Mosaic-shaped cathode for highly durable solid oxide fuel cell under thermal stress

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• 作者：Jong Hoon Joo ; Jaewon Jeong ; Se Young Kim ; Chung-Yul Yoo ; Doh Won Jung ; Hee Jung Park ; Chan Kwak ; Ji Haeng Yu
• 关键词：Solid oxide fuel cell ; Cathode ; Thermal stability ; Surface morphology
• 刊名：Journal of Power Sources
• 出版年：1 February, 2014
• 年：2014
• 卷：247
• 期：Complete
• 页码：534-538
• 全文大小：1806 K

文摘

In this study, we propose a novel 鈥渕osaic structure鈥?for a SOFC (solid oxide fuel cell) cathode with high thermal expansion to improve the stability against thermal stress. Self-organizing mosaic-shaped cathode has been successfully achieved by controlling the amount of binder in the dip-coating solution. The anode-supported cell with mosaic-shaped cathode shows itself to be highly durable performance for rapid thermal cycles, however, the performance of the cell with a non-mosaic cathode exhibits severe deterioration originated from the delamination at the cathode/electrolyte interface after 7 thermal cycles. The thermal stability of an SOFC cathode can be evidently improved by controlling the surface morphology. In view of the importance of the thermal expansion properties of the cathode, the effects of cathode morphology on the thermal stress stability are discussed.