Performance and stability of proton conducting solid oxide fuel cells based on yttrium-doped barium cerate-zirconate thin-film electrolyte

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DOIResolve DOI: http://doi.org/10.1016/j.jpowsour.2012.11.094
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TypeArticle
Journal titleJournal of Power Sources
ISSN0378-7753
Volume229
Pages4857; # of pages: 10
SubjectYttrium-doped barium cerate-zirconate; Proton conducting SOFCs; Stability; Thin-film electrolyte; Reversible SOFCs
AbstractThe high performance anode supported single cells, comprising of BSCF (Ba0.5Sr0.5Co0.8Fe0.2O3−δ)-BCZY (Ba0.98Ce0.6Zr0.2Y0.2O3−δ)//BCZY//NiO–BCZY have been fabricated by wet powder spraying and co-firing for depositing 10–15 μm thin film electrolytes on pre-sintered NiO–BCZY anode discs. The open circuit voltages of single cells were around 1.12–1.13 V at 600 °C indicating negligible gas leakage or mixed conduction through the electrolyte. The maximum power density of 493 mW cm−2 was obtained at 600 °C and 0.7 V under humid air as the oxidant gas and humid 75% H2 in N2 (2.76% H2O) as the fuel gas at a gas flow rate of 100 ml min−1. The area specific resistance of an anode supported button cell of BSCF–BCZY//BCZY//NiO–BCZY in fuel cell mode was about 0.46 Ω cm2 and in the electrolysis mode was 0.26 Ω cm2 at 600 °C, indicating high efficiency, reversible SOFCs. The single cell performance was stable for over 600 h at 600 °C. The stability of BCZY electrolyte in water-containing atmospheres was investigated by exposing sintered BCZY pellets to humid air (2.76% H2O) at 200 °C for 24 h or soaking them in boiling water for 3 h.
Publication date
LanguageEnglish
AffiliationEnergy, Mining and Environment; National Research Council Canada
Peer reviewedYes
IdentifierS0378775312017697
NRC number53111
NPARC number21268498
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Record identifier6d3fd6e1-4614-47a5-ae8e-84dbda810335
Record created2013-08-16
Record modified2016-05-09
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