Investigating oxygen reduction pathways on pristine SOFC cathode surfaces by <i>in situ</i> PLD impedance spectroscopy
Matthäus Siebenhofer, Christoph Riedl, Alexander Schmid, Andreas Limbeck, Alexander Karl Opitz, Jürgen Fleig, Markus Kubicek
Abstract
Temperature and p (O 2 ) dependences of the oxygen exchange kinetics of SOFC cathode materials were correlated with point defect concentrations. Defect chemical contributions were identified as a major part of effectively measured activation energies.
Topics & Concepts
CathodeDielectric spectroscopyIn situOxygen reductionMaterials scienceReduction (mathematics)Electrical impedanceOxygenChemical engineeringAnalytical Chemistry (journal)ChemistryElectrodeElectrical engineeringEnvironmental chemistryElectrochemistryEngineeringOrganic chemistryPhysical chemistryMathematicsGeometryAdvancements in Solid Oxide Fuel CellsElectronic and Structural Properties of OxidesFuel Cells and Related Materials