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

Chang Whan Lee, Byeong Wan Kwon, Min Goo Kang, Hyung Chul Ham, Sung Pil Yoon, Jonghee Han, Young Jin Kim, Min Chul Lee

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

In order to improve the stack life time of MCFCs, it is necessary to reduce the operating temperature of MCFCs below 600 °C, because reduced operating temperature minimizes electrolyte loss due to evaporation and corrosion. However, at the low operating temperature below 600 °C, the cell performance of MCFCs with (Li/Na)2CO3 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-δ). 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 cm2 single cell of MCFCs was employed. The performance of a 100 cm2 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.

Original languageEnglish
Pages (from-to)18514-18523
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume42
Issue number29
DOIs
Publication statusPublished - 2017 Jul 20

Keywords

  • BYS
  • Cathode
  • Molten carbonate fuel cell (MCFC)
  • Wettability

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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