柠檬酸-硝酸盐法制备中温SOFC材料

Study on the Preparation of IT-SOFC Electrolyte and Electrode Material by Citric Acid-nitrate Method

采用燃烧合成的方法—柠檬酸-硝酸盐法合成中温固体氧化物燃料电池的电解质及电极材料的初始粉末.电池的电解质材料是Ce0.8Gd0.2O1.95(GDC),阴极材料是La0.7Sr0.3Co0.3Fe0.7O3(LSCF),还原前的阳极材料是掺Ce0.8Sm0.2O1.9(SDC)的NiO.借助XRD和TG-DTA等测试手段对材料的晶体结构和反应过程进行了分析.实验结果表明,柠檬酸-硝酸盐燃烧合成法能制备纳米级的电解质及电极材料的初始粉末,燃烧合成中pH值的大小和合成后的烧结温度能很大的影响晶粒的成长和相的生成.

Electrode and electrolyte material fitting to IT-SOFC were synthesized by the combination of sol gel and citric acid-nitrate low temperature self-propagating combustion method. Ce0.9Gd0. 1 O1.95 （GDC）and La0.7 Sro 3 Co0. 3 Fe0. 703 （LSCF） are used as electrolyte and cathode material respectively, while NiO-Ce0.8 Sm0.2 O1.9 （NiO-SDC） is a perfect anode precursor material. The crystal structure and reaction progress were investigated with XRD and TG-DTA. The results show that the electrode and electrolyte material with the diameter of tens of nm can be synthesized using sol gel and citric acid-nitrate low temperature self-propagating combustion method. Crystal growth and crystal structure depends strongly on pH value and the sinter temperature.