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Acta Chimica Sinica ›› 2006, Vol. 64 ›› Issue (5): 449-452. Previous Articles    

Reports

Pr1－xSrxAlO3－δ的合成及其作为固体氧化物燃料电池阴极的性能研究

徐加焕1，黄喜强1，吕喆1，张耀辉1，葛晓东1，苏文辉*,1,2,3   

  1. (1哈尔滨工业大学凝聚态科学与技术研究中心 哈尔滨 150001)
    (2吉林大学凝聚态物理系 吉林 130022)
    (3中国科学院国际材料物理中心 沈阳 110015)
  • 投稿日期:2005-06-24 修回日期:2005-11-03 发布日期:2006-03-15
  • 通讯作者: 苏文辉

Synthesis and Properties of Pr1－xSrxAlO3－δ as Cathode ofSolid Oxide Fuel Cells

XU Jia-Huan1, HUANG Xi-Qiang1, LÜ Zhe1, ZHANG Yao-Hui1, GE Xiao-Dong1, SU Wen-Hui*,1,2,3   

  1. (1 Center for Condensed Matter Science and Technology, Harbin Institute of Technology, Harbin 150001)
    (2 Department of Condensed Matter Physics, Jilin University, Changchun 130022)
    (3 International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110015)
  • Received:2005-06-24 Revised:2005-11-03 Published:2006-03-15
  • Contact: SU Wen-Hui

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Compounds Pr1－xSrxAlO3－δ (x＝0, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5) were successfully synthesized by solid state reaction method and XRD results showed that the solubility of Sr2＋ on A site was about 20%. The electrical conductivity measured by alternating current (AC) impedance was increased with increasing Sr content. The sample with x＝0.2 exhibited the best performance on the conductivity. At 850 ℃, the value was 0.02 S/cm. Results of ionic transfer number measurement indicated that the Pr1－xSrxAlO3－δ samples were the mixed ionic-electronic conductors. Both cathode polarization and AC impedance results showed that Sr2＋doping greatly improved the cathode performance. A short-term stability test of the cathode was done and the result showed that there was a slight decrease of the cathode over-potential during the test.

Key words: cathode, mixed conductor, solid oxide fuel cells