The effect of calcium on the properties of SmBa<sub>1−xsub>Ca<sub>xsub>CoCuO<sub>5+δsub> as a cathode material for intermediate-temperature solid oxide fuel cells
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- 作者：Wenzhi Wang<sup>asup> ; Shengli Pang<sup>asup><sup> ; sup><sup>slpang@ujs.edu.cnsup><sup> ; sup><sup>bingkuai163@163.comsup> ; Yanjing Su<sup>asup> ; Xiangqian Shen<sup>asup><sup> ; sup><sup>shenxq@mail.ujs.edu.cnsup> ; Yonggang Wang<sup>asup> ; Kaijie Xu<sup>asup> ; Xiaoming Xi<sup>bsup> ; Jun Xiang<sup>csup>
- 关键词：Solid oxide fuel cells ; Cathode ; Perovskites ; Electrochemical performance
- 刊名：Journal of the European Ceramic Society
- 出版年：2017
- 出版时间：April 2017
- 年：2017
- 卷：37
- 期：4
- 页码：1557-1562
- 全文大小：2424 K
- 卷排序：37
文摘
The effect of calcium on the properties of SmBa1–xCaxCoCuO5+δ (x = 0.0–0.3) as a cathode material for intermediate-temperature solid oxide fuel cells (IT-SOFCs) is evaluated systematically. Samples exhibit a highly crystalline double perovskite phase, and their cell volumes decrease as x is changed from 0.0 to 0.3. The oxygen content and average thermal expansion coefficient (TEC) of SmBa1–xCaxCoCuO5+δ decreases as the calcium content increased. An average TEC of as low as 15.3 × 10−6 °C−1 is obtained for SmBa0.7Ca0.3CoCuO5+δ. The area specific resistances at 700 °C decrease by approximately 50% when the calcium content is increased from x = 0.0 (0.173 Ω cm2) to x = 0.3 (0.086 Ω cm2). The maximum power densities of SmBa1−xCaxCoCuO5+δ-based single cells at 800 °C increase from 635 mW cm−2 (x = 0.0) to 939 mW cm−2 (x = 0.3).