Influence of the porous transport layer properties on the mass and charge transfer in a segmented PEM electrolyzer
| Autor: | Rémi Bligny, Didier Stemmelen, Christian Moyne, Julian Parra-Restrepo, Jérôme Dillet, Gaël Maranzana, Sophie Didierjean, Alain Degiovanni |
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| Přispěvatelé: | Laboratoire Énergies et Mécanique Théorique et Appliquée (LEMTA ), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Agence de l'Environnement et de la Maîtrise de l'Energie (ADEME), Laboratoire d'Energétique et de Mécanique Théorique Appliquée (LEMTA ) |
| Rok vydání: | 2020 |
| Předmět: |
Electrolysis
Materials science Water transport Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences 7. Clean energy 0104 chemical sciences Anode Dielectric spectroscopy law.invention [SPI]Engineering Sciences [physics] Fuel Technology law Composite material 0210 nano-technology Porosity Current density Polymer electrolyte membrane electrolysis |
| Zdroj: | International Journal of Hydrogen Energy International Journal of Hydrogen Energy, Elsevier, 2020, 45 (15), pp.8094-8106. ⟨10.1016/j.ijhydene.2020.01.100⟩ International Journal of Hydrogen Energy, Elsevier, 2020, ⟨10.1016/j.ijhydene.2020.01.100⟩ |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2020.01.100 |
| Popis: | International audience; h i g h l i g h t s The influence of the PTL properties on the electrolyzer performance was investigated. Optimal performance was obtained for an average pore size of 10 mm and porosity of 31%. The pressure influence on the mass transport limitations was proved. Current density heterogeneities were observed with a segmented PEM electrolyzer. A new model for the constriction resistance in the catalyst layer was developed. Porous transport layer Segmented electrolyzer Mass transport limitations a b s t r a c t A titanium Porous Transport Layer (PTL) is usually used at the anode side of PEM water electrolyzers to ensure both the gas/water transport and the electric charges transfer. In this paper, four different sintered Ti powder PTLs were characterized to determine some properties, such as the pore size distribution, the porosity, and the permeability. Their influence on the electrolysis performance was investigated by using a 30 cm 2 segmented cell which allowed measuring the current density distribution, while controlling temperature and pressure conditions. For a better understanding, in-situ techniques such as the Polarization Curves and the Electrochemical Impedance Spectroscopy (EIS) were used. A local characterization of mass transport limitations caused by oxygen saturation was carried out, paying special attention to the pressure influence when using a PTL with very small pores. The results showed that current density heterogeneities can be explained by microstructure changes along the PTL. The optimal geometric characteristics of the PTL depend not only on the operating conditions such as current density, pressure, and temperature but also on the catalyst layer properties. A new model for the constriction resistance between the catalyst layer and the PTL was proposed. ScienceDirect j ou rnal h ome pag e: www.elsevier.com/loca te/he i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y 4 5 (2 0 2 0) 8 0 9 4 e8 1 0 6 |
| Databáze: | OpenAIRE |
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