Ba0.8Sr0.2Ce0.8-x-yZryInxY0.2O3-δ(x=0.05,0.1 y=0,0.1)固態氧化物燃料電池電解質材料燒 結能力、微結構與其導電性質之研究

The study of sintering ability, microstructure, and conductivity of Ba0.8Sr0.2Ce0.8-xyZryInxY0.2O3- δ(x=0.05,0.1 y=0,0.1) Solid oxide fuel cell electrolyte material

任裕靖(Yu-jing Ren)

指導教授 ： 鄭憲清

國立中央大學/工學院/材料科學與工程研究所/碩士(2014年)

摘要

本研究成功利用固相反應法製備Ba0.8Sr0.2Ce0.8-x-yZryInxY0.2O3-δ(x=0.05，
0.1 y=0，0.1)粉體，由於BaCeO3 具有高質子導電率，釔及鍶之摻雜可以增
加導電率，鋯之摻雜可以增加化學穩定性，銦摻雜可以降低燒結溫度，非常
適合應用於P-SOFC 之電解質材料。銦之摻雜對於燒結能力有明顯的提升，
摻雜0.05 %收縮率增加了7 %，而且燒結溫度可以由1600 °C 下降至1450
°C，經由SEM 觀察其破斷面非常緻密。而導電率在800 °C 氫氣氣氛下可
達0.011 S/cm，達到目前商用的需求(0.01 S/cm)。並利用噴霧塗佈法來製備
陽極支撐型半電池，將含有NiO 及造孔劑之Ba0.8Sr0.2Ce0.6Zr0.2Y0.2O3-δ 乾壓
成形，噴上電解質，共燒溫度為1450 °C，再塗佈白金作為陰極，進行電池
功率之量測。

關鍵字

導電率 ； 化學穩定性 ； 電解質 ； 固態氧化物燃料電池 ； 銦摻雜

並列摘要

Ba0.8Sr0.2Ce0.6Zr0.2InxY0.2-xO3-δ(0.0≦x≦0.2) proton-conducting oxides
had been successfully prepared using a solid state reaction method. In this study,
the effect of indium contents on the microstructures, chemical stability, electrical
conductivity, and sintering ability of these Ba0.8Sr0.2Ce0.6Zr0.2InxY0.2-xO3-δ oxides
were systemically studied by using X-ray diffraction (XRD), scanning electron
microscopy, and two point probe conductivity analysis. The XRD results showed
that no second phase could be resolved from the Ba0.8Sr0.2Ce0.6Zr0.2InxY0.2-xO3-δ
oxides sintered at 1450 °C for 4 hr. Meanwhile, the SEM observation shows a
dense surface morphology for these oxides after sintering at 1450 °C for 4 hr. The
optimum conductivity can reach to 0.011 S/cm at 800 °C occurs at the oxide
composition of Ba0.8Sr0.2Ce0.75In0.05Y0.2O3-δ. In addition, the chemical stability to
resist CO2 at 600 °C can be effectively improved by doping more than 0.1 at%
indium. Therefore, the Ba0.8Sr0.2Ce0.75In0.05Y0.2O3-δ ceramic is suggested to be a
potential electrolyte material for P-SOFC applications. In addition, the anodesupported
half-cell was prepared by spray coating the Ba0.8Sr0.2Ce0.75In0.05Y0.2O3-
δ electrolyte slurry on the anode pellet , and sintered at 1450 °C for 4 hour. Then
the sintered half-cell was coated with Pt paste as cathode for I-V curve testing.
Keywords: SOFC, sinterability, conductivity, chemical stability, electrolyte,
IndiumBa0.8Sr0.2Ce0.6Zr0.2InxY0.2-xO3-δ(0.0≦x≦0.2) proton-conducting oxides
had been successfully prepared using a solid state reaction method. In this study,
the effect of indium contents on the microstructures, chemical stability, electrical
conductivity, and sintering ability of these Ba0.8Sr0.2Ce0.6Zr0.2InxY0.2-xO3-δ oxides
were systemically studied by using X-ray diffraction (XRD), scanning electron
microscopy, and two point probe conductivity analysis. The XRD results showed
that no second phase could be resolved from the Ba0.8Sr0.2Ce0.6Zr0.2InxY0.2-xO3-δ
oxides sintered at 1450 °C for 4 hr. Meanwhile, the SEM observation shows a
dense surface morphology for these oxides after sintering at 1450 °C for 4 hr. The
optimum conductivity can reach to 0.011 S/cm at 800 °C occurs at the oxide
composition of Ba0.8Sr0.2Ce0.75In0.05Y0.2O3-δ. In addition, the chemical stability to
resist CO2 at 600 °C can be effectively improved by doping more than 0.1 at%
indium. Therefore, the Ba0.8Sr0.2Ce0.75In0.05Y0.2O3-δ ceramic is suggested to be a
potential electrolyte material for P-SOFC applications. In addition, the anodesupported
half-cell was prepared by spray coating the Ba0.8Sr0.2Ce0.75In0.05Y0.2O3-
δ electrolyte slurry on the anode pellet , and sintered at 1450 °C for 4 hour. Then
the sintered half-cell was coated with Pt paste as cathode for I-V curve testing.
Keywords: SOFC, sinterability, conductivity, chemical stability, electrolyte,
Indium

並列關鍵字

SOFC ； sinterability ； conductivity ； chemical stability ； electrolyte ； Indium doping

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