期刊
JOURNAL OF POWER SOURCES
卷 295, 期 -, 页码 221-227出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2015.07.001
关键词
Proton exchange membrane; Hydrocarbon-based membrane; Cerium composite membrane; Oxidative stability; Radical quencher
资金
- Korea Institute of Energy Research (KIER) [B5-2415]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) [20143030031340]
- Civil Military Cooperation Program of Civil Military Technology Cooperation Center from the Ministry of Trade, Industry Energy [13-DU-SP-01-MKE]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20143030031340] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Hydrocarbon-based cerium composite membranes were prepared for proton exchange membrane fuel cell applications to increase oxidative stability. Different amounts of cerium ions were impregnated in sulfonated poly(arylene ether sulfone) (SPES) membranes and their physicochemical properties were investigated according to the cerium content. Field-emission scanning electron microscopy and inductively coupled plasma analyses confirmed the presence of cerium ions in the composite membranes and H-1 NMR indicated the successful coordination of sulfonic acid groups with the metal ions. Increasing amounts of cerium ions resulted in decreases in the proton conductivity and water uptake, but enhanced oxidative stability. The oxidative stability of the composite membranes was proven via a hydrogen peroxide exposure experiment which mimicked fuel cell operating conditions. In addition, more than 2200 h was achieved with the composite membrane under in situ accelerated open circuit voltage (OCV) durability testing (DOE protocol), whereas the corresponding pristine SPES membrane attained only 670 h. (C) 2015 Elsevier B.V. All rights reserved.
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