Details

Autor(en) / Beteiligte

• Mauger, Scott A.
• Wang, Min
• Cetinbas, Firat C.
• Dzara, Michael J.
• Park, Jaehyung
• Myers, Deborah J.
• Ahluwalia, Rajesh K.
• Pylypenko, Svitlana
• Hu, Leiming
• Litster, Shawn
• Neyerlin, K. C.
• Ulsh, Michael

Titel

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

Ist Teil von

• Journal of power sources, 2021-06, Vol.506

Ort / Verlag

United States: Elsevier

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• This study focuses on determining fabrication conditions to create high-performance roll-to-roll-coated (R2R-coated) 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 spray-coated 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.