Direct application of cobaltite-based perovskite cathodes on the yttria-stabilized zirconia electrolyte for intermediate temperature solid oxide fuel cells

Chen, K. and Li, N. and Ai, N. and Li, M. and Cheng, Y. and Rickard, W. and Li, J. et al. 2016. Direct application of cobaltite-based perovskite cathodes on the yttria-stabilized zirconia electrolyte for intermediate temperature solid oxide fuel cells. Journal of Materials Chemistry A. 4 (45): pp. 17678-17685.

Source Title

Journal of Materials Chemistry A

DOI

10.1039/C6TA07067A

ISSN

2050-7488

School

Fuels and Energy Technology Institute

URI

http://hdl.handle.net/20.500.11937/51264

Collection

Curtin Research Publications

Abstract

© The Royal Society of Chemistry.In this communication, cobaltite-based perovskite (CBP) cathodes are directly applied on the yttria-stabilized zirconia (YSZ) electrolyte via an in situ assembly process without the addition of a doped ceria interlayer and pre-sintering at high temperatures. The results demonstrate for the first time that a CBP electrode/YSZ electrolyte interface can be formed in situ under cathodic polarization at a solid oxide fuel cell (SOFC) operating temperature of 750 °C. Nevertheless, the performance of cells with Sr-containing CBP cathodes deteriorates due to the surface segregation of Sr species and formation of a Sr-rich reaction layer at the interface. However, the stability and power density of cells with in situ assembled CBP cathodes can be further enhanced by B-site doping or by using a Sr-free CBP. The direct application of CBPs on the YSZ electrolyte revolutionizes the design of intermediate temperature SOFCs.