Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1461517 | Ceramics International | 2014 | 6 Pages |
Aluminum oxide was deposited into the porous cathode compartment of the (Sc,Al)-doped ZrO2 electrolyte cell through atomic layer deposition involving trimethyl aluminum and water as aluminum and oxygen sources, respectively. The deposited aluminum oxide had a detrimental effect on the cell performance of the zirconia-based SOFC unit cells in terms of the output power but did not change the open-cell voltage. Based on impedance spectroscopy, the open-cell voltage, and the output performance, the resultant degradation is attributed to the geometrical blockade of functional triple phase boundaries in La0.6Sr0.4CoO3 (LSCo)-based cathode materials of mixed ionic electronic conduction, indicating that there is a disruption at the interface between the charge collector and cathode that is proportional to the amount of deposited Al2O3.