A new cathode for reduced-temperature molten carbonate fuel cells

Hoang Viet Phuc Nguyen, Min Goo Kang, Hyung Chul Ham, Sun Hee Choi, Jonghee Han, Suk Woo Nam, Seong Ahn Hong, Sung Pil Yoon

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

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 providemore 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.

Original languageEnglish
Pages (from-to)F1458-F1467
JournalJournal of the Electrochemical Society
Volume161
Issue number14
DOIs
Publication statusPublished - 2014

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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