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Article
Electrochemical behavior of perovskite-type Ce1−xCaxVO3 under reducing conditions
The incorporation of calcium into the zircon-type lattice of Ce1−xCaxVO4 (x = 0.2–0.4), stable at atmospheric oxygen pressure, leads to a modest decrease in the unit cell volume and electrical conductivity, predo...
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Article
Mixed Ionic-Electronic Conductivity of the Fluorite-Type Ce1 – x – yLaxPryO2 – δ Solid Solutions under Reducing Conditions
The electrical conductivity of fluorite-type Ce1 – x – yLaxPryO2 – δ (x = 0.29–0.40, y = 0–0.14) solid solutions was studied over the oxygen partial pressure range from 10–20 to 0.5 atm at 973–1223 K. The (Сe,La)...
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Article
Ionic transport in (La,Sr)CoO3-δ ceramics
Increasing Sr2+ concentration and the creation of A-site deficiency in La1-x-ySrxCoO3-δ (x = 0.3–0.7, y = 0–0.05) increase oxygen ionic conductivity, oxygen permeability of the dense ceramic membranes, and surfac...
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Article
Electrochemical Behavior of (Fe,Ni)Ox-Based Anodes for Solid-Oxide Fuel Cells in Methane-Containing Atmospheres
The work is devoted to investigation of the electrochemical behavior of (Fe,Ni)Ox-based composite anodes in the hydrogen- and methane-containing fuel. Among the studied composites, the optimum electrochemical cha...
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Article
The Mixed Electronic and Ionic Conductivity of Perovskite-Like Ba1 –xSrxFe1 –yTiyO3 – δ and BaTi0.5Fe0.5 –zCezO3 – δ Solid Solutions
The work is focused on the studying of structural peculiarities, electronic and ionic conductivity, and thermomechanical properties of perovskite-like compositions in Ba1 –xSrxFe1 –yTiyO3 – δ and BaTi0.5Fe0.5 –zC...
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Article
Stability and Functional Properties of Fluorite-Like Ce0.6 –xLa0.4PrxO2 – δ as Electrode Components for Solid Oxide Fuel Cells
In order to evaluate applicability of Ce0.6 –хLa0.4PrхO2 – δ (x = 0–0.2) fluorites for protective interlayers and electrode components for intermediate-temperature solid oxide fuel cells (SOFCs), their thermal ex...
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Article
Electrical Conductivity, Thermal Expansion and Electrochemical Properties of Perovskites PrBaFe2–xNi x O5 + δ
In order to evaluate applicability of mixed-conducting PrBaFe2–xNi x О5 + δ perovskites for cathodes of solid oxide fuel cells (SOFCs), their crystal structure, thermal and chemi...
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Article
Oxygen Nonstoichiometry and Transport Properties of Mixed-Conducting Ce0.6–xLa0.4Pr x O2–δ
The oxygen nonstoichiometry and electrical conductivity of fluorite-type solid solutions Ce0.6‒xLa0.4Pr x O2–δ (x = 0.1–0.2) were studied in the oxygen partial pressure range 10–...
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Article
Redox Behavior and Transport Properties of Composites Based on (Fe,Ni)3O4 ± δ for Anodes of Solid Oxide Fuel Cells
The Fe–Ni–O system designed for producing bimetal-containing composite anodes of solid oxide fuel cells (SOFCs) was studied. The solubility of nickel in the structure of spinel (Fe,Ni)3O4 ± δ at atmospheric oxyge...
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Article
Transport and Electrochemical Properties of SrFe(Al,Mo)O3–δ
In this work, effects of molybdenum do** on the crystal structure, stability, electrical conductivity, oxygen permeability and thermomechanical properties of Sr(Fe,Al)O3–δ-based perovskites, were studied. The e...
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Article
Defect formation, ordering, and transport in SrFe1–x Si x O3–δ (x = 0.05–0.20)
Oxygen nonstoichiometry of perovskite-like SrFe1–x Si x O3–δ (x = 0.05–0.20), studied by thermogravimetric analysis and coulometric titration in ...
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Article
Grain-boundary states in solid oxide electrolyte ceramics processed using iron oxide sintering aids: a Mössbauer spectroscopy study
In order to appraise microstructure-determined defect formation processes and minor intergranular states in the solid electrolyte materials sintered employing transition metal oxide additives, the transmission...
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Article
Regularities of high-temperature oxidation of current collectors of solid oxide fuel cells due to diffusion processes in subsurface regions
A complex study of regularities of oxidative reactions is carried out in subsurface layers of current collectors of solid oxide fuel cells manufactured of Crofer 22APU or Crofer 22H stainless steel. The method...
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Article
Kinetics of NiO reduction and morphological changes in composite anodes of solid oxide fuel cells: Estimate using Raman scattering technique
The kinetics of nickel reduction and morphological changes in Ni–10Sc1CeSZ composite anodes in intermediate-temperature solid oxide fuel cells (SOFC) are studied using the Raman spectroscopy technique with the...
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Article
Electrophysical and thermomechanical properties of perovskites La0.5A0.5Mn0.5Ti0.5O3–δ (A = Ca, Sr, Ba) used as fuel cell anodes: the effect of radius of alkali-earth cation
The effect of the radius of the alkali-earth cation substituted into the A sublattice of La0.5A0.5Mn0.5Ti0.5O3–δ (А = Са, Sr, Ba) perovskites on their stability and transport and thermomechanical properties is co...
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Article
Stability, mixed conductivity, and thermomechanical properties of perovskite materials for fuel cell electrodes based on La0.5A0.5Mn0.5Ti0.5O3–δ, La0.5Ba0.5Ti0.5Fe0.5O3–δ, and (La0.5А0.5)0.95Cr0.5Fe0.5O3–δ (A = Ca, Ba)
For materials based on ferrites and manganites with Са2+ and Ва2+ cations substituted into А sublattice, the functional properties are studied and the prospects as electrode materials for solid-oxide fuel cells a...
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Article
Ion transport in dual-phase SrFe1−xТаxO3−δ (x = 0.03 − 0.10): effects of redox cycling
The incorporation of tantalum cations in mixed-conducting SrFe1-xTaxO3−δ (x = 0.03 − 0.10) results in the formation of single cubic perovskite-like phases in oxidizing atmospheres while under red...
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Article
Stability and functional properties of Sr0.7Ce0.3MnO3 − δ as cathode material for solid oxide fuel cells
Studies of oxygen diffusion, interphase exchange, specific electric conductivity, and thermal expansion showed that perovskite-like Sr0.7Ce0.3MnO3 − δ (SCMO) as a potential cathode material for solid oxide fuel c...
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Article
Synthesis and properties of fuel cell anodes based on (La0.5 + x Sr0.5 − x )1 − y Mn0.5Ti0.5O3 − δ (x = 0–0.25, y = 0–0.03)
Results are presented of studying electrochemical properties of perovskite-like solid solutions (La0.5 + x Sr0.5 − x )1 − y Mn0.5Ti0.5O3 − δ (x = 0–0.25, y = 0–0.03...
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Article
Analysis of electric properties of ZrO2-Y2O3 single crystals using teraherz IR and impedance spectroscopy techniques
The data obtained by impedance spectroscopy (1 Hz to 32 MHz) and broad-band dielectric spectroscopy (30 GHz-150 THz) are presented for crystals based on zirconia doped by 1.5–30 mol % Y2O3 or 10 mol % Sc2O3 and 1...