Investigation of Y1-xCaxBaCo2O5+δ Cathodes for Intermediate-Temperature Solid Oxide Fuel Cells

Wu Jie Ge; Qun Shao; Yan Zhi Ding; Xiao Yong Lu

doi:10.4028/www.scientific.net/AMR.830.130

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 830Investigation of Y1-xCaxBaCo2O5+δ Cathodes for...

Investigation of Y_1-xCa_xBaCo₂O_5+δ Cathodes for Intermediate-Temperature Solid Oxide Fuel Cells

Abstract:

Double-perovskites Y_1-xCa_xBaCo₂O_5+δ (YCBC,x = 0.1-0.5) were synthesized with a auto ignition process and were assessed as cathode materials for intermediate-temperature solid oxide fuel cells (IT-SOFCx) based on Sm_0.2Ce_0.8O_1.9(SDC) electrolyte. X-ray diffraction confirms that there are some undesired peaks in YCBC0.1 and YCBC0.5, while the YCBC (x = 0.2-0.4) retains single phase with tetragonal structure. The YCBC materials exhibit chemical compatibility with SDC electrolyte up to a temperature of 1100°C. The conductivity of the samples decreases with increasing Ca content, and the maximum conductivity of YCBC is 506 Scm^-1 for x = 0.2 sample. The increased doping of Ca deteriorates the area-specific resistances of YCBC (x = 0.2-0.4) cathodes. The Rp values of YCBC cathodes at x = 0.2,0.3 and 0.4 on the SDC electrolyte are 0.26, 0.53 and 1.19Ωcm² at 650°C, respectively. This study suggests that YCBC0.2 can be potential candidates for utilization as IT-SOFCs cathode.

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Periodical:

Advanced Materials Research (Volume 830)

Pages:

130-134

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.830.130

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Online since:

October 2013

Authors:

Wu Jie Ge, Qun Shao, Yan Zhi Ding*, Xiao Yong Lu

Keywords:

Area-Specific Resistances, Cathode, Intermediate-Temperature Solid Oxide Fuel Cells

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