Optimum cathode configuration for IT-SOFC using La0.4Ba0.6CoO3−δ and Ce0.9Gd0.1O1.95

Stabilization of the cubic perovskite in the system La 1−x Ba x Co 1−y Fe y O 3−δ (0.7 ≤ x ≤ 0.9) and its electrochemical performance as cathode materials for intermediate-temperature solid oxide fuel cells

“…14 shows the Arrhenius plot of the total polarization resistance (R p ) obtained for the La 1Àx Ba x Co 1Ày Fe y O 3Àd electrodes, in air. It can be observed that the incorporation of Fe increases the polarization resistance of the electrode materials compared to the values (w0.13 U cm 2 at 600 C) obtained in a previous paper [20] for Fe free electrodes with a cell configuration similar to the one used in this work. From all the compositions tested, the minimum polarization resistance was obtained for the La 0.3 Ba 0.7 Co 0.6 Fe 0.4 O 3Àd material.…”

“…The electrodes deposited on dense GDC pellets consisted of two layers: one of porous GDC, approximately 5 mm thick, on the surface of the electrolyte to avoid adherences issues[19,20] and a porous layer of the perovskite phases La 1Àx Ba x Co 1Ày Fe y O 3Àd 30 mm thick. For instance,…”

Effect of Cation Ordering on the Performance and Chemical Stability of Layered Double Perovskite Cathodes

“…In our recent work [25], we demonstrated that the ordered LaBaCo 2 O 5+δ phase is a metastable variant of the A-site cation disordered phase, La 0.5 Ba 0.5 CoO 3−δ . Several authors have studied the effects of A-site cation ordering on the performance of LaBaCo 2 O 5+δ and La 0.5 Ba 0.5 CoO 3−δ for SOFC application [26,27,28], although it has yet to be studied for PCFC application. Both the ordered and disordered variants demonstrate low polarization resistances at temperatures as low as 600 °C (<0.2 Ω·cm 2 ) due to the excellent mixed conducting (electron hole and oxide-ion) nature of the material.…”

Investigation of thin perovskite layers between cathode and doped ceria used as buffer layer in solid oxide fuel cells

“…Therefore, there is ongoing search for novel cathode materials exhibiting an improved performance at temperatures below 800°C [4][5][6]. Apart from an appropriate chemical composition of the cathode, it is also important to properly adjust the microstructure, especially of the cathode/electrolyte interface [7][8][9][10]. As a result, it became a common practice to incorporate of at least 10-μm-thick cathode functional layer, which has a finer microstructure than a cathode current collector layer [11].…”