| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
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
| Organizations | Location | People |
|---|
document
Ex-situ measurement of chemical membrane degradation using photometry
Abstract
Despite the critical role that degradation of the perfluorinated sulfonic acid (PFSA) membrane plays in polymer electrolyte fuel cells (PEFCs), it can so far not be reliably and quickly detected through in-situ characterization methods. To complement in-situ, ex-situ measurement methods are available and can partially be conducted while the cell is in operation. Polymer fragments and fluoride from the degradation of the membrane can be found in the effluent water, leaving the fuel cell. While it is possible to measure membrane degradation outside of the cell, the existing methods have drawbacks or prerequisites on their own. Therefore, the measurement of membrane degradation is proposed using fluoride as the indicator with a zirconium complex (zirco-nyl-2-(4-sulphophenylazo)-1,8-dihydroxy-3,6-naphtalene-disulfonic acid), referred to as SPADNS. The interaction between the complex and fluoride is measured using a photometric method and the quantification is based on the color and intensity shift, caused by the interaction of fluoride with the complex. We find that this method can quantify the fluoride concentration correctly. A comparison to a fluoride-sensitive electrode is conducted and validated using a Bland–Altman correlation. The photometric method also requires smaller sample quantities, reducing the required sample amount to 0.9 ml compared to the 5 to 15 ml required for fluoride-sensitive electrode measurements. Measurement times are also reduced to 60 s per sample, reducing the needed time by more than a factor of 10, compared to measurements with an electrode or through ion chromatography. With this, it is possible to get a complementary information about the state of health of the membrane faster and quantify chemical degradation ex-situ. Chemical membrane degradation can be characterized reliably and in a reasonable timeframe using the proposed method.