Novel phosphoric acid-doped PBI-blends as membranes for high-temperature PEM fuel cells
Mack F, Aniol K, Ellwein C, Kerres J, Zeis R (2015)
Publication Type: Journal article
Publication year: 2015
Journal
Book Volume: 3
Pages Range: 10864-10874
Journal Issue: 20
DOI: 10.1039/c5ta01337b
Abstract
Novel acid-base blend membranes for application in high-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) were synthesized and characterized. The acid-base blend membranes demonstrated high thermal and excellent chemical stabilities in terms of oxidative weight loss. Small changes in the molecular weight distribution after immersion in Fenton's solution were determined with gel permeation chromatography (GPC). Scanning electron microscope (SEM) images showed the outstanding integrity of the acid-base blend membranes after a 24 hour-long Fenton's test. In contrast to pure polybenzimidazole (PBI) and AB-PBI membranes the new acid-base membranes exhibited long-term stability in phosphoric acid (PA) at 130 °C. Ionic cross-linking between acid and base blend polymers improved the stability and integrity of the membranes. The in situ conductivities of several acid-base blend membranes were higher than that of pure AB-PBI membranes with drastically reduced acid uptake. Membrane electrode assemblies (MEAs) based on these blend membranes were prepared showing good fuel cell performance at practical relevant operation conditions. This study proves that acid-base blends are a suitable alternative to pure PBI and AB-PBI as membranes for HT-PEMFCs.
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Germany (DE)How to cite
APA:
Mack, F., Aniol, K., Ellwein, C., Kerres, J., & Zeis, R. (2015). Novel phosphoric acid-doped PBI-blends as membranes for high-temperature PEM fuel cells. Journal of Materials Chemistry A, 3(20), 10864-10874. https://doi.org/10.1039/c5ta01337b
MLA:
Mack, Florian, et al. "Novel phosphoric acid-doped PBI-blends as membranes for high-temperature PEM fuel cells." Journal of Materials Chemistry A 3.20 (2015): 10864-10874.
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