Effects of interlayer thickness on the electrochemical and mechanical properties of bi-layer cathodes for solid oxide fuel cells

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• 作者：Qing Su ; Daeil Yoon ; Young Nam Kim ; Wenquan Gong ; Aiping Chen ; Sungmee Cho ; Arumugam Manthiram ; Allan J. Jacobson ; Haiyan Wang
• 关键词：Bi-layer cathode ; La0.5Sr0.5CoO3&minus ; ¦Ä ; Thin film SOFC ; Thickness variation ; Hybrid method
• 刊名：Journal of Power Sources
• 出版年：2012
• 出版时间：15 November, 2012
• 年：2012
• 卷：218
• 期：Complete
• 页码：261-267
• 全文大小：1510 K

文摘

A hybrid method that combines an interlayer prepared by a pulsed laser deposition (PLD) technique and a conventional cathode prepared by a screen printing method is employed to fabricate bi-layer La_0.5Sr_0.5CoO_3?¦Ä (LSCO) cathodes. Robust bi-layer cathode films are successfully fabricated with a porous microstructure and excellent integrity with the underlying electrolyte layer. By adjusting the thickness of the PLD interlayers from ¡«50 to ¡«500?nm, a systematic variation of the electrochemical and mechanical properties of the bi-layer cathodes is observed. Compared with single cells without an interlayer, the anode-supported single cells with an LSCO interlayer thickness of ¡«100?nm exhibit significant enhancement in the overall power performance.