A new cathode for reduced-temperature molten carbonate fuel cells
- A new cathode for reduced-temperature molten carbonate fuel cells
- Hoang Viet Phuc Nguyen; 강민구; 함형철; 최선희; 한종희; 남석우; 홍성안; 윤성필
- molten carbonate fuel cells; wettability; MIEC coated cell; cathode
- Issue Date
- Journal of the Electrochemical Society
- VOL 161, NO 14, F1458-F1467
- Oxygen solubility is the rate-determining step (RDS) for the reduction reaction on the cathodes of molten carbonate fuel cells (MCFCs), especially at low operating temperatures below 600°C. The poor wetting property of the mixed ionic and electronic conductor (MIEC) coating, such as BYS (Bi1.5Y0.3Sm0.2O3-δ) 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. Long-term operation of 2500 hours with a low voltage loss of 9 mV suggests that BYS is a promising alternative cathode material for molten carbonate fuel cells.
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