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  • Enhancing oxide ion incorporation kinetics by nanoscale Yttria-doped ceria interlayers.

Enhancing oxide ion incorporation kinetics by nanoscale Yttria-doped ceria interlayers.

Nano letters (2011-05-14)
Zeng Fan, Fritz B Prinz
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.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Cerium(IV) oxide-yttria doped, nanopowder, yttria 20 mol %, <50 nm particle size (TEM), 99.9% trace metals basis
Sigma-Aldrich
Yttrium(III) oxide, nanopowder, <50 nm particle size
Sigma-Aldrich
Yttrium(III) oxide, 99.999% trace metals basis
Sigma-Aldrich
Yttrium(III) oxide, 99.99% trace metals basis
Sigma-Aldrich
Yttrium(III) oxide, dispersion, 10 wt. % in isopropanol, nanoparticles, <100 nm (DLS), ≥99.9% trace metals basis