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Enhancement of oxygen surface exchange on epitaxial La0.6Sr0.4Co0.2Fe0.8O3-δ thin films using advanced heterostructured oxide interface engineering

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Abstract

Engineering of a novel heterostructured oxide interface was used to enhance the oxygen surface exchange kinetics of La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF113) thin films. A single-layer decoration of mixed (LaSr)2CoO4±δ (LSC214) and La1-xSrxCoO3-δ (LSC113) and a double-layer decoration of stacked LSC214 and LSC113 grown on the LSCF113 markedly enhanced the surface exchange coefficients of the LSCF113 by up to -1.5 orders of magnitude relative to the undecorated LSCF113. It is hypothesized that two different types of surface decorations can enable Sr segregation at the interface and surfaces of LSC113 and LSC214, leading to enhancement of the oxygen surface exchange kinetics of decorated LSCF113.

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Acknowledgments

This work was supported by the Department of Energy (DOE), National Energy Technology Laboratory (NETL), Solid State Energy Conversion Alliance (SECA) Core Technology Program (Funding Opportunity Number DEFE0009435) and the Skoltech-MIT Center for Electrochemical Energy. The PLD and XRD performed were conducted at the Center for Nanophase Materials Sciences, which is sponsored at Oak Ridge National Laboratory by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy, and computations in this work were also benefited from the use of the National Energy Research Scientific Computing Center allocation of the Center for Nanophase Materials Sciences at Oak Ridge National Laboratory, both under grant number CNMS2013-292.

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Authors and Affiliations

  1. Electrochemical Energy Laboratory, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA

    Dongkyu Lee

  2. Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 MA Avenue, Cambridge, MA, 02139, USA

    Dongkyu Lee

  3. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA

    Dongkyu Lee

  4. 77 Massachusetts Avenue, Cambridge, MA, 02139, USA

    Yueh-Lin Lee & Xiao Renshaw Wang

  5. Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 MA Avenue, Cambridge, MA, 02139, USA

    Yueh-Lin Lee & Xiao Renshaw Wang

  6. Department of Materials Science and Engineering, University of Wisconsin-Madison, 1509 University Avenue, Madison, Wl, 53706, USA

    Dane Morgan

  7. Electrochemical Energy Laboratory, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA

    Yang Shao-Horn

  8. Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 MA Avenue, Cambridge, MA, 02139, USA

    Yang Shao-Horn

  9. Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA

    Yang Shao-Horn

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  1. Dongkyu Lee
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Correspondence to Yang Shao-Horn.

Enhancement of oxygen surface exchange on epitaxial La0.6Sr0.4Co0.2Fe0.8O3-δ thin films using advanced heterostructured oxide interface engineering

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The supplementary material for this article can be found at http://dx.doi.org/10.1557/mrc.2016.28

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Lee, D., Lee, YL., Wang, X.R. et al. Enhancement of oxygen surface exchange on epitaxial La0.6Sr0.4Co0.2Fe0.8O3-δ thin films using advanced heterostructured oxide interface engineering. MRS Communications 6, 204–209 (2016). https://doi.org/10.1557/mrc.2016.28

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