کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7705355 | 1497293 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrochemical impedance analysis with transmission line model for accelerated carbon corrosion in polymer electrolyte membrane fuel cells
ترجمه فارسی عنوان
تجزیه و تحلیل امپدانس الکتروشیمیایی با مدل خط انتقال برای جذب کربن سریع در سلول های سوختی غشای الکترولیتی پلیمر
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کلمات کلیدی
سلول سوختی غشای الکترولیتی پلیمر، طیف سنجی امپدانس الکتروشیمیایی، مدل خط انتقال تخریب کاتد، مقاومت یونی،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
The effects of varying the applied voltage and relative humidity of feed gases in degradation tests of polymer electrolyte membrane fuel cells (PEMFCs) were analyzed using electrochemical impedance spectroscopy (EIS). A transmission line model that considers the proton-transport resistance in the cathode catalyst layer was used to analyze impedance spectra obtained from degraded PEMFCs. As the applied cell voltage was increased from 1.3 to 1.5Â V to induce accelerated degradation, the cell performance decayed significantly due to increased charge- and proton-transfer resistance. The PEMFC degradation was more pronounce at higher relative humidity (RH), i.e. 100% RH, as compared with that observed under 50% RH. Furthermore, changes in the charge transfer resistance of the electrode accompanied changes in the ionic conductivity in the PEMFC catalyst layer. Although the initial ionic and charge-transfer resistances in the catalyst layer were lower under higher RH conditions, the impedance results indicated that the performance degradation was more significant at higher water contents in the electrode due to the consequential carbon corrosion, especially when higher voltages, i.e. 1.5Â V, were applied to the PEMFC single cell.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 43, Issue 32, 9 August 2018, Pages 15457-15465
Journal: International Journal of Hydrogen Energy - Volume 43, Issue 32, 9 August 2018, Pages 15457-15465
نویسندگان
Jeawoo Jung, Young-Hoon Chung, Hee-Young Park, Jonghee Han, Hyoung-Juhn Kim, Dirk Henkensmeier, Sung Jong Yoo, Jin Young Kim, So Young Lee, Kwang Ho Song, Hyun S. Park, Jong Hyun Jang,