Effects of bi-layer La0.6Sr0.4Co0.2Fe0.8O3−δ-based cathodes on characteristics of intermediate temperature solid oxide fuel cells

Sr1−xPrxCo0.95Sn0.05O3−δ ceramic as a cathode material for intermediate-temperature solid oxide fuel cells

“…The average grain sizes of the O 3Àd ceramic could be attributed to the hopping conduction mechanism of small polaron (i.e., localized electronic charge carrier Co Co ) characterized with thermally activated mobility [20]. The tin ions stabilizing the 3D framework of the corner sharing CoO 6 octahedra with an open CoeOeCo angle (linear bond) facilitated the overlapping of the Co(3d)e O(2p) orbital [27,29,30]. Transport of electrons appeared to move along the Co 4þ eO 2À eCo 3þ network with a Zerner double process while transport of oxygen ions proceeded by the hopping of the oxygen vacancies [4,22,27].…”

“…In a previous study in which tin ions were introduced in the SrCoO 3Àd oxide to modify its electrical properties for serving as an IT-SOFC cathode, a SrCo 0.95 Sn 0.05 O 3Àd ceramic with a theoretical density (TD) of 95% was found to reach a maximum electrical conductivity of 545 S/cm at 550 C [30]. In this study, further investigation on the substitution of praseodymium ions in the A-site positions of the SrCo 0.95 Sn 0.05 O 3Àd ceramic was performed to modify its electrical conductivity and electrocatalytic behavior.…”

Solid oxide fuel cells with (La,Sr)(Ga,Mg)O 3-δ electrolyte film deposited by radio-frequency magnetron sputtering

“…The anodesupported substrates integrated a three-layer anode composed of a current collector layer (outer layer) of pure NiO and two functional layers of NiO-SDC composites with ratios of 60 wt%/40 wt% and 50 wt%/50 wt%. Detailed information for the preparation of the anode-supported substrates has been illustrated in a previous paper [23].…”

“…The electrochemical performance of the single cell was measured with the setup of a commercially available ProboStat (NorECs, Norway). The procedures of the electrochemical test have also been illustrated in a previous paper [23].…”

Characterization and performance of cobalt-free perovskite-type La0.6Ba0.4Fe0.8Ni0.2O3 − δ cathode material for intermediate-temperature solid oxide fuel cells

“…Due to the high mixed ionic-electronic conductivity and fast oxygen exchange kinetics, many perovskite-type oxides containing cobalt elements such as La 1 − x Sr x Co 1 − y Fe y O 3 − δ (LSCF) [4,5], Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3 − δ (BSCF) [6,7], and Sm 0.5 Sr 0.5 CoO 3 − δ (SSC) [8,9] have been widely investigated as potential cathode materials for IT-SOFCs. However, there are several disadvantages for these cathode materials, such as high thermal expansion coefficient (TEC), poor stability, and high cost of cobalt element, which would limit their wide application.…”