Fabrication and characterisation of a large-area solid oxide fuel cell based on dual tape cast YSZ electrode skeleton supported YSZ electrolytes with vanadate and ferrite perovskite-impregnated anodes and cathodes

Infiltration of ceramic materials into a pre-formed ceramic scaffold is an effective way of fabricating a solid oxide fuel cell with nano-structured ceramic electrodes by avoiding detrimental interfacial reactions through low-temperature processing for achieving high performance using hydrogen as we...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2014-01, Vol.2 (45), p.19150-19155
Main Authors: Ni, C S, Vohs, J M, Gorte, R J, Irvine, JTS
Format: Article
Language:English
Subjects:
Ceramics
Electrodes
Electrolytes
Infiltration
Nanostructure
Scaffolds
Solid oxide fuel cells
Yttria stabilized zirconia
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Summary:Infiltration of ceramic materials into a pre-formed ceramic scaffold is an effective way of fabricating a solid oxide fuel cell with nano-structured ceramic electrodes by avoiding detrimental interfacial reactions through low-temperature processing for achieving high performance using hydrogen as well as a carbonaceous fuel. However, there are significant concerns about the applicability of this method because of the difficulty in fabricating a large-area gas-tight but thin electrolyte between two highly porous ceramic and the multiple repetitions of infiltration process. Here, a large-area (5 cm by 5 cm) scaffold with a thin yttria-stabilized zirconia (YSZ) electrolyte sandwiched between two identical porous structures is prepared by tape casting and co-firing, and then solution precursors are impregnated into the porous scaffolds to prepare nano-structured La sub(0.8)Sr sub(0.2)FeO sub(3) (LSF) and La sub(0.7)Sr sub(0.3)VO sub(3- delta ) (LSV sub(red)). The thus prepared solid oxide fuel cell with 10 wt% ceria + 1 wt% Pd as a catalyst in anodes shows a peak power of 489 mW cm super(-2) ( similar to 6 W per cell) at 800 degree C using H sub(2) as a fuel and air as an oxidant. This large-area fuel cell retained the integrity of the thin electrolyte and high performance after the reducing-oxidation cycle at 900 degree C, showing superiority over the conventional Ni(O)-YSZ based support.
ISSN:2050-7488
2050-7496
DOI:10.1039/c4ta04789c