Copper doped lanthanum strontium ferrite for reduced temperature solid oxide fuel cells

Coffey, Greg W.

doi:10.1016/j.ssi.2004.09.015

Cited by 49 publications

(20 citation statements)

References 13 publications

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“…At nominal Cu concentrations higher than 20 mol%, secondary phases such as (La 8-x Sr x )Cu 6 Fe 2 O 20 were determined by XRD. The concen- tration of secondary phases increases with increase in Cu content [11,[14][15][16].…”

Section: Impact Of Temperature Treatment On Perovskite Formationmentioning

confidence: 99%

Influence of A‐Site Variation and B‐Site Substitution on the Physical Properties of (La,Sr)FeO₃Based Perovskites

et al. 2009

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Perovskite‐type materials have been synthesised and investigated with regards to their physical properties including specific surface area (BET), phase purity, sinter behaviour, coefficient of thermal expansion (CTE) and electrical conductivity. We investigated the effect of Sr variation on La1–xSrxFeO3–δ the influence of A‐site stoichiometry on (La0.8Sr0.2)yFeO3–δ and the impact of substitution of iron by nickel or copper up to 20 mol%. The over‐stoichiometric compositions indicate secondary phases independent of the calcination temperature. Stoichiometric and understoichiometric compositions become single phase perovskites after calcination at 1,200 °C. The substitution of Fe by Ni or Cu on the B‐site, (La0.2Sr0.8)0.95Ni/CuxFe1–xO3, is viable, but limited to 20 mol%. Cu substitution and under‐stoichiometry lower the melting point and thus consequently influence the sintering temperature.The diverse LSF composition as well as Ni/Cu substitutions affects the CTE. The CTE matches quite well with YSZ, by a 15% A‐site deficiency, as well as with Ni substitution on the B‐site. Compatibility tests at 1,000 °C prove that Ni increases the reactivity of LSF with YSZ. In case of the CGO, no indication of reactions or interdiffusion could be observed. The substitution of iron by 20 mol% nickel or copper significantly enhances the electrical conductivity of the basic composition (La0.8Sr0.2)0.95FeO3–δ.

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Section: Impact Of Temperature Treatment On Perovskite Formationmentioning

confidence: 99%

Influence of A‐Site Variation and B‐Site Substitution on the Physical Properties of (La,Sr)FeO₃Based Perovskites

et al. 2009

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“…Thus, the conductivities of La 0. 8 Pr 0.8 Sr 0.2 FeO 3 À y at 1073 K are $ 110 S/cm [5] and 78 S/cm [6], respectively, which are much lower in comparison with La 0.8 Sr 0.2 CoO 3 À y (1300 S/cm at 1073 K [7]) and Pr 0.85 Sr 0.15 CoO 3 À y ( $ 1100 S/cm at 973 K [8]), however, high enough for use as cathode materials in SOFCs. The much lower price for Fe oxides than for Co, Mn and Ni ones, makes ferrates prospective cathode materials in SOFCs [9].…”

Section: Introductionmentioning

confidence: 98%

Synthesis and characterization of perovskite-type SrxY1−xFeO3−δ (0.63≤x<1.0) and Sr0.75Y0.25Fe1−yMyO3−δ (M=Cr, Mn, Ni), (y=0.2, 0.33, 0.5)

Biendicho

Shafeie

Frenck

et al. 2013

Journal of Solid State Chemistry

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“…For intermediate‐temperature SOFC, cathode research efforts in recent years have mostly focused on the use of mixed ionically‐electronically conducting (MIEC) cathode materials such as doped lanthanum ferrites and composite CeO 2 ‐lanthanum ferrites 44–45 . Copper doping (up to 20%) in the lanthanum ferrite has been studied 46 and found to reduce the ASR (∼0.12 ω°cm 2 ). Bi‐layered engineered electrode architecture, developed through computational design analysis, has indicated the electrode performance approaching 3.1 A/cm 2 at 0.078 V 47 .…”

Section: Cathodesmentioning

confidence: 99%

Solid Oxide Fuel Cells: Technology Status

Singh

Minh²

2004

Int J Applied Ceramic Tech

195

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In its most common configuration, a solid oxide fuel cell (SOFC) uses an oxygen‐ion conducting ceramic electrolyte membrane, perovskite cathode, and nickel cermet anode electrode. Cells operate in the 600–1000°C temperature range and utilize metallic or ceramic current collectors for cell‐to‐cell interconnection. Recent developments in engineered electrode architectures, component materials chemistry, cell and stack designs, and fabrication processes have led to significant improvements in the electrical performance and performance stability as well as reduction in the operating temperature of such cells. Large kW‐size power‐generation systems have been designed and field demonstrated. This paper reviews the status of SOFC power‐generation systems with emphasis on cell and stack component materials, electrode reactions, materials reactions, and corrosion processes.

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Copper doped lanthanum strontium ferrite for reduced temperature solid oxide fuel cells

Cited by 49 publications

References 13 publications

Influence of A‐Site Variation and B‐Site Substitution on the Physical Properties of (La,Sr)FeO₃Based Perovskites

Influence of A‐Site Variation and B‐Site Substitution on the Physical Properties of (La,Sr)FeO₃Based Perovskites

Synthesis and characterization of perovskite-type SrxY1−xFeO3−δ (0.63≤x<1.0) and Sr0.75Y0.25Fe1−yMyO3−δ (M=Cr, Mn, Ni), (y=0.2, 0.33, 0.5)

Solid Oxide Fuel Cells: Technology Status

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Copper doped lanthanum strontium ferrite for reduced temperature solid oxide fuel cells

Cited by 49 publications

References 13 publications

Influence of A‐Site Variation and B‐Site Substitution on the Physical Properties of (La,Sr)FeO3Based Perovskites

Influence of A‐Site Variation and B‐Site Substitution on the Physical Properties of (La,Sr)FeO3Based Perovskites

Synthesis and characterization of perovskite-type SrxY1−xFeO3−δ (0.63≤x<1.0) and Sr0.75Y0.25Fe1−yMyO3−δ (M=Cr, Mn, Ni), (y=0.2, 0.33, 0.5)

Solid Oxide Fuel Cells: Technology Status

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Influence of A‐Site Variation and B‐Site Substitution on the Physical Properties of (La,Sr)FeO₃Based Perovskites

Influence of A‐Site Variation and B‐Site Substitution on the Physical Properties of (La,Sr)FeO₃Based Perovskites