Performance of Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3−δ-CGO-Ag cathode for IT-SOFCs

详细信息	查看全文 | 推荐本文 |

• 作者：Yuansong Wang ; Shaorong Wang ; Zhenrong Wang ; Tinglian Wen ; Zhaoyin Wen
• 关键词：BSCF ; Cathode ; Thermal expansion ; Electrical conductivity ; ASR
• 刊名：Journal of Alloys and Compounds
• 出版年：2007
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：31 January 2007
• 卷：428
• 期：1-2
• 页码：286-289
• 文件大小：555 K

摘要

Single phase Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3−δ (BSCF) was synthesized successfully at 1000 °C by solid reaction method. The dependence of thermal expansion and electrical conductivity on temperatures were studied. Electrochemical properties of pure BSCF cathode and BSCF + CGO (20 mol%Gd₂O₃-doped CeO₂) composite cathode on CGO electrolyte at intermediate temperatures were investigated by using AC impedance analyzer. Additionally, a composite cathode of BSCF containing 30 wt.%CGO and a small quantity of Ag was prepared and studied, which shows the lowest area specific resistance (<0.1 Ω cm² at temperatures higher than 700 °C), being a high potential candidate of cathode for intermediate temperature SOFCs (IT-SOFCs, working at 800 °C or lower temperatures).