Carbon Cloth Gas Diffusion Backings for High Performance PEFC Cathodes
Open Access
- 1 January 1998
- journal article
- Published by The Electrochemical Society in ECS Proceedings Volumes
- Vol. 1998-27 (1) , 1-9
- https://doi.org/10.1149/199827.0001pv
Abstract
We report results comparing the performance of polymer electrolyte fuel cells (PEFCs) using a series of variously structured carbon cloth gas diffusion backings on the cathode side of the PEFC. Backing performance is considered in light of measurements of gas permeation rate through the (dry) backing samples. Comparisons are made of backing effects in both 5 and 50 cm2 cells, operated with a series of oxygen partial pressures in the cathode feedstream. in tests with 50 cm2 cells, backings which exhibited 3–5 fold higher gas permeation rates (in dry state) than the standard ELAT, enabled an increase of maximum PEFC power density by about 20%.Keywords
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