Metal-salt enhanced grafting of vinylpyridine and vinylimidazole monomer combinations in radiation grafted membranes for high-temperature PEM fuel cells

Rajabalizadeh Mojarrad, Naeimeh and Sadeghi, Sahl and Yarar Kaplan, Begüm and Güler, Enver and Alkan Gürsel, Selmiye (2020) Metal-salt enhanced grafting of vinylpyridine and vinylimidazole monomer combinations in radiation grafted membranes for high-temperature PEM fuel cells. ACS Applied Energy Materials, 3 (1). pp. 532-540. ISSN 2574-0962

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Abstract

Proton exchange membranes were prepared and characterized for utilization in high-temperature proton exchange membrane fuel cells, HT-PEMFCs. 1-vinylimidazole (1-VIm) and 4-vinylpyridine (4VP) monomers were simultaneously grafted onto pre-irradiated ETFE (ethylene-co-tetrafluoroethylene) films which were prepared using gamma-rays with a dose of 100 kGy, as a robust substrate to prepare acid-base composite membranes. The grafting reaction was performed at 60 degrees C for 24 h followed by protonation via phosphoric acid doping in the subsequent step. The effect of adding ferrous salts as promoters in grafting was investigated by characterization of resultant membranes via thermal gravimetric analysis and mechanical tests. The fuel cell tests were conducted under different relative humidities (RHs) and applied temperatures. Membranes prepared with salt addition exhibited superior proton conductivities. Results including up to 80 mS cm(-1) conductivity at 110 degrees C in 60% RH and excellent thermal stability, even at 300 degrees C, suggest these membranes are promising for HT-PEMFC applications.
Item Type: Article
Uncontrolled Keywords: radiation-induced grafting; PEM fuel cell; salt-induced grafting; 1-vinylimidazole; 4-vinylpyridine
Subjects: T Technology > T Technology (General)
T Technology > TP Chemical technology > TP0155-156 Chemical engineering
Q Science > QD Chemistry
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TP Chemical technology > TP1080 Polymers and polymer manufacture
Divisions: Faculty of Engineering and Natural Sciences > Basic Sciences > Chemistry
Faculty of Engineering and Natural Sciences > Academic programs > Materials Science & Eng.
Sabancı University Nanotechnology Research and Application Center
Faculty of Engineering and Natural Sciences
Depositing User: Selmiye Alkan Gürsel
Date Deposited: 09 Jul 2020 13:45
Last Modified: 09 Jul 2020 13:45
URI: https://research.sabanciuniv.edu/id/eprint/40015

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