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OALib Journal期刊
ISSN: 2333-9721
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la0.7sr0.3feo3-sm0.2ce0.8o3复合阴极制备及性能研究
Abstract:
？采用固相反应法(ssr)和硝酸盐-甘氨酸燃烧法(gnp)合成la0.7sr0.3feo3(lsf)粉体,用于制备中温固体氧化物燃料电池的复合阴极lsf-sm0.2ce0.8o2(sdc).用交流阻抗谱研究复合阴极的组成、烧结温度、起始粉体性质等因素对电极界面比电阻的影响.结果表明,在lsf中加入适当比例的sdc可明显提高电极的性能.当sdc的加入量达到其渗流阀值(~50%,质量分数)时,在700℃复合阴极的界面比阻抗约为0.2ω？cm2,大约为纯lsf的十分之一.电极性能的明显提高的原因是电极离子电导率的提高、ceo2的本征催化性能以及电极三相线密度的增大.
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