Improving solid oxide fuel cells with yttria-doped ceria interlayers by atomic layer deposition

The performance of solid oxide fuel cells (SOFCs) was significantly enhanced through surface modification of yttria-stabilized zirconia (YSZ) electrolyte by doped ceria interlayers. Ultra-thin yttria-doped-ceria (YDC) layers were fabricated by atomic layer deposition (ALD). The doping concentrations...

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Bibliographic Details
Published inJournal of materials chemistry Vol. 21; no. 29; pp. 10903 - 10906
Main Authors Fan, Zeng, Chao, Cheng-Chieh, Hossein-Babaei, Faraz, Prinz, Fritz B.
Format Journal Article
LanguageEnglish
Published 01.01.2011
Subjects
Cerium oxide
Deposition
Doping
Electrolytes
Interlayers
Solid oxide fuel cells
Yttria stabilized zirconia
Yttrium oxide
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Summary:The performance of solid oxide fuel cells (SOFCs) was significantly enhanced through surface modification of yttria-stabilized zirconia (YSZ) electrolyte by doped ceria interlayers. Ultra-thin yttria-doped-ceria (YDC) layers were fabricated by atomic layer deposition (ALD). The doping concentrations of Y2O3 were finely tuned by changing the Ce : Y pulsing ratios. YDC layers were inserted between bulk YSZ electrolyte and a porous Pt cathode. The performance of SOFCs with different doping concentrations of YDC interlayers was measured using the linear sweep voltammetry method at operating temperatures between 300 and 500 [degree]C. The fuel cell performance was enhanced by a factor of 2-3.6 within the Y2O3 doping range of 12-17 M%. The enhanced performance was attributed to an increased oxide ion incorporation rate at the electrode/electrolyte interface.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0959-9428
1364-5501
DOI:10.1039/c1jm11550b