摘要
La1-xSrxCr1-yMnyO3-δ(LSCM) anode materials were synthesized by glycine nitrate process(GNP). Thermo-gravimetric analysis(TGA) and differential scanning calorimetric(DSC) methods were adopted to investigate the reaction process of LSCM anode materials. The oxides prepared were characterized via X-ray diffraction(XRD),scanning electron microscope and energy dispersive spectroscopy(SEM-EDS),direct current four-electrode and temperature process reduction(TPR) techniques. XRD patterns indicate that perovskite phase created after the precursor was sintered at 1 000 ℃ for 5 h,and single perovskite-type oxides formed after the precursor were sintered at 1 200 ℃ for 5 h. The powders are micrometer size after sintering at 1 000 ℃ and 1 200 ℃,respectively. The conductivities of LSCM samples increase linearly with increasing the temperature from 250 ℃ to 850 ℃ in air and the maximum value is 32 S/cm for La0.7Sr0.3Cr0.5Mn0.5O3-δ. But it is lower about two orders of magnitude in pure hydrogen or methane than that of the same sample in the air. TPR result indicates that LSCM offers excellently catalytic performance.
La1-xSrxCr1-yMnyO3-δ(LSCM) anode materials were synthesized by glycine nitrate process(GNP). Thermo-gravimetric analysis(TGA) and differential scanning calorimetric(DSC) methods were adopted to investigate the reaction process of LSCM anode materials. The oxides prepared were characterized via X-ray diffraction(XRD), scanning electron microscope and energy dispersive spectroscopy(SEM-EDS), direct current four-electrode and temperature process reduction(TPR) techniques. XRD patterns indicate that perovskite phase created after the precursor was sintered at 1 000℃ for 5 h, and single perovskite-type oxides formed after the precursor were sintered at 1 200 ~C for 5 h. The powders are micrometer size after sintering at 1 000 ℃ and 1 200℃, respectively. The conductivities of LSCM samples increase linearly with increasing the temperature from 250 ℃ to 850 ℃ in air and the maximum value is 32 S/cm for La1-xSrxCr1-yMnyO3-δ. But it is lower about two orders of magnitude in pure hydrogen or methane than that of the same sample in the air. TPR result indicates that LSCM offers excellently catalytic performance.
出处
《中国有色金属学会会刊:英文版》
CSCD
2007年第A02期998-1001,共4页
Transactions of Nonferrous Metals Society of China
基金
Project(50204007) supported by the National Natural Science Foundation of China
Project(2005PY01-33) supported by the Talent Foundation of Yunnan Province, China
关键词
常温固体氧化物燃料电池
阳极材料
甘氨酸
硝化
La1-xSrxCr1-yMnyO3-δ
anode materials
glycine nitrate process
intermediate temperature solid oxide fuel cells
properties