Chromium deposition and poisoning of cathodes of solid oxide fuel cells – A review

Role of graphene on hierarchical flower-like NiAl layered double hydroxide-nickel foam-graphene as binder-free electrode for high-rate hybrid supercapacitor

“…4d. The tested cycle number and current density 14 are similar to the conditions of the NiAl-LDH electrodes tested in other studies 19,24,[32][33][34]44 . For 15 both electrodes, a significant increase in specific capacity was observed up to the 400th cycle, 19 .…”

Evolution of the electrochemical interface in high-temperature fuel cells and electrolysers

“…The most studied example is chromium poisoning on the air electrode side arising from interconnect materials and even in gas phase from steel housing. This subject has been comprehensively reviewed 38 although the nature of the process has not been fully resolved. A highly likely model involves electrochemical deposition of CrOx impurities at the 3PB, Figure 4b, however the possibility of chemical deposition cannot be fully discounted.…”

“…A highly likely model involves electrochemical deposition of CrOx impurities at the 3PB, Figure 4b, however the possibility of chemical deposition cannot be fully discounted. Jiang has also recently proposed a nucleation model that suggests that surface A-site enrichment is a key factor in initiating the Cr deposition 38 .…”

Degradation of (La0.6Sr0.4)0.95(Co0.2Fe0.8)O3−δ Solid Oxide Fuel Cell Cathodes at the Nanometer Scale and below

“…Sources of Cr species can also come from stainless steel components found in the balance-of-plant (BoP) such as heat exchangers 2 . This poisoning has been found to lead to rapid electrochemical performance degradation of the cathodes [3][4][5][6] , including (La,Sr)(Co,Fe)O3-δ (LSCF) perovskite oxides, which are considered to be a promising cathode material for ITSOFCs due to their significantly higher electrochemical activity for the O 2 reduction reaction and higher oxygen ion conductivity than the conventional (La,Sr)MnO 3 (LSM) cathode 7 .…”