Structural and impedance analysis of copper doped LSM cathode for IT-SOFCs

The influence of large cations on the electrochemical properties of tunnel-structured metal oxides

“…The origin of the improved electronic conductivity of α-MnO 2 containing K + can be attributed to the electron hopping between heterovalent Mn pairs (Mn 3+ /Mn 4+ ) induced by K + doping 35 36 . Increasing the cation content will produce more regions inside the nanowire with mixed Mn 3+ /Mn 4+ valence states, resulting in higher electronic conductivity 37 .…”

Synthesis, characterization and synergistic photocatalytic properties of yeast-assisted composite La0.7Sr0.3MnO3/TiO2

“…15 Furthermore, La 1Àx Sr x MnO 3 materials also show good electrical and catalytic properties, so they are always used as multifunctional materials. For example, they have been applied as cathode materials in solid oxide fuel cells, [16][17][18] and used as catalysts in the degradation of NO 19 and MO. 14 Due to the narrow band gap, La 1Àx Sr x -MnO 3Àd could exhibit good photocatalytic activity under solar light irradiation, 20 and TiO 2 displays excellent photocatalytic activities under UV irradiation.…”

Recent advances, practical challenges, and perspectives of intermediate temperature solid oxide fuel cell cathodes

“…In addition to LSCF perovskites, several other La-containing compositions have been developed using A or B-site dopants such as Ba, 58,59 Cu, 60–67 Ni, 68,69 Mo, 70 and Ca 71,72 demonstrating a range of properties summarized in Table 2. A series of La 1− x Ba x Co 0.2 Fe 0.8 O 3− δ (LBCF) compositions have been investigated for application in IT-SOFC cathodes showing lower electrical conductivities than their LSCF counterparts, 58,59 with a maximum value of 100 S cm −1 in the temperature range of RT-1000 °C for La 0.6 Ba 0.4 Co 0.2 Fe 0.8 O 3− δ .…”

“…58 However, the main advantage of this family is their high resistance to Cr poisoning and good polarization performance stability compared to conventional LSM and LSCF cathodes. 73 Cu-doped compositions such as La 0.6 Sr 0.4 Co 1− y Cu y O 3− δ , 60 La 1− y Sr y Mn 1− x Cu x O 3− δ , 61,64 and La x Sr 1− x Fe 1− y Cu y O 3− δ 62,63,65,66,74 have been investigated. Specifically, Co-free compositions with Cu have attracted much attention due to the decreased cost and TEC and sufficient catalytic activity.…”

“…122 Table 2 summarizes the properties of different LSCF compositions along with other perovskite-type SOFC cathodes. 15,28,59,61–72,74,76–78,80–82,84,86,92–97,99–104,106–108,122,124,125,127,129–131,136–143…”