锥管状LSGM电解质支撑的SOFC的研制

Fabrication of a cone-shaped LSGM electrolyte-supported SOFC

以甘氨酸-硝酸盐燃烧法合成的La0.9Sr0.1Ga0.8Mg0.2O2.85(LSGM)为原料,阿拉伯树胶为分散剂,采用注浆成型法制备长度约为10 mm、壁厚为0.2 mm、大口端直径约为8.5 mm的致密锥管状LSGM电解质管。以质量比为7∶3的Ni O-Gd0.1Ce0.9O1.95(GDC)、Sm0.5Sr0.5Co O3(SSC)-GDC分别为阳极、阴极材料,组装单体固体氧化物燃料电池(SOFC)。以加湿氢气(含3%H2O)为燃料、空气为氧化剂,电池在600℃时的最大输出功率密度约为87 m W/cm2。交流阻抗谱分析表明:影响电池性能的主要因素是电解质的欧姆电阻。

A cone-shaped La09 Sr0.1 Ga0.8 Mg0.2 O2.85 （ LSGM ） electrolyte cylinder with a thin wall was fabricated using slip casting technique. The electrolyte materials were prepared by using a glycine-nitrate process and were dispersed by gum arabic powers. The length of the cone-shaped cylinder was 10 mm,the thickness of the wall was 0.2 mm,the diameter of the larger open end was 8.5 mm. A single solid oxide fuel ceil（SOFC） was assembled by the cone-shaped electrolyte, the mass ratio of anode material NiO-Gd0.1 Ce0.9 O1.95 （GDC）and cathode material Sm0.5 Sr0.5 CoO3 （SSC）-GDC was 7：3. The maximum output power density of the cell was about 87 mW/cm2 at 600 ℃ when using humidified hydrogen（3% H2O contained）as fuel and ambient air as oxidant. The electro- chemical impedance spectroscopy（EIS） analysis showed that the dominant loss of the cell was the ohmic resistance of the electrolyte.