کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1284600 1498033 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Performance of a commercial cathode-supported solid oxide fuel cells prepared by single-step infiltration of an ion-conducting electrocatalyst
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Performance of a commercial cathode-supported solid oxide fuel cells prepared by single-step infiltration of an ion-conducting electrocatalyst
چکیده انگلیسی

Infiltration of fine-grained electrocatalyst particles into ceramic porous scaffolds is a very effective way to improve electrode performance for low-to-intermediate temperature solid oxide fuel cells (SOFCs). Conventionally, fine particles of an electronic or mixed electronic and oxide-ion conducting material are impregnated into an ion conducting porous scaffold. However, this approach usually requires higher infiltrant-loading, therefore tedious repetitive infiltration/drying and calcinations steps, in order to form percolated electron conducting network for effective current collection. In this study, we present an alternative single-step route involving infiltration of an ion conducting Sm-doped CeO2 (SDC) into an electron conducting cathode porous scaffold as well as anode of a commercial cathode-supported SOFC. A comparative study shows that the cathode polarization can be reduced by a factor of five to thirteen from 700 to 1000 °C by the infiltrated SDC. The single-cell performance exhibits a performance improvement by a factor of three from 700 to 800 °C. Stability tests within a limited time frame and low current-density show a relatively flat performance for SDC-infiltrated cell and “break-in” behavior for the baseline cell, suggesting electrolyte/cathode interface being activated by the infiltrated electrocatalyst.


► Simplified single-step infiltration method.
► Infiltration of ion-conducting electrocatalyst (Sm-doped CeO2) into both cathode and anode.
► A factor of thirteen (highest) reduction in cathode polarization demonstrated by the infiltrated ion conducting electrocatalyst.
► A factor of three in single cell performance enhancement demonstrated by the infiltrated ion conducting electrocatalyst.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 199, 1 February 2012, Pages 132–137
نویسندگان
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