Oxygen reduction mechanism at porous La1−xSrxCoO3−d cathodes/La0.8Sr0.2Ga0.8Mg0.2O2.8 electrolyte interface for solid oxide fuel cells

Sr2Fe1.5Mo0.5O6 as Cathodes for Intermediate-Temperature Solid Oxide Fuel Cells with La0.8Sr0.2Ga0.87Mg0.13O3 Electrolyte

“…It can be seen that the R p of the cell with electrodes fired at 1000 C is the smallest, with a value of only about 0.076 X cm 2 at 800 C in air, even lower than that of the LSC cathode on the LSGM electrolyte ($0.089 X cm 2 at 800 C in air) (Ref. 24). As shown in Fig.…”

Porous La0.6Sr0.4CoO3−δ thin film cathodes for large area micro solid oxide fuel cell power generators

“…[33][34][35]) together with the large mismatch in the thermal expansion coefficient of LSC vs. YSZ (TEC LSC = 23 ppm/K; TEC YSZ = 11 ppm/K [36][37][38]) limit its applicability at high operating temperatures or in devices involving high T fabrication steps (T>700ºC). In this sense, alternative electrolytes or barrier diffusion layers are sometimes introduced between the electrolyte and the cathode for reducing these effects but still degradation by detachment is present [39][40][41]. The implementation of the LSC layer in porous thin film form has been recently proposed as a good solution for this particular problem showing very promising results in the intermediate range of temperatures (T<700ºC) [21][22][23]42].…”

Electrochemical Impedance Spectroscopy Study of the Mass Transfer in an Anode-Supported Microtubular Solid Oxide Fuel Cell

“…In particular, the author's group has developed diagnosis methods of operating status of the polymer electrolyte fuel cell (PEFC) by analyzing the variation of resistances and capacitances of equivalent circuit models of the PEFC (Konomi & Saho, 2006;Nakajima et al, 2008). For the SOFC, a number of EIS analyses have been reported (Barsoukov & Macdonald, 2005;Esquirol et al, 2004;Horita et al, 2001;Huang et al, 2007;Ishihara et al, 2000;Jiang, 2002;Leonide et al, 2010;McIntosh et al, 2003). Although many of those reports focused on the characterization of developed materials, there were very few reports (Barfod et al, 2007) that analyze each impedance of the anode and cathode in the full cell impedance of a practical cell simultaneously and separately by applying EIS under operation.…”