Caractérisation de la structure des membranes ionomères (NAFION®) par diffusion de rayons X aux petits angles
Résumé
Ionomer membranes, like Nafion® used in fuel cell, present a nano-phase separation between domains with different ionic concentrations. Up to now models describe the ionic domains as spheres of about 40 Å diameter. Small angles X-ray scattering studies over a large range of wave vectors, lead to a new assumption for the Nafion structure, describing the polymer aggregation as elongated objects surrounding by the ionic charges. © EDP Sciences.