Improved performance of molten carbonate fuel cells with (Li/Na)2CO3 electrolytes by using BYS coated cathode at low operating temperatures

Title
Improved performance of molten carbonate fuel cells with (Li/Na)2CO3 electrolytes by using BYS coated cathode at low operating temperatures
Authors
윤성필한종희함형철강민구Chang-Whan LeeByeong Wan KwonYoung Jin KimMin Chul Lee
Keywords
Wettability; Molten carbonate fuel cell (MCFC); Cathode; BYS
Issue Date
2017-07
Publisher
International journal of hydrogen energy
Citation
VOL 42, NO 29-18523
Abstract
In order to improve the stack life time of MCFCs, it is necessary to reduce the operating temperature of MCFCs below 600 degrees C, because reduced operating temperature minimizes electrolyte loss due to evaporation and corrosion. However, at the low operating temperature below 600 degrees C, the cell performance of MCFCs with (Li/Na)(2)CO3 electrolyte is too low to operate the fuel cell stack and system. In this study, we have performed wettability control of the liquid molten carbonate electrolyte by coating NiO cathodes with poor wetting property of the mixed ionic and electronic conductor (MIEC) such as BYS (Bi1.5Y0.3Sm0.3O3-delta). From experiments with symmetrical cells, each polarization component with various temperatures and gas conditions were studied. To investigate effects of the BYS coated cathode on the performance of MCFCs, a 100 cm(2) single cell of MCFCs was employed. The performance of a 100 cm(2) single cell with BYS coated cathode was better than that with conventional cathode by a factor of 1.84, because BYS coated cathode reduces activation polarization and mass transfer resistance greatly.
URI
http://pubs.kist.re.kr/handle/201004/66788
ISSN
0360-3199
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KIST Publication > Article
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