Structural optimization of (La, Sr)CoO₃-based multilayered composite cathode for?solid-oxide fuel cells

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• 作者：Sun-Young Park ; Ho-Il Ji ; Hae-Ryoung Kim ; Kyung Joong Yoon ; Ji-Won Son ; Byung-Kook Kim ; Hae-Jun Je ; Hae-Weon Lee ; Jong-Ho Lee ; ^{jongho@kist.re.kr}
• 关键词：Lanthanum strontium cobaltite ; Solid-oxide fuel cell ; Cathode functional layer ; Cathode-current-collecting layer ; Oxygen reduction reaction
• 刊名：Journal of Power Sources
• 出版年：2013
• 出版时间：15 April, 2013
• 年：2013
• 卷：228
• 期：Complete
• 页码：97-103
• 全文大小：932 K

文摘

In the present study, (La, Sr)CoO₃ material was screen-printed as a cathode and as current-collecting layers for planar-type low-temperature solid-oxide fuel cells (SOFCs). The compositional effects of the cathode functional and current-collecting layer on unit-cell performance were investigated using AC and DC polarization experiments. Two different cathode (La, Sr)CoO₃ materials, La_0.6Sr_0.4CoO₃ and La_0.8Sr_0.2CoO₃, were examined, and La_0.6Sr_0.4CoO₃ was found to be more effective for increasing the electrocatalytic activation and collection efficiency of the current produced in the cathode reaction. Furthermore, a well-designed architecture for the current-collecting layer was very effective in increasing unit-cell performance by reducing the contact resistance between SOFC cathodes and interconnects.