Effects of using (La0.8Sr0.2)0.95Fe0.6Mn0.3Co0.1O3 (LSFMC), LaNi0.6Fe0.4O3−δ (LNF) and LaNi0.6Co0.4O3−δ (LNC) as contact materials on solid oxide fuel cells

Abstract

Three lanthanum-based perovskite ceramic compounds as contact materials, (La 0.8 Sr 0.2) 0.95 Fe 0.6 Mn 0.3 Co 0.1 O 3 (LSFMC), LaNi 0.6 Fe 0.4 O 3- (LNF) and LaNi 0.6 Co 0.4 O 3- (LNC), were coated on Crofer22APU interconnect and then, La 0.6 Sr 0.4 FeO 3 (LSF) cathode was deposited on each of contact layers, using in both contact coating is applied between Crofer22APU and LSF cathode without compromising the contact resistance of the system.

Metallic/Ceramic (Fe-22Cr mesh/ LaNi0.6Fe0.4O3-δ) Composite as Contact Material for SOFCs

“…Such a TEC mismatch will probably result in detachment of the contact coating under long-term SOFC operation conditions. Consequently, LNF has been selected for this study, since it shows more comparable TEC values to those reported for the alloy [10].…”

Scalable synthetic method for SOFC compounds

“…Crofer-22APU interconnector has been included for a better TEC comparison between the adjacent compounds of MCF10 and NiO-YSZ. This material is the one that was analyzed as interconnect material for this kind of SOFC synthesis by the research group [21,23].…”

“…The commonly used materials for fuel cell devices are porous cermets of metallic NiO-(ZrO 2 avoiding poorly conducting secondary phases which increases contact resistance of the system [17][18][19][20]. Earlier studies have concluded that the use of LaNi 0.6 Fe 0.4 O 3 (LNF60) cathode contact layers improves electrons transfer through the contact interface from interconnect to active cathode layer [21,22]. Also, MnCo 1.9 Fe 0.1 O 4 (MCF10) can be used as an interconnect protective coating to avoid the Cr poisoning to the cathode [23,24].…”

Interaction of SrTi0.65Fe0.35O3-δ with LaNi0.6Fe0.4O3-δ, La0.6Sr0.4Co0.2Fe0.8O3-δ and Ce0.8Gd0.2O2-δ

“…La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ (LSCF), it has drawn much attention thanks to promising electrode properties and ability to control magnitude and ratio of ionic and electronic conductivity [4]. However, the STF cathodes may require a separate current collector layer, such as LaNi 0.6 Fe 0.4 O 3-δ (LNF), which exhibits sufficient electronic conductivity and moderate chromium poisoning resistance [5]. On the other hand, SrTi 0.65 Fe 0.35 O 3-δ shows almost no conductivity temperature dependence between 600 °C and 800 °C and significant oxygen partial pressure dependence which promotes it as a high temperature, resistive oxygen sensor [6].…”