کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7746424 | 1498280 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Delamination-resistant bi-layer electrolyte for anode-supported solid oxide fuel cells
ترجمه فارسی عنوان
الکترولیت دو لایه مقاوم در برابر خراشیدگی برای سلول های سوخت اکسید جامد پشتیبانی شده از آند
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کلمات کلیدی
سلول های سوختی اکسید جامد، دو لایه، عدم تعادل سلولی، لایه لایه شدگی، تنزل،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
One of the critical fuel cell degradation phenomena is 'cell imbalance' in a series-connected stack, which can cause abnormal operation under a negative cell voltage and consequently rapid degradation by anode interface delamination. In a previous study, the effect of electrolyte composition on the electrochemical degradation of solid oxide fuel cell (SOFC) was investigated, and it was observed that a small amount of ceria (an electronic conducting material) prevents anode delamination under abnormal (negative voltage) operation. However, the open circuit voltage (OCV) was lowered as a result of reduction of ceria. In the present study, bi-layer, YSZ (8Â mol % yttria doped zirconia, a predominantly ionic conductor) at the cathode side and 8CYSZ (8Â mol % ceria doped YSZ, a mixed ionic-electronic conductor) at the anode side were fabricated for anode-supported cells with a Pt probe embedded in each layer to estimate the internal oxygen chemical potential and tested under a negative voltage. The results indicated that the OCV was close to the theoretical value (similar to that of a YSZ single layer cell) and no delamination was observed under negative voltage operation (similar to the case of an 8CYSZ single-layer cell). Therefore, the bi-layer-structured electrolyte (with locally increased electronic conduction at the anode side) is effective in preventing anode/electrolyte delamination as well as maintaining open circuit voltage.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 262, 1 September 2014, Pages 438-443
Journal: Solid State Ionics - Volume 262, 1 September 2014, Pages 438-443
نویسندگان
Mi Young Park, Yeon-Gil Jung, Hyung-Tae Lim,