PTFE distribution in high-temperature PEM electrodes and its effect on the cell performance
Mack F, Morawietz T, Hiesgen R, Kramer D, Zeis R (2013)
Publication Type: Conference contribution
Publication year: 2013
Journal
Publisher: Electrochemical Society Inc.
Book Volume: 58
Pages Range: 881-888
Conference Proceedings Title: ECS Transactions
ISBN: 9781607684459
Abstract
A conventional high-temperature polymer electrolyte membrane (HT-PEM) fuel cell electrode primarily consists of carbonsupported platinum catalyst and nonconductive binder PTFE. Morphology and topography of the electrodes were determined with scanning electron microscopy (SEM), and local surface conductivity measurements of the electrode surfaces were done with atomic force microscopy (AFM). Particle size distribution on the electrode surface was investigated and single PTFE particles in the catalyst layer were resolved. A great influence of the PTFE content in the electrodes on the performance of membrane electrode assemblies (MEA) was observed in single cell experiments. Reducing the PTFE content resulted in a decrease of the internal resistance of the MEA and improvement of the phosphoric acid uptake and its distribution in the cell. Both properties helped enhance the fuel cell performance. © The Electrochemical Society.
Authors with CRIS profile
Involved external institutions
Helmholtz Institut Ulm
Germany (DE)
Hochschule Esslingen University of Applied Sciences
Germany (DE)
Germany (DE)
Hochschule Esslingen University of Applied Sciences
Germany (DE)
How to cite
APA:
Mack, F., Morawietz, T., Hiesgen, R., Kramer, D., & Zeis, R. (2013). PTFE distribution in high-temperature PEM electrodes and its effect on the cell performance. In ECS Transactions (pp. 881-888). Electrochemical Society Inc..
MLA:
Mack, Florian, et al. "PTFE distribution in high-temperature PEM electrodes and its effect on the cell performance." Proceedings of the ECS Transactions Electrochemical Society Inc., 2013. 881-888.
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