کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5150445 1498241 2017 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
CGO as a barrier layer between LSCF electrodes and YSZ electrolyte fabricated by spray pyrolysis for solid oxide fuel cells
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
CGO as a barrier layer between LSCF electrodes and YSZ electrolyte fabricated by spray pyrolysis for solid oxide fuel cells
چکیده انگلیسی
Perovskite La0.6Sr0.4Co0.2Fe0.8O3 − δ (LSCF) is often used as a cathode material for solid oxide fuel cells (SOFC) due to high mixed ionic and electronic conductivity and good catalytic activity. Unfortunately, sintering of the LSCF cathode together with the yttria stabilized zirconia (YSZ) electrolyte, leads to formation of the La2Zr2O7 and SrZrO3 phases in the interface. These phases increase the resistance of the cell. To avoid creation of the undesirable phases, diffusion barrier layers are often used. In this work 200 nm thick cerium-gadolinium oxide (CGO) layer deposited by spray pyrolysis is used as a diffusion barrier. The impact of sintering temperature on the effectiveness of diffusion barrier was examined. For optimized sintering temperature of 900 °C, the CGO barrier layer leads to lowering polarization loses of almost two orders of magnitude from 477 mΩ cm2 (when CGO is not used) to 7 mΩ cm2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 302, April 2017, Pages 113-117
نویسندگان
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