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Issue 5, 2015
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Solid oxide fuel cells fueled with reduced Fe/Ti oxide

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Abstract

For the first time, a Fe–Ti–O containing pellet, a viable chemical looping particle, was used as a solid fuel for direct contact with the Ni/YSZ anode surface of a solid oxide fuel cell. A maximum power density of 97 mW cm−2, corresponding to 84% of that in the H2 fuel, was produced using Fe–Ti–O in an inert Ar gas environment at 750 °C. The Fe–Ti–O pellets were able to generate stable electricity under repeated electrochemical oxidation and hydrogen reduction cycles. Temperature-programmed oxidation–reduction coupled with infrared spectroscopic studies revealed that the oxidation of the Fe–Ti–O pellet followed a shrinking core model; the reduction followed a progressive-conversion model. The ability of the Fe–Ti–O pellet to generate electricity on the Ni/YSZ surface can be attributed to its low resistivity (<17 Ω cm) which allows electrons to transport from the electrochemical oxidation sites to the anode surface. This study demonstrates that coupling a SOFC with an external reducer using Fe–Ti–O, an oxygen carrier, is a good candidate for electricity generation.

Graphical abstract: Solid oxide fuel cells fueled with reduced Fe/Ti oxide

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Publication details

The article was received on 18 Sep 2014, accepted on 01 Dec 2014 and first published on 01 Dec 2014


Article type: Paper
DOI: 10.1039/C4TA04905E
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Citation: J. Mater. Chem. A, 2015,3, 2242-2250
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    Solid oxide fuel cells fueled with reduced Fe/Ti oxide

    J. Mirzababaei, L. Fan and S. S. C. Chuang, J. Mater. Chem. A, 2015, 3, 2242
    DOI: 10.1039/C4TA04905E

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