期刊
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
卷 46, 期 7, 页码 9782-9793出版社
WILEY
DOI: 10.1002/er.7851
关键词
gas diffusion layer; membrane hydration; proton exchange membrane fuel cell; substrate-free microporous layer; water management
资金
- National Key Research and Development Program of China [2019YFB1504503]
A novel substrate-free microporous layer (sfMPL) has been prepared, which extends the usable humidity range of PEMFCs and improves performance. The maximum power density of a single-cell assembled by sfMPL is 36.6% higher than that with conventional methods.
The gas diffusion layer (GDL) is a vital constituent of proton exchange membrane fuel cells (PEMFCs), which directly affects the performance and cost of PEMFCs. Also, the GDL integration can simplify the structure of PEMFC. Herein, a novel substrate-free microporous layer (sfMPL) has been successfully prepared by a dry-press method, which broadens the usable humidity range of PEMFCs and improves the performance under different humidity conditions. Precisely, the maximum power density of a single-cell assembled by sfMPL (with optimised 10 wt.% binder content and 1.0 g pore-forming agent) is 754 mW cm(-2) at 40% relative humidity, which is 36.6% higher than that with conventional GDL (552 mW cm(-2)). Furthermore, the sfMPL shows outstanding stability after high potential oxidation (1.6 V vs RHE). Our results highlight a promising new class of low-cost, substrate-free MPL for PEMFCs and provide a basis for future research on substrate-free MPL.
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