Layered SmBaCuCoO5+ and SmBaCuFeO5+ perovskite oxides as cathode materials for proton-conducting SOFCs

A novel cobalt-free layered perovskite-type GdBaFeNiO5+δ cathode material for proton-conducting intermediate temperature solid oxide fuel cells

“…The sample displays a semi-conductor conduction behavior between 300 and 375 C, whereas a metallic-like conduction behavior above 375 C. This trend is similar to that for SmBaCuFeO 5þd [19], SmBaCuCoO 5þd [19] and GdBaCo 2 O 5þd [17]. Nian et al reported that the conductivities of SmBaCuFeO 5þd and SmBaCuCoO 5þd cathode materials reached 95e158 S cm À1 and 168e216 S cm À1 in air at 400e800 C, respectively [19]. Tarancon et al reported that the conductivities of GdBaCo 2 O 5þd cathode material reached 30e40 S cm À1 in air at 500e800 C [17].…”

“…Tarancon et al reported that the conductivities of GdBaCo 2 O 5þd cathode material reached 30e40 S cm À1 in air at 500e800 C [17]. The conductivities of the GBFN cathode material reached 128e161 S cm À1 in air at 300e800 C reported by us, which are comparable to those of SmBaCuFeO 5þd [19] and lower than those of SmBaCuCoO 5þd [19], but much higher than those of GdBaCo 2 O 5þd [17], indicating the GBFN has satisfactory conducting performance as cathode material for IT-SOFCs.…”

SmBaCoCuO5+x as cathode material based on GDC electrolyte for intermediate-temperature solid oxide fuel cells

“…It can be seen that SBCCO crystallize in a single phase double-perovskite after sintering at 1000 • C through intermediate grinding and calcining at 950 • C and 975 • C. All the diffraction peaks of SBCCO sample can be indexed with an orthorhombic crystal structure. The results are in agreement with those reported by different groups [9,16,18]. The reaction between electrode and electrolyte is undesirable for the long-term stability of SOFCs.…”

“…Recently, the LaBaCuCoO 5+x cathode based on BaZr 0.1 Ce 0.7 Y 0.2 O 3−ı electrolyte for proton-conducting fuel cells has been reported by Ling et al [15]. And we know that Nian et al [16] have also evaluated the performance of layered SmBaCoCuO 5+x (SBCCO) as a cathode in proton-conducting fuel cells based on BaCe 0.8 Sm 0.2 O 3−ı electrolyte. However, to the best of our knowledge, the performance of SBCCO cathodes in oxygen-ion conducting fuel cells has not been reported to date.…”

Advanced materials for SOFC application: Strategies for the development of highly conductive and stable solid oxide proton electrolytes

“…In this view point, another representative of proton-conducting materials (BaZrO 3 ) has undoubted advantages because of the absence of phase transitions from room conditions to the temperature of its melting point [1,128]. At the same time, the thermal expansion coefficients of BaZrO 3 -based electrolytes are lower by 20-30 % than those for BaCeO 3 -based ones (Table 13, [1,52,[129][130][131][132][133][134][135][136][137][138][139]), fact that complicates the selection of compatible electrode materials. The use of proton-conducting electrolytes based on BaCeO 3 -BaZrO 3 solid solutions can be considered as one of the most optimal ways for the realization of the It should be noted that the phase structure of these materials it is not affected only by the temperature.…”