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Ba掺杂SrTiO3 SOFC阳极材料的制备与电性能分析

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Abstract:

采用高温固相法合成BaxSr1-xTiO3-δ(x=0.1~0.3,摩尔分数)粉体,制备固体氧化物燃料电池(solidoxidefuelcell,SOFC)阳极材料,并对材料进行X射线衍射、扫描电子显微镜分析及相对致密度、高温电导的测量。Ba的掺入增大材料的晶胞参数,但是阻碍材料的致密化,材料的电子电导率和离子电导率都随Ba掺量的增加而提高,900℃时,Ba0.3Sr0.7TiO3-δ离子电导率为5.81×10-3S/cm。Ba0.3Sr0.7TiO3-δ是一类较好的燃料电池阳极掺杂母体材料。从缺陷化学和晶体几何结构的角度分析掺杂元素Ba的作用机理。

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