Journal
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
Volume 45, Issue 11, Pages 16874-16883Publisher
WILEY
DOI: 10.1002/er.6844
Keywords
gas diffusion layer; hydrophilicity; low humidification; microporous layer; polyacrylonitrile; proton exchange membrane fuel cells
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Funding
- Ministry of Science and Technology of the People's Republic of China [2019YFB1504503]
- Chinese Academy of Sciences [XDA21090101]
- National Key Research and Development Program of China [2019YFB1504503]
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A novel hydrophilic-modified gas diffusion layer (GDL) with Polyacrylonitrile (PAN) has been fabricated to improve the performance of proton exchange membrane fuel cells (PEMFCs) under low humidity. The addition of PAN in the cathode GDL significantly increases the power density by 30% under low humidity, without affecting the performance under full humidity.
A novel hydrophilic-modified gas diffusion layer (GDL) through inserting the polyacrylonitrile (PAN) into the microporous layer is fabricated to elevate the performance of the proton exchange membrane fuel cells (PEMFCs) under low humidfication. The single fuel cell test confirms that the membrane electrode assembly with 3 wt% addition of PAN in the cathode GDL exhibits a maximum power density of 0.616 W cm(-2), which is 30% higher than that of conventional hydrophobic GDL (0.480 W cm(-2)) under low humidity. This significant enhancement in performance is attributed to the powerful wettability and the pore structure modification of the PAN. Besides, the introduction of PAN shows little influence on the performance of PEMFCs under full humidity. Our findings reported here shed new light on developing a robust GDL that can be used in both low and high humidification.
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