The effect of oxygen and water vapor partial pressures on the total conductivity of BaCe0.7Zr0.1Y0.2O3–δ

Ionics - The effect of oxygen and water vapor partial pressure on the total conductivity of the proton-conducting BaCe0.7Zr0.1Y0.2O3–δ material is investigated in the present work....     

Doped (Nd,Ba)FeO3 oxides as potential electrodes for symmetrically designed protonic ceramic electrochemical cells

Journal of Solid State Electrochemistry - The design of new electrode materials with high redox stability has great potential for the fabrication of solid oxide fuel and electrolysis cells having a...     

Transport properties of iron-doped BaZr0.9Yb0.1O3–δ

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A high-temperature electrochemical sensor based on CaZr0.95Sc0.05O3–δ for humidity analysis in oxidation atmospheres

Journal of Solid State Electrochemistry - A way of in situ water vapor partial pressure determination in oxidizing atmospheres and high temperatures is proposed in this work, utilizing a new and...     

Ceramic and Transport Characteristics of Electrolytes Based on Mg-Doped LaYO<Subscript>3</Subscript>

Effect of magnesium on the sinterability, phase composition, microstructure, and transport properties of proton-conducting materials of composition LaY_1–xMg_xO_3–δ (х = 0, 0.05, 0.1) was studied. Ceramic samples were obtained by using the citrate-nitrate synthesis method at various sintering temperatures (1250–1400°C). It was shown that, for the samples with x = 0.05 and 0.1, the relative density was no less than 95% at a sintering temperature of 1350°C, whereas undoped lanthanum nitrate has this density at 1450°C. An X-ray diffraction analysis and scanning electron microscopy demonstrated that introduction of a small amount of magnesium (x = 0.05) is sufficient for forming the single-phase and high-dense ceramics. Electrical conductivity data show that the LaY_0.95Mg_0.05O_3–δ sample has high overall and ionic conductivities.     

Functionality of Lanthanum,Neodymium, and Praseodymium Nickelates as Promising Electrode Systems for Proton-Conducting Electrolytes

Results obtained in synthesis and certification of new materials based on Ba-doped Ln₂NiO_4+δ as possible electrode candidates for electrochemical devices with solid-oxide proton-conducting electrolytes are presented. Single-phase materials of composition Ln_1.95Ba_0.05NiO_4+δ (Ln = La, Nd, and Pr) were obtained by using the citrate-nitrate synthesis method, and their thermomechanical, electrical, and electrochemical functionality was examined with the use of the dilatometric method, four-probe dc measurements, and electrochemical impedance spectroscopy, respectively. An integrated analysis of the data obtained shows that the highest electrical transport properties, which compare well with modern results, were reached for the Pr-containing nickelite. At the same time, this nickelite has an increased thermal expansion coefficient, which exceeds by ~20% that for the electrolyte material. These characteristics can be optimized by creating composite materials based on Pr_1.95Ba_0.05NiO_4+δ with a small fraction of the electrolyte component.