化学学报 ›› 2004, Vol. 62 ›› Issue (20): 1993-1997. 上一篇    下一篇

研究论文

中温固体氧化物燃料电池复合阴极材料LSM-CBO的制备及性能研究

赵辉, 霍丽华, 孙丽萍, 高山, 于丽君, 赵经贵   

  1. 黑龙江大学化学化工学院, 哈尔滨, 150080
  • 收稿日期:2004-02-09 修回日期:2004-04-19 出版日期:2004-10-28 发布日期:2014-02-17
  • 通讯作者: 赵辉,E-mail:zhaohui98@yahoo.com E-mail:zhaohui98@yahoo.com
  • 基金资助:
    黑龙江省自然科学基金重点项目(ZJG03-4)及黑龙江省海外学人基金(1054HQ003)资助项目.

Preparation and Electrochemical Properties of LSM-CBO Composite Cathodes for ITSOFC

ZHAO Hui, HUO Li-Hua, SUN Li-Ping, GAO Shan, YU Li-Jun, ZHAO Jing-Gui   

  1. College of Chemistry and Chemical Technology, Heilongjiang University, Harbin 150080
  • Received:2004-02-09 Revised:2004-04-19 Online:2004-10-28 Published:2014-02-17

采用柠檬酸络合法为中温固体氧化物燃料电池制备了La0.85Sr0.15MnO3-Ce0.7Bi0.3O2(LSM-CBO)复合阴极材料,利用XRD和SEM对材料进行了表征.结果表明该复合材料在1000℃以内烧结时不发生反应,且在900℃烧结2 h条件下,电极与Ce0.9Gd0.1O2(CGO)电解质可形成良好的接触.复合电极在700℃,0.6V阴极极化电势下处理96h,也没有发现可检测到的其它物相.我们同时使用交流复阻抗谱和直流极化技术研究了电极的电化学性能,结果表明氧在电极表面的吸附是阴极反应的速率控制步骤,且随着CBO含量的增加电极极化电阻减小,最小值达到2.23Ω·cm2,出现在掺杂30wt%CBO的LSM复合电极中.

关键词: 中温氧化物燃料电池, 复合阴极材料, LSM-CBO, 电极反应

La0.85Sr0.15MnO3-Ce0.7Bi0.3O2(LSM-CBO) composite electrode for ITSOFC (intermediate temperature solid oxide fuel cell) has been prepared by citrate-gel method. XRD results indicate that LSM has no reaction with CBO at 1000℃ in air. SEM results show that the composite electrode formed good contact with Ce0.9Gd0.1O2(CGO) electrolyte after sintered at 900℃ for 2 h. The composite electrode remained unchanged even after heat treatment at 700℃ and 0.6 V cathode potential for 96 h. AC impedance spectroscopy and DC polarization measurements were used to study the composite electrode performances. The polarization resistance decreased with increasing CBO contents. The optimum value of 30 wt% CBO in LSM resulted in 2.23 Ω·cm2 area specific resistivity (ASR) at (700℃) in air, which indicates that the LSM-CBO composite electrode is a promising cathode material in ITSOFC.

Key words: intermediate temperature solid oxide fuel cell(ITSOFC), composite cathode material, LSM-CBO, electrode reaction