Neutron imaging of operando proton exchange membrane fuel cell with novel membrane
| Autor: | Alessandro Tengattini, Cristina Iojoiu, Huu-Dat Nguyen, Duncan Atkins, Sébastien Rosini, Fabrice Micoud, Arnaud Morin, Sandrine Lyonnard, Sylvie Escribano, Gérard Gebel, Jongmin Lee |
|---|---|
| Přispěvatelé: | Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Matériaux Interfaces ELectrochimie (MIEL), Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces (LEPMI), Institut de Chimie du CNRS (INC)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Institut de Chimie du CNRS (INC)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Institut Laue-Langevin (ILL), ILL, Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Energy Engineering and Power Technology Proton exchange membrane fuel cell 02 engineering and technology 010402 general chemistry 7. Clean energy 01 natural sciences law.invention chemistry.chemical_compound law Electrical and Electronic Engineering Physical and Theoretical Chemistry Ionomer ComputingMilieux_MISCELLANEOUS chemistry.chemical_classification Renewable Energy Sustainability and the Environment Neutron imaging Polymer 021001 nanoscience & nanotechnology Cathode 0104 chemical sciences Anode Membrane [CHIM.POLY]Chemical Sciences/Polymers chemistry Chemical engineering 0210 nano-technology Current density |
| Zdroj: | Journal of Power Sources Journal of Power Sources, Elsevier, 2021, 496, pp.229836. ⟨10.1016/j.jpowsour.2021.229836⟩ Journal of Power Sources, 2021, 496, pp.229836. ⟨10.1016/j.jpowsour.2021.229836⟩ |
| ISSN: | 0378-7753 1873-2755 |
| Popis: | The performance of an alternative membrane based on aromatic multiblock copolymer was compared to that of the conventional perfluorosulfonic acid (PFSA) polymer membrane during fuel cell operation. The fuel cell with the alternative membrane exhibited more severe voltage loss than the conventional at current densities above 0.6 A/cm2 with fully saturated reactants. To rationalize this difference, operando high-resolution neutron imaging was used to investigate water distribution in the fuel cells, in parallel with impedance measurements. The type of membrane strongly affected water distribution, not only from anode to cathode, but also in-plane between ribs and channels. Specifically, in the alternative membrane, ionomer in cathode catalyst layer was less hydrated and dried as current density increased. The voltage loss with the alternative membrane was ascribed to ionomer drying rather than to the accumulation of liquid water, in accordance with the evolution of ohmic resistance. Furthermore, the alternative membrane experienced swell/shrinkage resulting in material shifts during the operation. These results pinpoint that developing new ionomers for fuel cells require not only to quantify the bulk transport properties of alternative membranes compared to PFSA, but also to evaluate their interfacial properties and the impact of ionomer on water management. |
| Databáze: | OpenAIRE |
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