Electrochemical properties of mixed conducting La{sub 1{minus}x}M{sub x}Co{sub 1{minus}y}Fe{sub y}O{sub 3{minus}{delta}} (M = Sr,Ca,Ba) perovskites

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At elevated temperatures, some ABO{sub 3} perovskite type oxides having Co and Fe as B site cations exhibit substantial mixed (anionic and electronic) conductivity. Because of this behavior, they are candidate materials for applications such as solid oxide fuel cell cathodes and oxygen separation membranes. The purpose of the present study is to increase the understanding of the effects of composition, temperature, and environment on the electrochemical properties of selected materials within the La{sub 1{minus}x}M{sub x}Co{sub 1{minus}y}Fe{sub y}O{sub 3{minus}{delta}} (M=Sr,Ca,Ba) system in order to evaluate their applicability for the above-mentioned applications. Characterization techniques include XRD, SEM, TGA, dc conductivity, dilatometry, ... continued below

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3 p.

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Stevenson, J.W.; Armstrong, T.R.; Pederson, L.R. & Weber, W.J. October 1, 1995.

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  • Pacific Northwest Laboratory
    Publisher Info: Pacific Northwest Lab., Richland, WA (United States)
    Place of Publication: Richland, Washington

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At elevated temperatures, some ABO{sub 3} perovskite type oxides having Co and Fe as B site cations exhibit substantial mixed (anionic and electronic) conductivity. Because of this behavior, they are candidate materials for applications such as solid oxide fuel cell cathodes and oxygen separation membranes. The purpose of the present study is to increase the understanding of the effects of composition, temperature, and environment on the electrochemical properties of selected materials within the La{sub 1{minus}x}M{sub x}Co{sub 1{minus}y}Fe{sub y}O{sub 3{minus}{delta}} (M=Sr,Ca,Ba) system in order to evaluate their applicability for the above-mentioned applications. Characterization techniques include XRD, SEM, TGA, dc conductivity, dilatometry, oxygen permeation measurements, and iodometric titration.

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3 p.

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OSTI as DE96002482

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  • 188. meeting of the Electrochemical Society, Chicago, IL (United States), 8-13 Oct 1995

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  • Other: DE96002482
  • Report No.: PNL-SA--26300
  • Report No.: CONF-951007--9
  • Grant Number: AC06-76RL01830
  • Office of Scientific & Technical Information Report Number: 161518
  • Archival Resource Key: ark:/67531/metadc624239

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  • October 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • April 7, 2016, 6:17 p.m.

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Stevenson, J.W.; Armstrong, T.R.; Pederson, L.R. & Weber, W.J. Electrochemical properties of mixed conducting La{sub 1{minus}x}M{sub x}Co{sub 1{minus}y}Fe{sub y}O{sub 3{minus}{delta}} (M = Sr,Ca,Ba) perovskites, article, October 1, 1995; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc624239/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.