کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7737356 1497978 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparing shut-down strategies for proton exchange membrane fuel cells
ترجمه فارسی عنوان
مقایسه استراتژی های تعطیل برای سلول های سوختی غشای تبادل پروتون
کلمات کلیدی
استراتژی سیستم، راه اندازی و تعطیل، خوردگی کربن، حمایت کاتالیستی، سلول سوختی غشای تبادل پروتون،
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی
Application of system strategies for mitigating carbon corrosion of the catalyst support in proton exchange fuel cells (PEMFCs) is a requirement for PEMFC systems, especially in the case of systems for transport application undergoing thousands of start-ups and shut-downs (SU/SD) during its lifetime. This study compares several of the most common shut-down strategies for 1100 cycles SU/SD cycles at 70 °C and 80% RH using commercially available fuel cell components. Each cycle simulates a prolonged shut-down, i.e. finishing each cycle with air filled anode and cathode. Furthermore, all start-ups are unprotected, i.e. introducing the H2 rich gas into an air filled anode. Finally, each cycle also includes normal fuel cell operation at 0.5 A cm−2 using synthetic reformate/air. H2 purge of the cathode and O2 consumption using a load were found to be the most effective strategies. The degradation rate using the H2 purge strategy was 23 μV cycle−1 at 0.86 A cm−2 using H2 and air at the anode and cathode, respectively. This degradation rate may be regarded as a generally low value, especially considering that this value also includes the degradation rate caused by unprotected start-ups.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 254, 15 May 2014, Pages 232-240
نویسندگان
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