IT-SOFC复合阳极材料CDC-LSCMCo的制备及性能  

Preparation and Properties of CDC-LSCMCo Composite Anodes for IT-SOFC

作　　者：张徐民[1] 陈秀华[1] 项金钟[1] 马文会[2] 于洁[2] 

机构地区：[1]云南大学,云南昆明650091 [2]昆明理工大学真空冶金国家工程实验室,云南昆明650093

出　　处：《稀有金属材料与工程》2010年第1期177-181,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金项目(50204007);云南省中青年学术带头人后备人才项目(2005PY01-33);教育部新世纪优秀人才支持计划(NCET-07-0387)

摘　　要：采用甘氨酸-硝酸盐法(GNP法)一次性合成固体氧化物燃料电池复合阳极材料Ce0.8Ca0.2O2-La0.7Sr0.3Cr0.5Mn0.5-xCoxO3-δ(CDC-LSCMCo)。XRD、SEM和EDS分析结果表明:1350℃下烧结5h能够得到单一萤石-钙钛矿结构且粒度较小(1μm左右)的复合阳极粉体。电导率的测试研究发现,温度大于750℃时,电导率随Co含量的增加而增大。800℃时,CDC-LSCMCo0.15分别在空气与氢气气氛下的电导率分别为10.5和0.7S·cm-1。SEM和XRD分析表明:CDC-LSCMCo与La0.9Sr0.1Ga0.8Mg0.2O3-δ电解质材料有很好的热与化学相容性,是一种应用前景良好的IT-SOFC阳极材料。IT-SOFC composite anode materialCe0.8Ca0.2O2-La0.7Sr0.3Cr0.5M0.5-xCocO3-δ（CDC-LSCMCo） was synthesized in one-step by glycine nitrate process （GNP）. The results from X-ray diffraction （XRD）, scanning electron microscopy （SEM） and energy dispersive X-ray spectroscopy （EDS） indicate that the composite anode powder with single fluorite-perovskite phase and small grain size （about 1 μm） was obtained after sintering the predecessor at 1350 ℃ for 5 h. Conductivity testing show that the conductivity of CDC-LSCMCo increases with the Co content increasing when the temperature is above 750 ℃; while at 800 ℃ the conductivity is 10.5 s.cm^-1 and 0.7 S·cm^-1 in air and H2 atmosphere, respectively. Good chemical-thermal compatibility between CDC-LSCMCo and La0.9Sr0.1Ga0.8Mg0.2O3-δ （LSGM） was confirmed via XRD and SEM. CDC-LSCMCo is a promising anode material of SOFC for its excellent properties at intermediate temperature.

关 键 词：GNP法 CDC-LSCMCo 复合阳极 电导率 IT-SOFC 

分 类 号：TM911.4[电气工程—电力电子与电力传动]