1. Humidity-Induced Mechanical Behavior and Proton Transport Mechanism in Aromatic Multiblock Ionomer Membranes
- Author
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Lionel Flandin, Thi Khanh Ly Nguyen, Huu-Dat Nguyen, Sandrine Lyonnard, Nicolas Charvin, Cristina Iojoiu, Emilie Planes, Genèse et Usage d'Interfaces Durables pour l'Energie (GUIDE), 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), Matériaux Interfaces ELectrochimie (MIEL), Synthèse, Structure et Propriétés de Matériaux Fonctionnels (STEP ), SYstèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé (SYMMES), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-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)-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)-Université Grenoble Alpes (UGA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA), Département Interfaces pour l'énergie, la Santé et l'Environnement (DIESE), ANR-16-CE05-0016,NSPEM,Ionomères et membranes nanostructurés avec architectures controlées pour les PEMFC(2016), ANR-10-LABX-0044,CEMAM,Center of Excellence in Multifunctional Architectured Materials(2010), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)
- Subjects
Materials science ,Nafion ,Energy Engineering and Power Technology ,Proton exchange membrane fuel cell ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,[SPI.MAT]Engineering Sciences [physics]/Materials ,fuel cell ,chemistry.chemical_compound ,aromatic ionomer ,Proton transport ,transport mechanism ,Materials Chemistry ,Electrochemistry ,medicine ,Chemical Engineering (miscellaneous) ,Dehydration ,Electrical and Electronic Engineering ,skin and connective tissue diseases ,Ionomer ,food and beverages ,Humidity ,021001 nanoscience & nanotechnology ,medicine.disease ,humanities ,0104 chemical sciences ,mechanical property ,Membrane ,chemistry ,Chemical engineering ,Fuel cells ,sense organs ,proton-exchange membrane ,0210 nano-technology - Abstract
International audience; During the operation of proton-exchange membrane fuel cells, the membrane–electrode assemblies are submitted to hydration/dehydration cycles because of the changes in temperature and relative humidity. It is therefore essential to understand the effect of these conditions on the membranes’ mechanical properties and transport mechanism. Although multiblock aromatic ionomers are promising alternative materials to Nafion, the mechanical properties during hydration/dehydration and their effect on the proton transport mechanism in these materials are not well understood. In this work, the interplay between the humidity-induced mechanical behavior and the proton transport mechanism in multiblock aromatic ionomers was systematically studied, as compared with those of Nafion. The water vapor transport mechanism in terms of sorption and diffusion was first investigated by dynamical vapor sorption. Then, the impact of hydration and dehydration on the membrane mechanical properties was elucidated using a dynamic mechanical analysis device coupled with a temperature- and humidity-controlled chamber. An innovative understanding of these polymers could be proposed by comparing the kinetics of water clustering to the consequences on the elastic properties. A major outcome is the estimation of a relative amount of isolated and clustered water molecules.
- Published
- 2021
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