摘要
为探索适于中温条件下使用的固体氧化物燃料电池的阴极材料,用甘氨酸-硝酸盐法(GNP法)制备了Gd0.8Sr0.2CoO3(GSC)阴极粉体,用X-ray衍射考察了GSC的成相温度.采用丝网印刷法将GSC沉积在(Sm2O3)0.2(CeO2)0.8(SDC)圆片上,制成对称阴极,在不同温度下烧结.用交流阻抗谱从500℃到750℃测量了GSC阴极和SDC电解质之间的界面电阻.结果表明,用甘氨酸-硝酸盐法制备的GSC粉体的成相温度比传统固相法降低了400℃～500℃;700℃时,GSC阴极的界面电阻仅为0.26 Ω·cm2.
Gd0.8Sr0.2CoO3 （GSC） were prepared by the glycine-nitrate process （GNP） for intermediate temperature solid oxide fuel cell （ITSOFC）. Symmetrical electrodes of GSC were obtained on （Sm2O3）0.2（CEO2）0.8（SDC） by screen-printing and sintered at temperature from 900℃ to 1050℃. The electrochemical properties of the interfaces between GSC cathodes and SDC electrolytes were investigated using AC impedance spectroscopy. The results show that perovskite was formed at 800℃, 400℃ lower than that prepared by solid-state reaction. The interfacial resistance of GSC cathode is only 0.26 Ωcm^2 at 700℃. The results indicate GSC is an ideal candidate cathode for ITSOFC, due to its high catalytic activity for oxygen reduction.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2005年第10期1650-1652,共3页
Rare Metal Materials and Engineering
基金
国家"863"项目(2001AA323090)
国家自然科学基金(50372066)资助
