کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1292758 1497937 2015 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of pinhole location on degradation in polymer electrolyte fuel cells
ترجمه فارسی عنوان
اثر محل حفره در تخریب سلول های سوخت الکترولیتی پلیمر
کلمات کلیدی
سلول سوختی الکترولیت پلیمر، پینوئلس، تخریب الکترودها، سلول جدا شده، خوردگی کربن، میزان انتشار فلوراید، ویژگی های عملکرد سلول سوخت
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی


• Degradation in a fuel cell with various pinholes was investigated.
• Mild defects may result in a temporarily improved performance.
• A correlation between carbon corrosion and hydrogen crossover was evident.
• Defects near the anode inlet have the strongest influence on degradation.
• Fuel starvation resulted in a more severe voltage drop with a perforated membrane.

This work analyses the impact of the location of pinholes in polymer electrolyte fuel cells on the degradation of the electrodes. Defects with a diameter of 0.45 mm were created in a 25 cm2 membrane electrode assembly (MEA) of a fuel cell. The MEA was operated and characterised using a segmented single cell. The effects of the pinholes on degradation were measured and evaluated. Defects affected the fuel cell behaviour during periods of hydrogen starvation, thus accelerating the degradation process of the carbon support as well as the loss of active platinum catalyst surface area. Furthermore, the effects of the induced pinholes on membrane degradation and performance decay were determined.Pinholes close to the anode inlet in general have shown a more severe effect on the fuel cell operation parameters, such as open circuit voltage, performance, membrane resistance and hydrogen crossover, than pinholes at any other locations. Also, electrode degradation was accelerated. These effects were mainly due to locally increased temperatures.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 295, 1 November 2015, Pages 336–348
نویسندگان
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