A new cathode for reduced-temperature molten carbonate fuel cells

Title
A new cathode for reduced-temperature molten carbonate fuel cells
Authors
Hoang Viet Phuc Nguyen강민구함형철최선희한종희남석우홍성안윤성필
Keywords
molten carbonate fuel cells; wettability; MIEC coated cell; cathode
Issue Date
2014-10
Publisher
Journal of the Electrochemical Society
Citation
VOL 161, NO 14, F1458-F1467
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/48942
ISSN
00134651
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KIST Publication > Article
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