Low temperature solid oxide fuel cells with pulsed laser deposited bi-layer electrolyte

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DOIResolve DOI: http://doi.org/10.1016/j.jpowsour.2006.09.102
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TypeArticle
Journal titleJournal of Power Sources
ISSN1873-2755
Volume164
Issue1
Pages182188; # of pages: 7
SubjectSOFC; Low temperature; SDC; ScSZ; Bi-layer electrolyte; Pulsed laser deposition
AbstractSolid oxide fuel cells (SOFC) using a pulsed laser deposited bi-layer electrolyte have been successfully fabricated and have shown very good performance at low operating temperatures. The cell reaches power densities of 0.5 W cm−2 at 550 °C and 0.9 W cm−2 at 600 °C, with open circuit voltage (OCV) values larger than 1.04 V. The bi-layer electrolyte contains a 6–7 μm thick samarium-doped ceria (SDC) layer deposited over a ∼1 μm thick scandium-stabilized zirconia (ScSZ) layer. The electrical leaking between the anode and cathode through the SDC electrolyte, which due to the reduction of Ce4+ to Ce3+ in reducing environment when using a single layer SDC electrolyte, has been eliminated by adopting the bi-layer electrolyte concept. Both ScSZ and SDC layers in the bi-layer electrolyte prepared by the pulsed laser deposition (PLD) technique are the highly conductive cubic phases. Poor conductive (Zr, Ce)O2-based solid solutions or β-phase ScSZ were not found in the bi-layer electrolyte prepared by the PLD due to low processing temperatures of the technique. Excellent reliability and flexibility of the PLD technique makes it a very promising technique for the fabrication of thin electrolyte layer for SOFCs operating at reduced temperatures.
Publication date
LanguageEnglish
AffiliationNRC Industrial Materials Institute; NRC Institute for Fuel Cell Innovation; National Research Council Canada
Peer reviewedYes
NPARC number21274296
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Record identifier1fdc94b0-198b-44b0-9c07-4820148baabb
Record created2015-03-09
Record modified2016-05-09
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