کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7739820 | 1497992 | 2013 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Cross-linked poly(vinyl alcohol)/poly (diallyldimethylammonium chloride) as anion-exchange membrane for fuel cell applications
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Cross-linked poly(vinyl alcohol)/poly (diallyldimethylammonium chloride) as anion-exchange membrane for fuel cell applications Cross-linked poly(vinyl alcohol)/poly (diallyldimethylammonium chloride) as anion-exchange membrane for fuel cell applications](/preview/png/7739820.png)
چکیده انگلیسی
The novel, low-cost anion-exchange membranes (abbreviated as PVA/PDDA-OHâ), made from poly(vinyl alcohol) and poly(diallyldimethylammonium chloride) blends, are successfully synthesized by a combined thermal and chemical cross-linking technique. The hydroxide (OHâ) conductivity, water uptake, ion exchange capacity (IEC), thermal stability, oxidative stability and alkaline stability of PVA/PDDA-OHâ membranes are measured to evaluate their applicability in alkaline fuel cells. The effects of cross-linking procedure, cross-linking time and membrane composition on OHâ conductivity are studied using AC impedance technique. It is found that by cross-linking modifications, the membranes exhibit excellent thermal stability with onset degradation temperature high above 170 °C, a relatively high oxidative stability at 60 °C, and a strong alkaline stability in 8 M KOH at 80 °C. High OHâ conductivity of 0.025 S cmâ1 is achieved at 25 °C and reaches up to 0.037 S cmâ1 at 80 °C. For exploring the conducting mechanisms, the concentration and mobility of charge carries of the membranes are also measured. The H2/O2 fuel cell tests with PVA/PDDA-OHâ membranes yield the peak power density of 11.5 mW cmâ2 and greatly increase to 35.1 mW cmâ2 depending on PVA/PDDA mass ratio, on a low metal loading on both the anode and the cathode of 0.5 mg (Pt) cmâ2 at ambient temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 240, 15 October 2013, Pages 359-367
Journal: Journal of Power Sources - Volume 240, 15 October 2013, Pages 359-367
نویسندگان
Jing Zhang, Jinli Qiao, Gaopeng Jiang, Lingling Liu, Yuyu Liu,