کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10568146 | 973398 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterisation of zirconium and titanium phosphates and direct methanol fuel cell (DMFC) performance of functionally graded Nafion(R) composite membranes prepared out of them
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Characterisation of zirconium and titanium phosphates and direct methanol fuel cell (DMFC) performance of functionally graded Nafion(R) composite membranes prepared out of them Characterisation of zirconium and titanium phosphates and direct methanol fuel cell (DMFC) performance of functionally graded Nafion(R) composite membranes prepared out of them](/preview/png/10568146.png)
چکیده انگلیسی
Pure layered phosphates of varying crystalline phases and crystallinity and composites of gradient layers of zirconium phosphate in Nafion 117-membranes have been prepared. The proton conductivity and, in case of the composites, also the dynamic mechanical properties of these materials were measured under different conditions of temperature and humidity. Membrane-electrode assemblies with low platinum catalyst loading of 0.4 mg cmâ2 Pt at the cathode and 1.9 mg cmâ2 Pt-Ru at the anode were examined in a direct methanol fuel cell (DMFC) at medium temperatures (130 °C). The conductivity of the layered zirconium phosphates is superior to the titanium phosphates and increases with decreasing crystallite size. The electrical performance of the composites in a DMFC-environment is slightly decreased as compared to the unmodified membrane but taking the reduced methanol crossover into account, higher efficiencies can be reached with the zirconium phosphate modified membrane. Furthermore, the mechanical properties are significantly improved by the presence of the inorganic compound.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 145, Issue 2, 18 August 2005, Pages 101-107
Journal: Journal of Power Sources - Volume 145, Issue 2, 18 August 2005, Pages 101-107
نویسندگان
F. Bauer, M. Willert-Porada,