Wettability control of liquid electrolyte on cathodes for molten carbonate fuel cells

摘要

Bismuth oxide-based material, IVIIECs,coated cells slipped a significant performance increase, at low operating temperatures below 600 °C. The poor wetting property of the mixed ionic and electronic conductor (MIEG)*"coating, such as BYS (Bi_(1.5)Y_(0.3)Sm_(0.2)O_(3-□)) on the NiO cathode, to the liquid electrolyte creates openings where oxygen absorption and dissociation take place to provide more oxide ionic species to electrochemical reaction sites (ERSs). Therefore, poor wetting MIEC-coated cells showed a much higher power density compared to standard cells,with a factor of 1.4 at the low operating temperature of-550 °C.