| Téléchargement | - Voir le manuscrit accepté : Low equivalent weight short-side-chain perfluorosulfonic acid ionomers in fuel cell cathode catalyst layers (PDF, 1.5 Mio)
|
|---|
| DOI | Trouver le DOI : https://doi.org/10.1016/j.jpowsour.2011.03.024 |
|---|
| Auteur | Rechercher : Lei, Chao1; Rechercher : Bessarabov, Dmitri; Rechercher : Ye, Siyu; Rechercher : Xie, Zhong1; Rechercher : Holdcroft, Steven1; Rechercher : Navessin, Titichai1 |
|---|
| Affiliation | - Conseil national de recherches du Canada. Institut d'innovation en piles à combustible du CNRC
|
|---|
| Format | Texte, Article |
|---|
| Sujet | fuel cell; catalyst layer; short-side-chain ionomer; MEA; equivalent weight |
|---|
| Résumé | The morphology and fuel cell performance of cathode catalyst layers (CCLs) using low equivalent weight (EW) short-side-chain (SSC) perfluorosulfonic acid ionomers have been investigated in this work. The results were compared with those for a baseline CCL containing 30 wt% of the conventional ionomer 1100 EW Nafion®. The CCLs fabricated with 10–20 wt% of the AquivionTM ionomer displayed a similar morphology to the Nafion®-based CCLs. Electrochemical surface areas (ECSA) and double layer capacitances of all the AquivionTM-based samples were similar to those of the baseline. The oxygen reduction reaction (ORR) kinetics in CCLs with 20 wt% and 30 wt% AquivionTM were lower than the baseline under 100% relative humidity (RH), yet similar to the baseline at 70% RH. In situ electrochemical impedance spectroscopy (EIS) measurements suggested that the lowered ORR kinetics at 100% RH may be attributed to the large mass transport resistance in AquivionTM-based samples at low current densities. Relative to the baseline, CCLs containing 20 wt% AquivionTM ionomer demonstrated an improvement in fuel cell performance under operating conditions of 95 ◦C and RH values of 30, 50 and 70%. The greater hydrophilicity of the SSC ionomers is believed to account for the improved fuel cell performance at the relatively higher operating temperature and dry conditions. |
|---|
| Date de publication | 2011-03-22 |
|---|
| Dans | |
|---|
| Langue | anglais |
|---|
| Publications évaluées par des pairs | Oui |
|---|
| Numéro NPARC | 19589005 |
|---|
| Exporter la notice | Exporter en format RIS |
|---|
| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
|---|
| Identificateur de l’enregistrement | 5f48731f-a5d8-4734-b637-8f903366b0f6 |
|---|
| Enregistrement créé | 2012-03-03 |
|---|
| Enregistrement modifié | 2020-04-21 |
|---|
