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Ni-CGO阳极支撑ScSZ/CGO复合电解质电池的制备及性能

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Abstract:

用柠檬酸溶胶–凝胶法合成了Ce0.85Gd0.15O2–δ(CGO),用共沉淀法合成了掺摩尔分数为11%Sc2O3稳定的ZrO2(scandiumoxide-stabilizedzirconia,ScSZ)电解质材料。通过X射线衍射和透射电镜对电解质材料的物相、形貌和成分进行表征。结果表明CGO和ScSZ在各自的煅烧温度下均形成了单一的立方萤石结构晶态;ScSZ颗粒的粒径约为20nm。用共压法分别制备了以NiO–CGO阳极支撑的CGO单层电解质和ScSZ/CGO复合电解质的基体,并在基体上涂覆阴极制作单电池。在650~800℃范围内测试单电池的电性能。结果表明ScSZ/CGO双层电解质电池的开路电压和最大功率密度均高于单层CGO电解质电池;在800℃电流密度和功率密度达到最大值,分别为677.5mA/cm2和197.3mW/cm2。说明ScSZ/CGO双层电解质有效地提高了电池的性能。

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