Cobalt-site cerium doped SmxSr1−xCoO3−δ oxides as potential cathode materials for solid-oxide fuel cells

Characterization of the microstructure and electrochemical behavior of Sm0.7Sr0.3Co3−δ cathode deposited by solution precursor plasma spraying

“…Since little literature on the polarization of strontium doped samarium cobaltite prepared through SPPS was found, the direct comparison of the polarization is difficult. It can be found that the polarization of 0.07 U cm 2 observed at 900 C for SSC in this study is comparable to that of Sm 0.5 Sr 0.5 CoO 3 -d reported by Fukunaga et al [18], although the polarization at 700 C is larger than those reported by reported by Zhang [19] and Jung [20] for the Sm 0.5 Sr 0.5 CoO 3Àd cathodes prepared by sintering method. However, The interface contact between SSC particles and YSZ electrolyte can be improved through controlling YSZ substrate temperature before deposition of SSC, subsequently resulting in further reduction of the cathode polarization.…”

Unprecedented Perovskite Oxyfluoride Membranes with High‐Efficiency Oxygen Ion Transport Paths for Low‐Temperature Oxygen Permeation

“…Consequently, high‐efficiency oxygen ion transport paths are formed in the perovskite oxyfluoride, and lattice oxygen mobility and oxygen permeability are enhanced. The greater number of oxygen vacancies that were created after F − doping of SCNF at elevated temperature was confirmed by thermal expansion behavior analysis (Figure S17, Supporting Information) . Because of the excellent ability of F to attract electrons, the electronic conductivity of SCNF decreased, which was confirmed by electrical conductivity measurements (Figure S18, Supporting Information).…”

Substituent effects of Ba2+ for Sm3+ on the structure and electrochemical performances of Sm0.5Sr0.5Co0.8Fe0.2O3−δ cathode for intermediate temperature solid oxide fuel cells

“…At room temperature, the structure of Sm 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3Àd is orthorhombic with space group D 16 2h e pbnm [24]. As shown in Fig.…”

“…Partial substitution of cerium for cobalt in Sm 1Àx Sr x CoO 3Àd was shown to slightly suppress the lattice expansion, to decrease total conductivity, and to improve cathode performance. However, the cerium solubility limit is low, 5 mol% [24].Crystal structure, thermal expansion coefficient, electrical conductivity, and cathode polarization of Sm 0.5 Sr 0.5 Co 1Àx Fe x O 3Àd (SSCF) (0 x 0.9) series have also been studied. However, this substitution leads to an increase in the ASR of SSCF [25].…”