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Catalysis and oxidation of carbon in a hybrid direct carbon fuel cell

Research output: Contribution to journalArticle

Author(s)

Cairong Jiang, John T.S. Irvine

School/Research organisations

Abstract

The hybrid direct carbon fuel cell (HDCFC), combining molten carbonate fuel cell and solid oxide fuel cell technology, is capable of converting solid carbon directly into electrical energy without intermediate reforming. Here, we report the investigation of the HDCFC with yttria stabilized zirconia (YSZ) electrolyte, NiO-YSZ anode and lanthanum strontium manganite (LSM) cathode using the eutectic mixture of 62 mol% Li2CO3 and 38 mol% K2CO3. An open circuit voltage (OCV) of 0.71 V at 800 °C is recorded without the carbonate which increases to 1.15-1.23 V in the presence of the carbonate at the same temperature. In addition, the cell's OCV is enhanced not only by the thermal history but also by the carbonate, which is in excess of 1.57 V after the high temperature treatment. Electrochemical performance analysis indicates a suitable amount of the carbonate enhanced the carbon oxidation. With 1 mm robust thick electrolyte and commercial carbon, the cell (1.13 cm2 active area) generates the peak density of 50 mW cm-2 at 800 °C. There are significant losses from electrolyte resistance, which would be overcome by the application of a thinner electrolyte.
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Original languageEnglish
Pages (from-to)7318-7322
JournalJournal of Power Sources
Volume196
Early online date19 Nov 2010
DOIs
Publication statusPublished - 2011
Event European Solid Oxide Fuel Cell Forum 2010 - Lucerne, Switzerland
Duration: 29 Jun 20102 Jul 2010

    Research areas

  • Thermal history, Power density, Open circuit voltage, Molten carbonate content, Hybrid direct carbon fuel cell

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