High temperature transport properties of La0.5-xPrxBa0.5CoO3-δ perovskite (x = 0, 0.2, 0.5)

Correlating High-Temperature Defect and Magnetic Structures with Anomalous Chemical Expansion in an Outstanding PrBa0.5Sr0.5Co1.5Fe0.5O6−δ Positrode

“…One should note however that similar inconsistencies are typical for other layered cobaltites, especially when studied by different authors. 46,67,68 Still, at a semiquantitative level, the data obtained in this work supports earlier findings: PBSCF conductivity increases at cooling and becomes constant at ∼600 K. Also, the measured Seebeck coefficient supports the highly conductive nature of the studied compound, being less than 50 μV/K even at 1223 K, Figure S5 in the Supporting Information. Nevertheless, PBSCF conductive properties appear to be inferior to pristine PBC, 27,69 the respective data are shown in Figure 5(b) as a function of oxygen nonstoichiometry δ (the conductivity of PBSCF was replotted as a function of δ with the help of the developed defect formation model).…”

“…Interestingly, the preliminarily measured temperature dependence of PBSCF conductivity in air is in some contradiction with the earlier reported data at T < 700 K but agrees well at higher T values, , see Figure S5 in the Supporting file. One should note however that similar inconsistencies are typical for other layered cobaltites, especially when studied by different authors. ,, Still, at a semiquantitative level, the data obtained in this work supports earlier findings: PBSCF conductivity increases at cooling and becomes constant at ∼600 K. Also, the measured Seebeck coefficient supports the highly conductive nature of the studied compound, being less than 50 μV/K even at 1223 K, Figure S5 in the Supporting Information. Nevertheless, PBSCF conductive properties appear to be inferior to pristine PBC, , the respective data are shown in Figure (b) as a function of oxygen nonstoichiometry δ (the conductivity of PBSCF was replotted as a function of δ with the help of the developed defect formation model).…”

Structural and Electrochemical Analysis of SmBa0.8Sr0.2Co2O5+δ Cathode Oxide for IT-SOFCs

“…With superior characteristics such as high void oxygen concentration, high electronic conductivity, and good catalytic activity, double perovskite materials have received increased attention. It has been intensively researched, the characteristics of the double layer perovskite cathode material with the chemical formula LnBaCo2O5+δ (Ln-selected lanthanide) [5]. A lot of works using various lanthanides and alkaline earth metals into the A-site of double perovskites to enhance oxygen mobility in the LnO field include LaBa0.5Sr0.25Ca0.25Co2O5+δ [6] LnBa0.5Sr0.5Co1.5Fe0.5O5+δ (Ln=La and Nd) [7], SmBa0.5Sr0.5Co2O5+δ [8], PrBa0.5Sr0.5Co2-xFex O5+δ [9], PrBa0.5Sr0.5Co2−xNixO5+δ [10], YBa1-xSrxCo2O5+δ [11], GdBa1-xSrxCo2O5+δ (0⩽x ⩽1.0) [12], LaBa0.5Sr0.5Co2O5+δ [13].…”