کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1460311 | 989604 | 2015 | 6 صفحه PDF | دانلود رایگان |
YSZ (Y2O3-stabilized ZrO2)/SDC (Sm-doped CeO2) bilayer electrolyte film was successfully fabricated on NiO/YSZ anode substrate using stepwise sintering processing by screen-printing technique. OCVs (open-circuit voltages) of 1.06 V, 1.05 V and 0.88 V were achieved at 750 °C for single cells with bilayer electrolyte of 12 μm-SDC/8 μm-YSZ, 12 μm-SDC/5 μm-YSZ, and 12 μm-SDC/2 μm-YSZ, respectively. Interdiffusion of ions at YSZ/SDC interface and formation of YSZ–SDC solid solution after sintering at 1400 °C for 2 h was investigated. The EDX result suggested that the region for the interdiffusion in a YSZ/SDC bilayer structure was 2.0 μm from the YSZ/SDC interface into the YSZ layer for Sm and Ce, and 0.5 μm into the SDC layer for Zr and Y. The YSZ–SDC solid solution exhibited a low electrical conductivity, which negatively affected the performance of single cell. After two thermal cycles, the maximum power density of the single cell exhibited a significant decrease. The destruction of YSZ/SDC bilayer electrolyte structure was not observed during the thermal cycles.
Journal: Ceramics International - Volume 41, Issue 3, Part B, April 2015, Pages 4410–4415