Evaluation and optimization of SrCo<sub>0.9sub>Ta<sub>0.1sub>O<sub>3鈭捨?/sub> perovskite as cathode for solid oxide fuel cells
- 作者：Qingjun Zhou<sup>asup><sup> ; sup><sup>zhouqingjun2004@yahoo.com.cnsup> ; Tong Wei<sup>asup> ; Yihua Shi<sup>asup> ; Songqing Guo<sup>asup> ; Yan Li<sup>asup> ; Jingxin Su<sup>asup> ; Huan Ren<sup>bsup> ; Yin Zhu<sup>asup>
- 关键词：Solid oxide fuel cells ; Electrical conductivity ; Thermal expansion coefficient ; Impedance spectroscopy
- 刊名：Current Applied Physics
- 出版年：2012
- 期刊代码：15_15671739
- 类别：ph
- 出版时间：July, 2012
- 卷：12
- 期：4
- 页码：1092-1095
- 文件大小：394 K
摘要
The SrCo<sub>0.9sub>Ta<sub>0.1sub>O<sub>3-未sub> (SCT) perovskite-type oxide is synthesized by the conventional solid state reaction method and examined as an alternative cathode for intermediate temperature solid oxide fuel cells (IT-SOFCs). The electrical conductivity of SCT sample reaches 250-152聽S聽cm<sup>鈭?sup> in the temperature range 600-800聽掳C. SCT exhibits good chemical compatibility with the intermediate-temperature electrolyte material Sm<sub>0.2sub>Ce<sub>0.8sub>O<sub>1.9sub> (SDC). The average thermal expansion coefficient of SCT is 21.4聽脳聽10<sup>鈭?sup>聽K<sup>鈭?sup>. The cathode area specific resistance (ASR) of SCT is only 0.095聽惟聽cm<sup>2sup> at 750聽掳C and it decreases to 0.068聽惟聽cm<sup>2sup> when SDC is added to form a SCT-SDC composite cathode. The results indicate that the SCT can be a promising alternative cathode material for IT-SOFCs.