Impact of a Compressive Stress on Water Sorption and Diffusion in Ionomer Membranes for Fuel Cells. A 1 H NMR Study in Vapor-Equilibrated Nafion

Abstract : The electrolyte membrane is exposed to high compression loads when operating in a proton exchange membrane fuel cell (PEMFC). It was reported in the literature that compression impacts the membrane properties when immersed in liquid water but little is known about the quantitative effects of stress on water sorption and its dynamical properties when the membrane is at equilibrium with a humid gas. In this work, we investigated the influence of a static normal stress on the properties of Nafion® by pulsed field gradient NMR (PFGNMR) with a NMR compatible compression device. The results demonstrated a reduction in water content due to compression at high relative humidity (≥ 90% RH) and much more moderate effects at low hydration (≤ 85% RH). The changes observed on the diffusion properties are more pronounced and related to both water loss and a reversible modification of the membrane structure effective at the micrometric scale.
Type de document :
Article dans une revue
Macromolecules, American Chemical Society, 2016, 49 (19), pp.7296-7307. 〈10.1021/acs.macromol.6b01625〉
Liste complète des métadonnées

https://hal.univ-lorraine.fr/hal-01527628
Contributeur : Sebastien Leclerc <>
Soumis le : mercredi 24 mai 2017 - 17:14:42
Dernière modification le : mardi 21 août 2018 - 09:46:03
Document(s) archivé(s) le : lundi 28 août 2017 - 00:59:04

Licence


Distributed under a Creative Commons Paternité - Pas d'utilisation commerciale - Partage selon les Conditions Initiales 4.0 International License

Identifiants

Citation

Assma El Kaddouri, Jean-Christophe Perrin, Thibaut Colinart, Christian Moyne, Sébastien Leclerc, et al.. Impact of a Compressive Stress on Water Sorption and Diffusion in Ionomer Membranes for Fuel Cells. A 1 H NMR Study in Vapor-Equilibrated Nafion. Macromolecules, American Chemical Society, 2016, 49 (19), pp.7296-7307. 〈10.1021/acs.macromol.6b01625〉. 〈hal-01527628〉

Partager

Métriques

Consultations de la notice

288

Téléchargements de fichiers

193