摘要
用金属硝酸盐,通过柠檬酸法合成了中温固体氧化物燃料电池阴极材料La0 7Sr0 3-xCaxCo0 9Fe0 1O3-δ(LSCCF)粉末。用热重差热研究了LSCCF的形成过程。XRD测试表明:前驱体800℃处理3h,已形成六方钙钛矿结构。样品的电导率随着烧结温度的升高和Ca2+含量的减少而变大,在500～800℃范围内,大于500S/cm,高于固相合成法的电导率最大值100S/cm。XRD和SEM测试表明:样品与电解质Ce0 8Sm0 2O2的化学相容性好。
<Abstrcat>The powders of La_(0.7)Sr_(0.3-x)Ca_xCo_(0.9)Fe_(0.1)O_(3-δ)(LSCCF) as cathode materials for intermediate temperature solid oxide fuel cells were synthesized by using a citrate method with metal nitrate. The formation process was investigated with TG-DSC. XRD test showed that a hexagonal perovskite phase was formed after the precursor treated at 800 ℃ for 3 h. The electrical (conductivity) of sample increased with the increasing of sintering temperature and decreasing of the content of Ca^(2+), higher than 500 S/cm and bigger than maximum 100 S/cm from conventional sintering method in the range of 500～800 ℃. XRD and SEM test showed that the samples had good chemical compatibility with the electrolyte Ce_(0.8)Sm_(0.2)O_2.
出处
《电池》
CAS
CSCD
北大核心
2005年第3期185-187,共3页
Battery Bimonthly
基金
国家"863"计划项目(2001AA515080)
瑞典亚洲合作计划项目(DNR6964)
