期刊
JOURNAL OF POWER SOURCES
卷 335, 期 -, 页码 162-171出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2016.10.039
关键词
Pore network modeling; Synchrotron X-ray; Computed tomography; Liquid water distribution; Gas diffusion layer; Compression
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- NSERC Discovery Accelerator Program
- NSERC Collaborative Research and Training Experience (CREATE) Program in Distributed Generation for Remote Communities
- NSERC Canada Research Chairs Program
- Canadian Foundation for Innovation (CFI)
- Ontario Ministry of Research and Innovation Early Researcher Award
Understanding how compression affects the distribution of liquid water and gaseous oxygen in the polymer electrolyte membrane fuel cell gas diffusion layer (GDL) is vital for informing the design of improved porous materials for effective water management strategies. Pore networks extracted from synchrotron-based micro-computed tomography images of compressed GDLs were employed to simulate liquid water transport in GDL materials over a range of compression pressures. The oxygen transport resistance was predicted for each sample under dry and partially saturated conditions. A favorable GDL compression value for a preferred liquid water distribution and oxygen diffusion was found for Toray TGP-H-090 (10%), yet an optimum compression value was not recognized for SGL Sigracet 25BC. SGL Sigracet 25BC exhibited lower transport resistance values compared to Toray TGP-H-090, and this is attributed to the additional diffusion pathways provided by the microporous layer (MPL), an effect that is particularly significant under partially saturated conditions. (C) 2016 Elsevier B.V. All rights reserved.
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