کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
633667 | 1456042 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fluorene-containing poly(arylene ether sulfone)s as anion exchange membranes for alkaline fuel cells
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
A series of novel quaternized fluorene-containing poly(arylene ether sulfone)s (APESs) were synthesized. Bromination rather than chloromethylation was used for the conversion of -CH3 to reactive -CH2Br. N,N,N׳,N׳-tetramethyl-1,6-diaminohexane (TMHDA) dissolved in isopropanol (IPA) was used as a quaternization reagent for the preparation of target anion exchange membranes (AEMs). Fourier transform infrared spectroscopy (FT-IR), 1H NMR spectroscopy and gel permeation chromatography (GPC) were used to characterize the as-synthesized copolymers. The ratio of hydrophilic to hydrophobic monomers was varied to study the structure property of the AEMs. The obtained AEMs were characterized by scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). Water uptake (WU), swelling ratio, ionic exchange capacity (IEC), ionic conductivity, methanol permeability and alkaline stability were also studied. These AEMs have good properties as polymer electrolyte materials with high ionic conductivity (under hydrated conditions) in the range 2.89-8.85Ã10â2 S cmâ1 and 5.60-15.64Ã10â2 S cmâ1 at 30 and 80 °C, respectively. The methanol permeability of the AEMs in the range 5.99-14.51Ã10â8 cm sâ1 is lower than that of Naï¬on® 117 (1.82Ã10â6 cm sâ1). The AEMs show excellent alkaline stability in 1 M KOH solution at 60 °C for a long time. Single cell testing using APES-0.8 showed an open circuit voltage of 0.89 V. A maximum power density of 146 mW cmâ2 at a current density of 423 mA cmâ2 can be achieved at 60 °C. In summary the AEMs are good candidates for evaluation in fuel cell applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 457, 1 May 2014, Pages 29-38
Journal: Journal of Membrane Science - Volume 457, 1 May 2014, Pages 29-38
نویسندگان
Pei Yu Xu, Ke Zhou, Guang Lu Han, Qiu Gen Zhang, Ai Mei Zhu, Qing Lin Liu,