Effects of cobalt metal addition on sintering and ionic conductivity of Sm(Y)-doped ceria solid electrolyte for SOFC

Study of the Transport Properties of the Mixed Ionic Electronic Conductor Ce1−xTbxO2−δ + Co (x = 0.1, 0.2) and Evaluation As Oxygen-Transport Membrane

“…Figure 1, confirm the grain size growth [27]. EDS did not prove the presence of Co in any preferential location, e.g., in the grain boundary as reported for other doped cerias.…”

Effect of Dysprosia Additive on the Consolidation of CeO2 by Spark Plasma Sintering

“…However, when samples were sintered at 1050°C, the density was significantly higher, increasing from 91% to 97% as the Dy 2 O 3 content was increased from 0 to 10 wt%. The effect of dopant oxide additions on the densification and grain growth of ceria has been studied previously . Inaba et al .…”

“…The effect of dopant oxide additions on the densification and grain growth of ceria has been studied previously. [21][22][23] Inaba et al examined the sintering behavior of pure and 20 mol% Gd-doped ceria and reported higher densification and lower grain growth for the doped samples relative to the pure oxide. 24 The effect of gadolinia addition on grain size was also reported in a study by Esposito and Traversa 25 where they showed a decrease in grain size as a function of gadolinia concentration up to about 5 mol% and no further effect for higher concentrations.…”

Effect of transition metal oxides doping on Ce0.9Sm0.05Nd0.05O1.95 solid electrolyte materials

“…The remarkable improvement of GB conductivity by TMOs addition maybe due to the formation of a TMO-rich grain boundary layer: the TMO ions easily located at the grain boundaries during the sintering process and resulted in different distortions of the surrounding lattices and higher oxygen vacancy mobility through the grain boundaries, thus improved the GB conductivity [5,11]. The SNDC-Fe1 has the maximum GB conductivity, it is reported that compared with MnO 2 and CoO 1.5 , FeO 1.5 can not only alter the oxygen vacancy mobility in the grain boundary as discussed above, it also acted as a scavenger by reacting with SiO 2 in the grain boundary which further decreased the resistance of grain boundary [18].…”

“…Nevertheless, as a result of the refractory nature, the SNDC electrolyte material should be sintered around 1600 ℃ to obtain proper apparent density. Such a high temperature will cause atomic diffusion and solid reactions between cell components during the fabrication process, which has a detrimental effect on the performance of SOFCs [4,11]. To overcome this problem, addition of sintering aids to promote densification has been adopted.…”