Characterization of Interaction between Fe‐Infiltrates and LSM Backbone in Solid Oxide Fuel Cells

Yu, Yang; Ohodnicki, Paul; Abernathy, Harry; Fan, Yueying; Kalapos, Thomas; Hackett, Gregory

doi:10.1002/pssa.201701044

Title: Characterization of Interaction between Fe‐Infiltrates and LSM Backbone in Solid Oxide Fuel Cells

Journal Article · Thu Apr 26 00:00:00 EDT 2018 · Physica Status Solidi. A, Applications and Materials Science

DOI:https://doi.org/10.1002/pssa.201701044· OSTI ID:1469241

Yu, Yang ^[1]; Ohodnicki, Paul ^[2]; Abernathy, Harry ^[3]; Fan, Yueying ^[3]; Kalapos, Thomas ^[1]; Hackett, Gregory ^[4]

U.S. DOE, National Energy Technology Laboratory 626 Cochrans Mill Rd Pittsburgh PA 15236 USA, AECOM 626 Cochrans Mill Rd Pittsburgh PA 15236 USA
U.S. DOE, National Energy Technology Laboratory 626 Cochrans Mill Rd Pittsburgh PA 15236 USA
U.S. DOE, National Energy Technology Laboratory 3610 Collins Ferry Rd Morgantown WV 26505 USA, AECOM 3610 Collins Ferry Rd Morgantown WV 26505 USA
U.S. DOE, National Energy Technology Laboratory 3610 Collins Ferry Rd Morgantown WV 26505 USA

In this paper, detailed materials characterization analyses on the interaction between FeO _x nanoparticles infiltrated onto a La _0.8 Sr _0.2 MnO ₃ (LSM) backbone cathode in a solid oxide fuel cell (SOFC) are reported. The infiltration process leads to an increase of 3.4% in cell performance. X‐ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM) as well as energy dispersive X‐ray spectroscopy (EDS) and electron energy loss spectroscopy (EELS) are utilized to perform a comprehensive examination of the microstructure and chemical properties at the interface of the infiltrate and backbone materials. Mn from the LSM backbone diffuses into the FeO _x infiltrate and forms a Fe‐Mn‐O spinel. A small amount of Fe also diffuses into the LSM backbone, which could partially be responsible for the enhanced performance of the cell. The valence state of Mn increases from the surface of the Fe‐Mn‐O particle into bulk LSM, with the highest value being at the interface of the Fe‐Mn‐O/LSM backbone. Possible mechanisms are discussed for the change in Mn valence state within the LSM phase. Trace amounts of Mn and La are found in the YSZ phase, as a result of interdiffusion between LSM and YSZ.

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Sponsoring Organization:: USDOE

OSTI ID:: 1469241

Journal Information:: Physica Status Solidi. A, Applications and Materials Science, Journal Name: Physica Status Solidi. A, Applications and Materials Science Vol. 215 Journal Issue: 17; ISSN 1862-6300

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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Cited by: 3 works

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