diffusivity in the gas diffusion layer. Since the movement of water from hydrophobic to hydrophilic media due to the difference in capillary pressure, the oxygen diffusion paths in the porous media can be maintained. The oxygen diffusion characteristics with respect to water saturation were measured using an experimental apparatus that uses a galvanic battery oxygen sensor as an oxygen absorber. The experimental results demonstrate that the hybrid structure has superior oxygen diffusion characteristics than a conventional gas diffusion layer with a single porous material with moisture. That is, the effective oxygen diffusivity of the hybrid configuration was almost five times larger than that of the single type at water saturation S = 0.2.
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2010 14th International Heat Transfer Conference
August 8–13, 2010
Washington, DC, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4940-8
PROCEEDINGS PAPER
Microporous Layer Consisting of Alternating Porous Material With Different Wettability for Controlling Moisture in Gas Diffusion Layer of PEFC
Yoshio Utaka,
Yoshio Utaka
Yokohama National University, Yokohama, Japan
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Ikunori Hirose
Ikunori Hirose
Olympus Corporation, Tokyo, Japan
Search for other works by this author on:
Yoshio Utaka
Yokohama National University, Yokohama, Japan
Ikunori Hirose
Olympus Corporation, Tokyo, Japan
Paper No:
IHTC14-22197, pp. 21-28; 8 pages
Published Online:
March 1, 2011
Citation
Utaka, Y, & Hirose, I. "Microporous Layer Consisting of Alternating Porous Material With Different Wettability for Controlling Moisture in Gas Diffusion Layer of PEFC." Proceedings of the 2010 14th International Heat Transfer Conference. 2010 14th International Heat Transfer Conference, Volume 5. Washington, DC, USA. August 8–13, 2010. pp. 21-28. ASME. https://doi.org/10.1115/IHTC14-22197
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