Ionic conductivity of stabilized zirconia networks in composite SOFC electrodes

Effect of the Ionic Conductivity of the Electrolyte in Composite SOFC Cathodes

Solid oxide fuel cell (SOFC) cathodes were prepared by infiltration of 35 wt % La0.8Sr0.2FeO3 (LSF) into porous scaffolds of three, zirconia-based electrolytes in order to determine the effect of the ionic conductivity of the electrolyte material on cathode impedances. The electrolyte scaffolds were 10 mol % Sc2O3-stabilized zirconia (ScSZ), 8 mol % Y2O3-stabilized zirconia (YSZ), and 3 mol % Y...

Ionic conductivity of nanocrystalline yttria-stabilized zirconia: Grain boundary and size effects

O. J. Durá,1 M. A. López de la Torre,1 L. Vázquez,2 J. Chaboy,3 R. Boada,3 A. Rivera-Calzada,4 J. Santamaria,4 and C. Leon4 1Departamento de Física Aplicada and INEI, Universidad de Castilla-la Mancha, 13071 Ciudad Real, Spain 2Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, 28049 Madrid, Spain 3Instituto de Ciencia de Materiales de Aragón, Consejo Superior de Investigaciones C...

Defect structure of yttria-stabilized zirconia and its influence on the ionic conductivity at elevated temperatures

The defect structure of cubic fluorite structured yttria-stabilized zirconia (ZrO2)12x(Y2O3)x has been investigated over the composition range 0.100(4)<x<0.241(10) and temperatures T(K) up to 2780~10! K, using single-crystal specimens. Analysis of neutron and x-ray diffraction data, including both Bragg and coherent diffuse scattering components, has identified three principal types of defects ...

Ionic conductivity and thermal stability of magnetron-sputtered nanocrystalline yttria- stabilized zirconia

Enhancing ionic conductivity of bulk single-crystal yttria-stabilized zirconia by tailoring dopant distribution

We present an ab initio–based kinetic Monte Carlo model for ionic conductivity in single-crystal yttriastabilized zirconia. Ionic interactions are taken into account by combining density functional theory calculations and the cluster expansion method and are found to be essential in reproducing the effective activation energy observed in experiments. The model predicts that the effective energy...