Enhancing oxide ion incorporation kinetics by nanoscale Yttria-doped ceria interlayers.
basic_science · Level V
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- Record sourced from PubMed, PMID 21563786.
- Also identified by DOI 10.1021/nl104417n.
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Abstract
Interlayering 17.5 nm of Yttria-doped ceria (YDC) thin films between bulk yttria-stabilized-zirconia electrolyte and a porous Pt cathode enhanced the performance of low-temperature solid oxide fuel cells. The added YDC interlayer (14.11% doped Y(2)O(3)) was fabricated by atomic layer deposition and reduced the cathode/electrolyte interfacial resistances while increasing the exchange current density j(0) by a factor of 4 at operating temperatures between 300-500 °C. Tafel plots and the fitted impedance data suggest that the charge transfer coefficient α of interlayered SOFCs was 1.25 times higher, and the electrode/interfacial activation energy was reduced from 0.85 to 0.76 eV.
Medical subject headings
- Cerium
- Membranes, Artificial
- Oxides
- Yttrium