The (1-x)BaZr0.9Y0.1O3-δ(BZY)-xCe0.8Sm0.2O2-δ(SDC, x =0.1,0.3,0.5 and 0.7) composite electrolytes were prepared by combining a gel polymerization method with a ball milling. X-ray diffraction (XRD) patterns show the...The (1-x)BaZr0.9Y0.1O3-δ(BZY)-xCe0.8Sm0.2O2-δ(SDC, x =0.1,0.3,0.5 and 0.7) composite electrolytes were prepared by combining a gel polymerization method with a ball milling. X-ray diffraction (XRD) patterns show the mixture of BZY and SDC is only crystalline phase as the composite electrolyte. The relative density,grain size and total conductivity of composite electrolytes increase significantly with the increase of SDC content. The maximum conductivity of 0.1 BZY-0.9 SDC reaches 2×10^2 S·cm^-1 at 600 ℃ in wet air,which is close to the conductivity of SDC.展开更多
The Ba Ce0.8Y0.2O2.9-Ce0.85Sm0.15O1.925 composite electrolytes were prepared with Ba Ce0.8Y0.2O2.9(BCY) and Ce0.85Sm0.15O1.925(SDC). The SDC and BCY powders were mixed in the weight ratio of 95:5, 85:15, and 75:25, re...The Ba Ce0.8Y0.2O2.9-Ce0.85Sm0.15O1.925 composite electrolytes were prepared with Ba Ce0.8Y0.2O2.9(BCY) and Ce0.85Sm0.15O1.925(SDC). The SDC and BCY powders were mixed in the weight ratio of 95:5, 85:15, and 75:25, respectively(named as BS95, BS85, and BS75). Because of the composite effect between the SDC and BCY phases, the BS95 and BS85 exhibit improved conductivity compared with the pure SDC and BCY. The conductivity of BS95 is higher than that of BS85, indicating that the composite effect of BS95 is greater than that of BS85. Nevertheless, the composite effect in BS75 does not exist. Hence, we conclude that the composite effect in the BCY-SDC composites will decrease with the increase of the amount of BCY and even disappear when the amount of BCY exceeds a certain value. In our case, the optimum composition of the composite electrolyte is 95 wt% SDC and 5 wt% BCY. The BS95 has the highest conductivity(σ1t=0.07808 S cm-1, at 800 °C) and the fuel cell based on the BS95 shows the best performance(the maximum power density reaches as high as 526 mw cm-2 at 750 °C). The encouraging results suggest that the BCY-SDC composites are the very promising electrolyte materials for IT-SOFCs.展开更多
基金National Natural Science Foundation of China(No.51102216)Program for the Innovative Talents of Higher Learning Institutions of Shanxi Province+1 种基金Natural Science Foundation for Young Scientists of Shanxi Province(No.2012021021-1)Shanxi Scholarship Council of China(No.2012-071)
文摘The (1-x)BaZr0.9Y0.1O3-δ(BZY)-xCe0.8Sm0.2O2-δ(SDC, x =0.1,0.3,0.5 and 0.7) composite electrolytes were prepared by combining a gel polymerization method with a ball milling. X-ray diffraction (XRD) patterns show the mixture of BZY and SDC is only crystalline phase as the composite electrolyte. The relative density,grain size and total conductivity of composite electrolytes increase significantly with the increase of SDC content. The maximum conductivity of 0.1 BZY-0.9 SDC reaches 2×10^2 S·cm^-1 at 600 ℃ in wet air,which is close to the conductivity of SDC.
基金supported by the Natural Science Foundation of Liaoning Province(2013020010)
文摘The Ba Ce0.8Y0.2O2.9-Ce0.85Sm0.15O1.925 composite electrolytes were prepared with Ba Ce0.8Y0.2O2.9(BCY) and Ce0.85Sm0.15O1.925(SDC). The SDC and BCY powders were mixed in the weight ratio of 95:5, 85:15, and 75:25, respectively(named as BS95, BS85, and BS75). Because of the composite effect between the SDC and BCY phases, the BS95 and BS85 exhibit improved conductivity compared with the pure SDC and BCY. The conductivity of BS95 is higher than that of BS85, indicating that the composite effect of BS95 is greater than that of BS85. Nevertheless, the composite effect in BS75 does not exist. Hence, we conclude that the composite effect in the BCY-SDC composites will decrease with the increase of the amount of BCY and even disappear when the amount of BCY exceeds a certain value. In our case, the optimum composition of the composite electrolyte is 95 wt% SDC and 5 wt% BCY. The BS95 has the highest conductivity(σ1t=0.07808 S cm-1, at 800 °C) and the fuel cell based on the BS95 shows the best performance(the maximum power density reaches as high as 526 mw cm-2 at 750 °C). The encouraging results suggest that the BCY-SDC composites are the very promising electrolyte materials for IT-SOFCs.
