کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7736431 | 1497970 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Zirconium phosphate reinforced short side chain perflurosulfonic acid membranes for medium temperature proton exchange membrane fuel cell application
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Composite membranes, made of an 830 equivalent weight short-side-chain perfluorosulfonic acid ionomer and containing up to 10 wt% zirconium phosphate (ZrP), are prepared by casting dispersions of ZrP nanoparticles in the ionomer solution. 30 μm thick composite membranes are characterized by transmission electron microscopy, X-ray diffraction, stress-strain tests, conductivity measurements, water uptake and ion-exchange capacity determinations, as well as fuel cell tests in H2/air. In comparison with the neat ionomer, the tensile modulus (E) and the yield stress (Y) of the composite membranes increase with the ZrP content, both at room temperature (ÎE/E up to +75%, ÎY/Y up to +47%) and at 80 °C/70% relative humidity (ÎE/E up to +64%, ÎY/Y up to +103%). Despite their lower hydration, the composite membranes are as conductive as the neat ionomer and the in-plane conductivity at 110 °C ranges from â¼0.005 S cmâ1 at 25% RH to 0.14 S cmâ1 at 90% RH. The fuel cell performance of a catalyst coated membrane loaded with 10 wt% ZrP is weakly affected by temperature in the range 80-110 °C. The peak power density decreases from 0.36 W cmâ2, at 80 °C, to 0.28 W cmâ2 at 110 °C, where the composite membrane performs better than the neat ionomer.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 262, 15 September 2014, Pages 407-413
Journal: Journal of Power Sources - Volume 262, 15 September 2014, Pages 407-413
نویسندگان
Mario Casciola, Paula Cojocaru, Anna Donnadio, Stefano Giancola, Luca Merlo, Yannig Nedellec, Monica Pica, Surya Subianto,