| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Bodner, Merit
Graz University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2024In-situ and ex-situ monitoring of membrane degradationin polymer electrolyte fuel cells using advanced analytical techniques
- 2023Induced Hydrogen Crossover Accelerated Stress Test for PEM Water Electrolysis Cells
- 2023Ex-situ measurement of chemical membrane degradation using photometry
- 2023Mechanistic study of fast performance decay of Pt-Cu alloy based catalyst layers for polymer electrolyte fuel cells through electrochemical impedance spectroscopycitations
- 2023Mechanistic study of fast performance decay of PtCu alloy-based catalyst layers for polymer electrolyte fuel cells through electrochemical impedance spectroscopycitations
- 2023Surfactant doped polyaniline coatings for functionalized gas diffusion layers in low temperature fuel cellscitations
- 2023Analysis of PEM Water Electrolyzer Failure Due to Induced Hydrogen Crossover in Catalyst-Coated PFSA Membranescitations
- 2023Modeling of Catalyst Degradation in PEM Fuel Cells Applied to 3D Simulation
- 2023Effects of Catalyst Ink Storage on Polymer Electrolyte Fuel Cellscitations
- 2023Investigation of Gas Diffusion Layer Degradation in Polymer Electrolyte Fuel Cell Via Chemical Oxidationcitations
- 2022Derivate photometry as a method for the determination of fluorine emission rates in polymer electrolyte fuel cells
- 2022Colorimetric method for the determination of fluoride emission rates in polymer electrolyte fuel cells
- 2022Influence of electrode composition and operating conditions on the performance and the electrochemical impedance spectra of polymer electrolyte fuel cells
- 2019Structural Characterization of Membrane-Electrode-Assemblies in High Temperature Polymer Electrolyte Membrane Fuel Cellscitations
- 2017Determining the total fluorine emission rate in polymer electrolyte fuel cell effluent watercitations
Places of action
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article
Structural Characterization of Membrane-Electrode-Assemblies in High Temperature Polymer Electrolyte Membrane Fuel Cells
Abstract
In high temperature polymer electrolyte fuel cells, polybenzimidazolemembranes doped in phosphoric acid are used as electrolytematerial. The membrane thickness directly relate tothe amount of absorbed acid which relate to performance. In this study,we compare scanning electron microscopy and X-raymicro-computed tomography (CT) regarding suitability for determining thestructure of electrolyte membranes. Semi-automatedlayer identification and thickness estimation was used to reduce humanerrors and data processing time. Scanning electronmicroscopy was found reliable for membrane thickness characterizationdespitenecessary destructive sample preparation. WithX-ray CT it was possible to study the cells non-destructively before andaftercell test. This made it possible to identify,so-called hot pressing, as the step in which the membrane lost most ofits thickness.After cell operation, the use of X-ray CT at largefield of view and a recently developed layer detection algorithm made itpossible to visualize compression of the membranein a pattern identical to that of the flow plate channels. Thiscompressionpattern would have been difficult to determine withconventional electron microscopy or X-ray CT without semi-automatedlayerdetection.