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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 423-426Effect of Ce0.8Sm0.2O1.9 Interlayer on the...

Effect of Ce_0.8Sm_0.2O_1.9 Interlayer on the Electrochemical Performance of LaBaCo₂O_5+δ Cathode for IT-SOFCs

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Abstract:

The Ce_0.8Sm_0.2O_1.9 (SDC) interlayer was prepared by screen-printing method between LaBaCo₂O_5+δ (LBCO) cathode and 8YSZ electrolyte for intermediate-temperature solid oxide fuel cells (IT-SOFCs). The effect of SDC interlayer on the electrochemical performance of LBCO cathode was investigated. Experimental results showed that the LBCO cathode with SDC interlayer showed much lower area-specific resistance (ASR) and polarization overpotential than that of LBCO cathode without SDC interlayer at the same test condition, exhibiting the better electrochemical performance. For LBCO cathode with SDC interlayer, the ASR was 0.457 Ωcm² at 800 °C in air, about 36.2 % lower than that of the LBCO cathode without SDC interlayer, and the cathodic overpotential was reduced by 38.0 % at a current density of 0.02 Acm^-2 at 700 °C in air. The application of a thin-layer SDC interlayer between cathode and dense 8YSZ electrolyte showed great potential in improving the cathode performance for IT-SOFCs.

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Periodical:

Applied Mechanics and Materials (Volumes 423-426)

Pages:

532-536

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.423-426.532

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Online since:

September 2013

Authors:

Rui Feng Li*, Shou Cheng He, Lu Cun Guo

Keywords:

Cathode, Electrochemical Performance, Interlayer, IT-SOFCs

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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