Here this work reports the characterization of catalyst layer (CL) structure and composition for a set of gas-diffusion electrodes (GDEs) fabricated by different coating methods with the goal of developing a better understanding of CL processing-structure-property-performance relationships. The CL coating techniques used in this study were ultrasonic spray coating, and two roll-to-roll (R2R) methods - gravure and slot die. Scanning transmission electron microscopy (STEM) coupled with X-ray energy dispersive spectroscopy (EDS) analysis of GDE cross-sections provided bulk information, while scanning electron microscopy (SEM) with EDS and X-ray photoelectron spectroscopy (XPS) were used to investigate the near surface and surface composition of the CLs that will be in direct contact with the membrane once the membrane electrode assembly (MEA) is constructed. This study demonstrates that common quantification parameters, namely the F:Pt ratio extracted from cross-sectional STEM-EDS maps and top-down CL measurements with SEM and XPS, along with roughness parameters quantified from SEM micrographs are useful parameters in explaining and potentially predicting performance trends. Additionally, it highlights the importance of understanding key CL surface properties for advancing the manufacturability of high-performance components for polymer electrolyte membrane (PEM) technologies.
Medina, Samantha, et al. "Multi-technique characterization of spray coated and roll-to-roll coated gas diffusion fuel cell electrodes." Journal of Power Sources, vol. 560, Jan. 2023. https://doi.org/10.1016/j.jpowsour.2023.232670
Medina, Samantha, Foster, Jayson G., Dzara, Michael J., Wang, Min, Ulsh, Michael, Mauger, Scott A., & Pylypenko, Svitlana (2023). Multi-technique characterization of spray coated and roll-to-roll coated gas diffusion fuel cell electrodes. Journal of Power Sources, 560. https://doi.org/10.1016/j.jpowsour.2023.232670
Medina, Samantha, Foster, Jayson G., Dzara, Michael J., et al., "Multi-technique characterization of spray coated and roll-to-roll coated gas diffusion fuel cell electrodes," Journal of Power Sources 560 (2023), https://doi.org/10.1016/j.jpowsour.2023.232670
@article{osti_1961152,
author = {Medina, Samantha and Foster, Jayson G. and Dzara, Michael J. and Wang, Min and Ulsh, Michael and Mauger, Scott A. and Pylypenko, Svitlana},
title = {Multi-technique characterization of spray coated and roll-to-roll coated gas diffusion fuel cell electrodes},
annote = {Here this work reports the characterization of catalyst layer (CL) structure and composition for a set of gas-diffusion electrodes (GDEs) fabricated by different coating methods with the goal of developing a better understanding of CL processing-structure-property-performance relationships. The CL coating techniques used in this study were ultrasonic spray coating, and two roll-to-roll (R2R) methods - gravure and slot die. Scanning transmission electron microscopy (STEM) coupled with X-ray energy dispersive spectroscopy (EDS) analysis of GDE cross-sections provided bulk information, while scanning electron microscopy (SEM) with EDS and X-ray photoelectron spectroscopy (XPS) were used to investigate the near surface and surface composition of the CLs that will be in direct contact with the membrane once the membrane electrode assembly (MEA) is constructed. This study demonstrates that common quantification parameters, namely the F:Pt ratio extracted from cross-sectional STEM-EDS maps and top-down CL measurements with SEM and XPS, along with roughness parameters quantified from SEM micrographs are useful parameters in explaining and potentially predicting performance trends. Additionally, it highlights the importance of understanding key CL surface properties for advancing the manufacturability of high-performance components for polymer electrolyte membrane (PEM) technologies.},
doi = {10.1016/j.jpowsour.2023.232670},
url = {https://www.osti.gov/biblio/1961152},
journal = {Journal of Power Sources},
issn = {ISSN 0378-7753},
volume = {560},
place = {United States},
publisher = {Elsevier},
year = {2023},
month = {01}}
Edwards, Mårten O. M.; Karlsson, Patrik G.; Eriksson, Susanna K.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 785https://doi.org/10.1016/j.nima.2015.02.047