高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

复合阴极材料La1-xSrxCuO3-δ-SDC的制备及电学性能

郑敏章1, 刘晓梅1, 朱成军1, 徐丹1, 孙敬姝1, 苏文辉1,2   

    1. 吉林大学物理学院,
    2. 无机合成与制备化学国家重点实验室, 长春 130023
  • 收稿日期:2005-12-05 修回日期:1900-01-01 出版日期:2006-11-10 发布日期:2006-11-10
  • 通讯作者: 刘晓梅

Preparation and Electrical Properties of Composite Cathode Material La1-xSrxCuO3-δ-SDC for IT-SOFCs

ZHENG Min-Zhang1, LIU Xiao-Mei1, ZHU Cheng-Jun1, XU Dan1, SUN Jing-Shu1, SU Wen-Hui1,2
   

    1. Department of Physics,
    2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130023, China
  • Received:2005-12-05 Revised:1900-01-01 Online:2006-11-10 Published:2006-11-10

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摘要： 合成具有单相正交钙钛矿结构的La1-xSrxCuO3-δ(x=0.15, 0.2, 0.3, 0.4)系列样品, 碘量滴定法实验结果表明, 随着Sr掺入量的增加, Cu3+离子的含量逐渐增加. 电学性能研究结果表明, La0.7Sr0.3CuO3-δ电导率最高, 与La0.6Sr0.4CoO3-δ相比, La0.7Sr0.3CuO3-δ具有更好的电化学性能, 可作为一种新的中温固体氧化物燃料电池(IT-SOFC)阴极材料. 将La0.7Sr0.3CuO3-δ与不同质量比的中温电解质Ce0.85Sm0.15O2-δ(SDC) 固相混合, 制备复合阴极材料, 电化学性能测试结果表明, 掺入适量的SDC有利于降低La0.7Sr0.3CuO3-δ电极的极化, 获得性能更优越的IT-SOFC阴极材料, 提高在中温区单电池的输出功率.

关键词: TI-SOFC, 复合阴极, La1-xSrxCuO3-δ, SDC

Abstract: The cathode material La1-xSrxCuO3-δ(x=0.15, 0.2, 0.3, 0.4) was synthesized by a sol-gel method. X-ray diffraction reveals that it is a single phase of perovskite. The investigation of the electrical properties suggest that La0.7Sr0.3CuO3-δ has the highest electrical conductivity. La0.7Sr0.3CuO3-δ powder was mixed with different amount of SDC(Sm0.15Ce0.85O1.925) powder(5%—30%, mass fraction) as composite cathodes. Electrochemical properties of the composite cathodes were researched further. The investigation suggests the addition of appropriate amount SDC to La0.7Sr0.3CuO3-δ can improve the electrochemical properties, and a better cathodic performance can be obtained. Using La0.7Sr0.3CuO3-δ-SDC composite materials as a cathode based on SDC electrolyte higher current density and power density can be obtained at intermediate temperatures.

Key words: IT-SOFC, Composite cathode, La1-xSrxCuO3-δ, SDC

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