کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
636514 | 1456128 | 2010 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhanced transport performance of sulfonated mesoporous benzene-silica incorporated poly(ether ether ketone) composite membranes for fuel cell application
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Sulfonated poly(ether ether ketone) (sPEEK)/mesoporous benzene-silica electrolyte composite membranes were prepared using a solvent casting method. The two components were mixed thoroughly in N,N-dimethyl acetamide, at various concentrations up to 20 wt% of the mesoporous benzene-silica powder. The degree of sulfonation was 65% for sPEEK, and the ion-exchange capacity of mesoporous benzene-silica was 0.60 mequiv./g. The mesoporous benzene-silica material had a 2D hexagonal (p6mm) mesostructure with a pore diameter of 2.7 nm. The composite membranes exhibited higher proton conductivities than a pristine sPEEK membrane, and the proton conductivity increased with temperature. However, the sPEEK-based composite membranes showed very low methanol crossover below 5 Ã 10â7 cm2/s, but this value was still in the same range as the pristine sPEEK membrane. A maximum proton conductivity of 0.079 S/cm was obtained for the sPEEK-OMB15 membrane at 80 °C, and the highest DMFC cell performance was at 56 mW/cm2, which were approximately 119 and 37% increases compared to the pristine sPEEK membrane, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 351, Issues 1â2, 1 April 2010, Pages 58-64
Journal: Journal of Membrane Science - Volume 351, Issues 1â2, 1 April 2010, Pages 58-64
نویسندگان
Eun-Bum Cho, Dinh Xuan Luu, Dukjoon Kim,