制备了Sm0.5Sr0.5CoO3(SSC)-La0.8Sr0.2Ga0.8Mg0.15Co0.05O3(LSGMC5)中温固体氧化物燃料电池(ITSOFC)复合阴极,其中LSGMC5用柠檬酸盐法和固相合成法合成。含有柠檬酸盐法合成的LSGMC5粉末的SSC-LSGMC5电极的氧还原电催化性能明显优于含固相合成法合成的LSGMC5的电极。随着焙烧温度的升高,柠檬酸盐法合成的LSGMC5粉末的颗粒变大,并致密化,导致相应SSC-LSGMC5复合电极与LSGMC5电解质的结合程度减弱以及氧还原电催化性能变差。复合阴极中柠檬酸盐法合成的LSGMC5粉末的最佳焙烧温度约为1 000℃。Sm0.5Sr0.5CoO3(SSC)-La0.8Sr0.2Ga0.8Mg0.15Co0.05O3(LSGMC5) composite cathodes for intermediate temperature solid oxide fuel cell(ITSOFC) were prepared.LSGMC5 powders were synthesized by the citrate method and the solid-state reaction.The oxygen reduction electrocatalysis activity of SSC-LSGMC5 electrodes containing LSGMC5 prepared by the citrate method was much higher than that containing LSGMC5 prepared by the solid-state reaction.With the increasing of the sintering temperature,the size of the LSGMC5 particles prepared by the citrate method increased and the particles were densification.The contact between the corresponding SSC-LSGMC5 composite electrode and LSGMC5 electrolyte was weakened,and the oxygen reduction electrocatalysis activity was reduced.The optimum sintering temperature for LSGMC5 powders prepared by the citrate method in the composite cathode was about 1 000 ℃.福建省科技攻关计划重点项目(2003H046);; 留学回国人员基金资
