Properties of a new type of cathode for molten carbonate fuel cells

Seung Taek Kuk, Young Seck Song, Keon Kim

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

The solubility of a nickel oxide cathode in molten carbonate fuel cell (MCFC) electrolyte is one of the major technical obstacles to the commercialization of such fuel cells. Lithium cobalt oxide, LiCoO 2, has been selected as a candidate material for MCFC cathodes because its solubility is small and the rate of dissolution into the melt is slower than that for nickel oxide. On the other hand, the electrical conductivity of LiCoO 2 is lower than that of nickel oxide. Thus, nickel oxide has been coated with stable LiCoO 2 in carbonate by a PVA-assisted sol-gel method to give a LiCoO 2-coated NiO (LC-NiO) cathode. Raman spectra show that the structure of LC-NiO is different from that of nickel oxide, and that a LiCo 1-yNi yO 2 phase is formed during heat-treatment of the LC-NiO cathode. The coating of LiCoO 2 on NiO electrode increases with increase in the dipping and heating times. The performance of unit cells show that the mean voltage of the cells is 0.80 V using a NiO cathode and 0.85 V with a LC-NiO cathode at a current density of 150 mA cm -2. The solubility of the LC-NiO cathode in molten carbonate electrolyte is half that of NiO cathode after 300 h at 650°C.

Original languageEnglish
Pages (from-to)50-56
Number of pages7
JournalJournal of Power Sources
Volume83
Issue number1-2
Publication statusPublished - 1999 Oct 1

Keywords

  • Fuel cell
  • LiCoO -coated NiO cathode
  • Lithium cobalt oxide
  • PVA-assisted sol-gel

ASJC Scopus subject areas

  • Electrochemistry
  • Fuel Technology
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Properties of a new type of cathode for molten carbonate fuel cells'. Together they form a unique fingerprint.

  • Cite this