Publication | Closed Access
Atomic Layer Deposition Functionalized Composite SOFC Cathode La<sub>0.6</sub>Sr<sub>0.4</sub>Fe<sub>0.8</sub>Co<sub>0.2</sub>O<sub>3-δ</sub> -Gd<sub>0.2</sub>Ce<sub>0.8</sub>O<sub>1.9</sub>: Enhanced Long-Term Stability
88
Citations
45
References
2013
Year
Materials ScienceOxide HeterostructuresEngineeringBattery Electrode MaterialsEnhanced Long-term StabilityElectrode-electrolyte InterfaceOxide ElectronicsAdvanced Electrode MaterialSurface ScienceApplied PhysicsConventional Mixed Oxide-ionPristine Lscf-gdc CathodeOvercoated Lscf-gdc CathodeBatteriesChemistryChemical DepositionChemical Vapor DepositionElectrochemistry
We report that the long-term stability of a conventional mixed oxide-ion and electron conducting solid oxide fuel cell cathode, La0.6Sr0.4Fe0.8Co0.2O3−δ-Gd0.2Ce0.8O1.9 (LSCF-GDC) composite, can be markedly improved by functionalizing its surfaces with a conformal layer of nanoscale ZrO2 films through atomic layer deposition (ALD). Over a >1100 h testing at 800 °C, the overcoated LSCF-GDC cathode exhibited respective polarization and ohmic area-specific-resistances 3 and 1.5 times lower than the pristine sample, whereas the pristine LSCF-GDC cathode degraded at a rate 4 times faster than the overcoated one. The multifunctionality of porosity, mixed conductivity, and suppressed Sr-enrichment enabled by the nanoscaled ALD-ZrO2 overcoats are attributed to the performance retention observed for the overcoated cathode.
| Year | Citations | |
|---|---|---|
Page 1
Page 1