Ni/C Slurries Based on Molten Carbonates as a Fuel for Hybrid Direct Carbon Fuel Cells

Yuta Nabae*, Kevin D. Pointon, John T. S. Irvine

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

78 Citations (Scopus)


Ni-impregnated carbon black (Ni/XC-72R) was tested as a fuel for a hybrid direct carbon fuel cell (HDCFC) with a hybrid electrolyte of yttria-stabilized zirconia and molten carbonate (Li(2)CO(3)/K(2)CO(3)). The open-circuit voltage (OCV) of the HDCFC with Ni/XC-72R was quite high, about 1.5 V at 700 degrees C. The maximum power density was improved by factors of 7.6 and 3.1, respectively, at 550 and 700 degrees C by adding 50 wt % of Ni catalyst. The effect of the Ni catalyst on the carbon/carbonate slurry was investigated by temperature-programmed decomposition. The Ni catalyst probably contributes to the high OCV by enhancing the reverse Boudouard reaction (C+CO(2)-> 2CO) in the carbon/carbonate slurry in the HDCFC.

Original languageEnglish
Pages (from-to)B716-B720
Number of pages5
JournalJournal of The Electrochemical Society
Issue number6
Publication statusPublished - 2009


  • electrochemical electrodes
  • molten carbonate fuel cells
  • electrolytes
  • catalysts
  • electrochemistry
  • zirconium compounds
  • decomposition
  • carbon
  • lithium compounds
  • nickel
  • potassium compounds
  • yttrium compounds


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