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IT-SOFC复合阳极材料CDC-LSCMCo的制备及性能
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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)


Preparation and Properties of CDC-LSCMCo Composite Anodes for IT-SOFC
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    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5 h能够得到单一萤石-钙钛矿结构且粒度较小(1 μm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0.7 S·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。

    Abstract:

    IT-SOFC composite anode material Ce0.8Ca0.2O2-La0.7Sr0.3Cr0.5Mn0.5-xCoxO3-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 oC for 5 h. Conductivity testing show that the conductivity of CDC-LSCMCo increases with the Co content increasing when the temperature is above 750 oC; while at 800 oC 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.

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张徐民,陈秀华,项金钟,马文会,于 洁. IT-SOFC复合阳极材料CDC-LSCMCo的制备及性能[J].稀有金属材料与工程,2010,39(1):177~181.[Zhang Xumin, Chen Xiuhua, Xiang Jinzhong, Ma Wenhui, Yu Jie. Preparation and Properties of CDC-LSCMCo Composite Anodes for IT-SOFC[J]. Rare Metal Materials and Engineering,2010,39(1):177~181.]
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  • 收稿日期:2009-01-15
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