Effects of interlayer thickness on the electrochemical and mechanical properties of bi-layer cathodes for solid oxide fuel cells
By Su, Qing; Yoon, Daeil; Kim, Young Nam; Gong, Wenquan; Chen, Aiping; Cho, Sungmee; Manthiram, Arumugam; Jacobson, Allan J. & Wang, Haiyan
Published in Journal of Power Sources
NULL
2012
Abstract
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 La0.5Sr0.5CoO3-δ (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.
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