Development of high-performance roll-to-roll-coated gas-diffusion-electrode-based fuel cells

JOURNAL OF POWER SOURCES

卷:506

Article

Wang, Min⁶  Cetinbas, Firat C.²  Dzara, Michael J.³  Park, Jaehyung⁴  Myers, Deborah J.⁴  Ahluwalia, Rajesh K.²  Hu, Leiming^5,1  Litster, Shawn^3,5 

[1] Natl Renewable Energy Lab, Chem & Nanosci Ctr, Golden, CO 80401 USA

[2] Argonne Natl Lab, Div Energy Syst, Lemont, IL 60439 USA

[3] Colorado Sch Mines, Dept Chem, Golden, CO 80401 USA

[4] Argonne Natl Lab, Chem Sci & Engn Div, Lemont, IL 60439 USA

[5] Carnegie Mellon Univ, Dept Mech Engn, Pittsburgh, PA 15213 USA

[6] Southern Univ Sci & Technol, Shenzhen 518055, Guangdong, Peoples R China

关键词: PEM fuel Cells;    Roll-to-roll coating;    Gas diffusion electrodes;    Slot die coating;   

DOI  :  10.1016/j.jpowsour.2021.230039

来源: Elsevier

【 摘 要 】

This study focuses on determining fabrication conditions to create high-performance roll-to-roll-coated (R2Rcoated) gas-diffusion electrodes (GDEs) for proton-exchange-membrane fuel cells (PEMFCs). Here, we examine how process conditions influence the distribution of ionomer in the electrode, which is shown to be critical for high performance. Using a combination of Kelvin probe, X-ray photoelectron spectroscopy, and nano-scale X-ray computed tomography we show that formation of an ionomer-rich surface is promoted by using a higher drying rate. We show that R2R-coated GDEs have higher surface ionomer concentration than spray-coated GDEs, which enables these R2R-coated GDEs to not need an additional ionomer overlayer, as is typically the case for spraycoated GDEs. This will reduce the number of processing steps and lower material costs in a manufacturing setting. This work shows that with the appropriate selection of materials, ink formulation, and processing conditions, direct-coated GDEs are a viable pathway for fuel cell manufacturing.

【 授权许可】

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