Preparation and characterization of Ce_(0.8)La_(0.2–x)Y_xO_(1.9) as electrolyte for solid oxide fuel cells |
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引用本文: | 田长安,季必发,谢劲松,鲍巍涛,刘可,程继海,尹奇异.Preparation and characterization of Ce_(0.8)La_(0.2–x)Y_xO_(1.9) as electrolyte for solid oxide fuel cells[J].中国稀土学报(英文版),2014,32(12):1162-1169. |
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作者姓名: | 田长安 季必发 谢劲松 鲍巍涛 刘可 程继海 尹奇异 |
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基金项目: | Project supported by National Natural Science Foundation of China(51102073);the research fund of Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province(AE201361);Natural Science Foundation of Anhui Province of China(10040606Q53,1308085QB35);the Outstanding Young Talent Project in Colleges and Universities of Anhui Province |
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摘 要: | In this study, ultrafine Ce0.8La0.2–x Y x O1.9(for x=0, 0.05, 0.10, 0.15, 0.20) powders were successfully prepared by the sol-gel method.The samples were characterized by fourier transform infrared(FTIR), thermogravimetric and differential scanning calorimetry(TG-DSC), X-ray diffraction(XRD), scanning electron microscopy(SEM), AC impedance and thermal expansion measurements.Experimental results indicated that highly phase-pure cubic fluorite electrolyte Ce0.8La0.2–x Y x O1.9 powders were obtained after calcining at 600 °C.The as-synthesized powders exhibited high sintering activity, the Ce0.8La0.2–x Y x O1.9 series electrolytes which have higher relative densities over 96% could be obtained after sintered at 1400 °C for 4 h.Ce0.8La0.15Y0.05O1.9 electrolyte sintered at 1400 °C for 4 h exhibited higher oxide ionic conductivity(σ800 oC=0.057 S/cm), lower electrical activation energy(E a=0.87 e V) and moderate thermal expansion coefficient(TEC=15.5×10-6 K-1, temperature range 25–800 °C).
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关 键 词: | 固体氧化物燃料电池 电解质 制备 表征 差示扫描量热法 扫描电子显微镜 TG-DSC 烧结活性 |
收稿时间: | 26 March 2014 |
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