Performance of Quaternized Polybenzimidazole-Cross-Linked Poly(vinylbenzyl chloride) Membranes in HT-PEMFCs
Arslan F, Chuluunbandi K, Freiberg AT, Kormanyos A, Sit F, Cherevko S, Kerres J, Thiele S, Böhm T (2021)
Publication Type: Journal article
Publication year: 2021
Journal
Book Volume: 13
Pages Range: 56584-56596
Journal Issue: 47
Abstract
High-temperature proton-exchange membrane fuel cells (HT-PEMFCs) are mostly based on acid-doped membranes composed of polybenzimidazole (PBI). A severe drawback of acid-doped membranes is the deterioration of mechanical properties upon increasing acid-doping levels. Cross-linking of different polymers is a way to mitigate stability issues. In this study, a new ion-pair-coordinated membrane (IPM) system with quaternary ammonium groups for the application in HT-PEMFCs is introduced. PBI cross-linked with poly(vinylbenzyl chloride) and quaternized with three amines (DABCO, quinuclidine, and quinuclidinol) are manufactured and compared to the state-of-the-art commercial Dapazol PBI membrane ex situ as well as by evaluating their HT-PEMFC performance. The IPMs show reduced swelling and better mechanical properties upon doping, which enables a reduction in membrane thickness while maintaining a comparably low gas crossover and mechanical stability. The HT-PEMFC based on the best-performing IPM reaches up to 530 mW cm-2 at 180 °C under H2/air conditions at ambient pressure, while Dapazol is limited to less than 430 mW cm-2 at equal parameters. This new IPM system requires less acid doping than conventional PBI membranes while outperforming conventional PBI membranes, which renders these new membranes promising candidates for application in HT-PEMFCs.
Authors with CRIS profile
Involved external institutions
Germany (DE)How to cite
APA:
Arslan, F., Chuluunbandi, K., Freiberg, A.T., Kormanyos, A., Sit, F., Cherevko, S.,... Böhm, T. (2021). Performance of Quaternized Polybenzimidazole-Cross-Linked Poly(vinylbenzyl chloride) Membranes in HT-PEMFCs. ACS Applied Materials and Interfaces, 13(47), 56584-56596. https://doi.org/10.1021/acsami.1c17154
MLA:
Arslan, Funda, et al. "Performance of Quaternized Polybenzimidazole-Cross-Linked Poly(vinylbenzyl chloride) Membranes in HT-PEMFCs." ACS Applied Materials and Interfaces 13.47 (2021): 56584-56596.
BibTeX: Download