中温固体氧化物燃料电池阴极材料La_(0.7)Sr_(0.2)Co_(0.1)CuO_(3-σ)的制备与表征

用柠檬酸络合法制备超细的钙钛矿型结构的固体氧化物燃料电池阴极材料La0.7Sr0.2Co0.1CuO3-σ(LSCC)。选用合适的反应条件和煅烧温度制得所需要的材料后,用DSC-TG、XRD、SEM等对粉体进行物相测定和形貌观察;选用不同温度煅烧前驱体,得到不同比表面积的粉体材料,通过半干法工艺成型LSCC阴极材料并测试它在不同温度条件下的电性能。结果表明,溶胶凝胶-高温自燃烧法能制备出超细纯相的LSCC阴极材料,且该阴极材料在中温条件下使用具有良好的导电性能(不低于150S/cm)和输出功率(0.85W/cm2)和较低的活化能(112.1kJ/mol)。

Synthesis and Characterization of La_(0.7)Sr_(0.2)Co_(0.1)CuO_(3-σ) Cathode Materials for IT-SOFC

Perovskite-type ultrafine La_(0.7)Sr_(0.2)Co_(0.1)CuO_(3-σ) powders used as cathode materials for intermediate temperature solid oxide fuel cell (IT-SOFC) were directly synthesized by a citrate process and the microstructure was observed with scanning electron microscopy (SEM) and analyzed by DSC-TG、XRD. Baking the precursor at different temperature in order to get the powder with different specific surface area. Using semi-dry method to sharp the LSCC and test electrical conductivity in intermediate temperature. The results indicate that high purity ultrafine LSCC powder can be synthesis by citrate process and self-combusting method and it shows good electrical conductivity(more than 150 S/cm), output power(0.85 W/cm~2 and activation energy(112.1 kJ/mol)in suitably temperature.