Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10569583 | Solid State Ionics | 2018 | 8 Pages |
Abstract
A series of Ce0.8Gd0.2âxPrxO1.90 (xâ¯=â¯0-0.10) compositions have been synthesized by citric acid-nitrate combustion method for intermediate temperature solid oxide fuel cells (ITSOFCs). Characterization studies were carried out with X-ray diffraction (XRD), scanning electron microscopy (SEM) and AC impedance spectroscopy. X-ray diffraction results showed that a single-phase fluorite structure formed at a relatively low calcination temperature which is 600â¯Â°C. Dense Ce0.8Gd0.2âxPrxO1.90 pellets were successfully prepared by sintering at 1400â¯Â°C for 6â¯h. The relative density of Ce0.8Gd0.2âxPrxO1.90 samples was over 94% of the theoretical density. The two-probe AC impedance spectroscopy was used to study the ionic conductivity of co-doped ceria samples. According to the electrochemical impedance spectroscopy results, the conductivity of the Ce0.8Gd0.10Pr0.10O1.90 (ÏTotal,750 °Câ¯=â¯5.1â¯Ãâ¯10â2â¯S/cm) composition was found to be higher than that of gadolinia-doped ceria (Ce0.8Gd0.20O1.90 (ÏTotal,750 °Câ¯=â¯3.4â¯Ãâ¯10â2â¯S/cm). Due to higher ionic conductivity, it is thought that this composition can be a potential candidate to be used as an electrolyte material in ITSOFCs applications.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Aliye Arabacı,