采用EDTA-柠檬酸联合络合法制备了SrCo1-xGaxO3-δ(x=0、0.1、0.2、0.3、0.4)系列阴极材料.通过X射线衍射、热膨胀测试、X射线光电子能谱和电化学阻抗谱等方法对试样进行分析,研究了Ga掺杂量对材料性能的影响.结果表明试样均为钙铁矿结构,随着Ga含量的增加,阴极粉体材料热膨胀系数、电导率和阴极材料表面的吸附氧逐渐减小.其中,SrCo0.8Ga0.2O3-δ的面电阻最小,600℃时为0.73 Ω·cm2,以其为阴极的单电池在650℃的工作温度下的最大输出功率达0.484 W/cm2.
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