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Article
Influence of Surface Modification of Layered Cathode Materials LiNixMnyCozO2 by NASICON Structure Nanoparticles on Their Electrochemical Characteristics
The dependence of the electrochemical characteristics of layered cathode materials LiNixMnyCozO2 (0.4 ≤ x ≤ 0.6; y = 0.2, 0.3; z = 0.2, 0.4) on the method of applying a protective layer of nanoparticles of lithiu...
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Article
Main Trends in the Development of Microwave Dielectric Materials for Cellular Communication Devices: A Review
The requirements for high-quality microwave (MW) dielectrics, which are used in the development of cellular communication devices (radio filters, solid-state generators, etc.) for the transition from 3G to 5G ...
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Article
An effective modification of LiNi0.6CO0.2Mn0.2O2 with Li1.3Al0.3Ti1.7(PO4)3 as a high-performance cathode material for Li-ion batteries
LiNi0.6Co0.2Mn0.2O2 (NMC 622) cathode material is widely used for lithium-ion batteries. The effect of the method of creating a protective layer of Li1.3Al0.3Ti1.7(PO4)3 (LATP) on the electrochemical characterist...
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Article
Anomalous Increase in Ionic Conductivity in Peo-Containing System Segmented Polyurethane – Segmented Oligourethane with LiClO4
A method of obtaining a solid polymer electrolyte for lithium-ion batteries based on polyethylene oxide-containing (PEO) supramolecularly organized system segmented polyurethane – segmented oligourethane with ...
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Article
Structural Stability of Dispersions of Magnetic Nanoparticles in Aqueous Solutions of Polysorbate-80
The structural features of aggregation in magnetic fluids based on solutions of the surfactant polysorbate-80 (tween-80) were investigated. Using small-angle X-ray and neutron scattering and dynamic light scat...
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Article
Influence of Solvent on Stability and Electrophysical Properties of Organic–Inorganic Perovskites Films CH3NH3PbI3
The influence of DMF and DMSO solvents on the properties of organic–inorganic perovskite films obtained at the ratio of starting reagents PbI2:CH3NH3I = 1:2 was studied. It was found that a dense film is formed f...
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Article
Preparation and Properties of Films of Organic-Inorganic Perovskites MAPbX3 (MA = CH3NH3; X = Cl, Br, I) for Solar Cells: A Review
The latest results in the field of design of and research on organic-inorganic perovskites are summarized. The influence of chemical and physical factors, in particular the ratio of starting reagents, such as ...
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Article
Structural Aspects of Fe3O4/CoFe2O4 Magnetic Nanoparticles According to X-Ray and Neutron Scattering
Structural aspects of powders containing magnetic nanoparticles Fe3O4/CoFe2O4 with the anticipated “core-shell” structure are considered by means of comparative analysis with individual particles of Fe3O4, CoFe2O
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Article
Magnetothermic Effect in Core/Shell Nanocomposite (La,Sr)MnO3/SiO2
Approaches have been developed for the creation of magnetic core/shell nanocomposites derived from (La,Sr)MnO3 and SiO2 with particle diameter 40-45 nm. SQUID magnetometry has shown that the presence of the SiO2 ...
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Article
Influence of Synthesis Conditions on the Morphology and Spectral-Luminescent Properties of Films of Organic-Inorganic Perovskite CH3NH3PbI2.98Cl0.02
The influence of the synthesis conditions (rotation speed used for spin-coating deposition of the film, film drying temperature, and the ratio of the PbI2 and CH3NH3I reactants in solutions) on the microstructure...
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Article
Effect of impurities on the electrical properties of the defect perovskite Li0.33La0.57TiO3
A perovskite phase with the composition Li0.33La0.57TiO3 modified with up to 7 wt % Bi2O3, SiO2, Li3PO4, or Li3BO3 has been prepared by solid-state reactions. The samples in the LLTO–Li3PO4, LLTO–Bi2O3, and LLTO–...
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Article
Open AccessSemi-oxalate synthesis of (1−x)BaTiO3−xM0.5Bi0.5TiO3 (M = Li, Na, K) PTCR materials
(1−x)BaTiO3–xM0.5Bi0.5TiO3 (M = Li, Na, K) solid solutions were prepared using BaTiO3 pre-synthesized by oxalate method. The stability limits of (1−x)BaTiO3–xLi0.5Bi0.5TiO3 solid solutions have been established. ...
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Article
Codo** of scandium-containing zirconia-based solid electrolytes with iron, cerium, and copper oxides
Codo** with iron, cerium, and copper oxides has been proposed as a means of improving the performance of scandium-containing zirconia-based solid electrolytes. We have examined three procedures for the synth...
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Article
Lithium–air cell with lanthanum–lithium titanate ceramic electrolyte
The La0.56Li0.33TiO3 ceramic with the structure of defect perovskite and high conductivity of (2-4) × 10–3 S cm–1 at the room temperature is obtained. Ceramic electrolyte based on La0.56Li0.33TiO3 is developed fo...
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Article
The effect of sol–gel preparation conditions on structural characteristics and magnetic properties of M-type barium hexaferrite thin films
We have shown the possibility to obtain M-type barium hexaferrite thin films with thickness of ~200–450 nm on the surface of dielectric α-Al2O3 substrates with low microwave dielectric loss (tan δ ~ 10−4 GHz) by ...
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Article
Phase composition of the ferrite catalyst with the spinel structure and its catalytic activity in the water—gas shift reaction of carbon monoxide
The ferrite catalyst with the spinel structure corresponding to the Mn0.5Co0.5Fe2O4 composition was synthesized. The iron cation distribution over sublattices in the spinel structure was elucidated by Mössbauer s...
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Article
Ionic and electronic conductivities of yttria- and scandia-stabilized zirconia
We report a study and comparative analysis of the medium-temperature (850–1000°C) ionic and total conductivities of zirconia stabilized by yttriaand scandia-based mixed oxides. Zirconia stabilized by combined ...
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Article
Synthesis and dielectric and nonlinear properties of BaTi1 − x Zr x O3 ceramics
We have studied the formation of BaTi1 − x Zr x O3 solid solutions with the perovskite structure. The phase composition, microstructure, and electrical properties...
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Article
Synthesis of thin-film electrodes based on LiPON and LiPON-LLTO-LiPON
Thin lithium-conducting amorphous films of lithium phosphorus oxynitride (LiPON) are synthesized by high-frequency (HF) magnetron sputtering. The effect of sputtering conditions (HF power, support temperature,...
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Article
Solid solutions based on iron-substituted cobaltites MnFe x Co2-x O4 in CO oxidation
The influence of the chemical composition and conditions of heat treatment of MnFe x Co2−x O4 system on its phase composition and catalytic properties in CO oxida...
