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

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Title:	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
Authors:	任裕靖;Ren,Yu-jing
Contributors:	材料科學與工程研究所
Keywords:	導電率;化學穩定性;電解質;固態氧化物燃料電池;銦摻雜;SOFC;sinterability;conductivity;chemical stability;electrolyte;Indium doping
Date:	2014-07-21
Issue Date:	2014-10-15 15:06:08 (UTC+8)
Publisher:	國立中央大學
Abstract:	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。;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
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