Proton and Oxygen Ionic Conductivity of Doped Ceria-Carbonate Composite by Modified Wagner Polarization

摘要: The impressive ionic conductivity and tunable conduction behaviors have made the ceria-carbonate composite an attractive electrolyte for low temperature ceramic fuel cells. However, mechanism is not yet well studied. In present study, both proton oxygen ion as transport properties of samaria-doped ceria/ sodium-lithium-carbonate (denoted SDCLN) are investigated by cell study modified Hebb-Wagner polarization measurements. multi-ionic transfer processes in under external electrical field analyzed. A maximum power density 780 mW cm(-2) a calculated total (proton ion) 0.153 S cm(-1) obtained H-2/air condition at 550 degrees C. Wagner DC measurements show that dominates conductivity. synergistic effect exists between charge carriers doped system. An ideal interfacial model also proposed based on results.