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Structure-property relationship in Mg-doped La0.75Sr0.25Mn0.5Cr0.5O3 anode for solid oxide fuel cell

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Author(s)

Abul K. Azad, Firdaus Basheer, Pg M.Iskandar Petra, Abhijit Ghosh, John T.S. Irvine

School/Research organisations

Abstract

Lanthanum strontium chromium manganite (LSCM) has been found to be a potential candidate for SOFC anode to use in hydrocarbon fuels. Mg-doped LSCM has been synthesized by solid state reaction and tested for its sulphur tolerance when used as anode of solid oxide fuel cells. This material shows redox stability, compatibility with other cell components, acceptable level of cocking and sulphur tolerance. Structural studies using X-ray and neutron powder diffraction shows that the materials crystallize in the rhombohedral symmetry in the R-3C space group. Thermogravimetric analysis shows stable redox behaviour similar to LSCM. Microstructural analysis shows porous structure which is essential for an anode material. Performance of this material as an anode of SOFC has been tested in H2, CH4 and H2S/H2/CH4 atmosphere at different temperatures. Impedance analysis show that best performance can be achieved at about 870 °C corresponding to the polarization resistance of 0.5 ohm/cm2 in pure H2 and 1.0 ohm/cm2 in CH4. Microstructural analysis after cell preparations shows a good lamination between the electrolyte and anode.

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Details

Original languageEnglish
Publication statusPublished - 1 Jan 2014
Event5th Brunei International Conference on Engineering and Technology, BICET 2014 - Bandar Seri Begawan, Brunei Darussalam
Duration: 1 Nov 20143 Nov 2014

Conference

Conference5th Brunei International Conference on Engineering and Technology, BICET 2014
CountryBrunei Darussalam
CityBandar Seri Begawan
Period1/11/143/11/14

    Research areas

  • Alternative energy, Electrochemical characterization, Energy materials, Perovskites, Solid oxide fuel cell

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