Degradation of a PEM fuel cell stack with Nafion® membranes of different thicknesses. Part II : Ex situ diagnosis

Par Conseil national de recherches du Canada

Téléchargement	Voir le manuscrit accepté : Degradation of a PEM fuel cell stack with Nafion® membranes of different thicknesses. Part II : Ex situ diagnosis (PDF, 1.6 Mio)
DOI	Trouver le DOI : https://doi.org/10.1016/j.jpowsour.2012.01.074
Auteur	Rechercher : Yuan, Xiao-Zi¹; Rechercher : Zhang, Shengsheng¹; Rechercher : Ban, Shuai¹; Rechercher : Huang, Cheng¹; Rechercher : Wang, Haijiang¹; Rechercher : Singara, Vengatesan; Rechercher : Fowler, Michael; Rechercher : Schulze, Mathias; Rechercher : Haug, Andrea; Rechercher : Friedrich, K. Andreas; Rechercher : Hiesgen, Renate
Affiliation	Conseil national de recherches du Canada. Institut d'innovation en piles à combustible du CNRC
Format	Texte, Article
Sujet	proton exchange membrane fuel cell; stack; ex situ; durability; idle conditions; degradation
Résumé	Part I of this study carried out membrane electrode assembly degradation of a four-cell stack with Nafion membranes of different thicknesses, including N117, N115, NR212, and NR211, for 1000 h under idle conditions. Through on-line electrochemical measurements it was found that as degradation advanced, cells with thinner membranes experienced much more rapid performance degradation than those with thicker membranes, especially after 800 h of operation, due to a dramatic increase in hydrogen crossover. In the present work we investigate the degradation mechanisms of this four-cell stack using several ex situ diagnostic tools, including scanning electron microscopy (SEM), infrared (IR) imaging, ion chromatography (IC), gas permeability measurement, contact angle measurement, and simulation. The results indicate that the drastic increase in hydrogen crossover is due to membrane thickness loss and pinhole formation.
Date de publication	2012-01-21
Dans	Journal of Power Sources 205 (21 janvier 2012) : 324–334.
Langue	anglais
Publications évaluées par des pairs	Oui
Numéro NPARC	19547532
Exporter la notice	Exporter en format RIS
Signaler une correction	Signaler une correction (s'ouvre dans un nouvel onglet)
Identificateur de l’enregistrement	833eb7d8-d09f-437f-b1a6-26464513d027
Enregistrement créé	2012-02-24
Enregistrement modifié	2020-04-21

Date de modification :: 2024-06-30