-
Article
Surface Degradation of Lithium–Manganese Spinel in Contact with Lithium-Hexafluorophosphate-Containing Electrolyte Solution
A set of computational and experimental methods is used in the study of chemical side interactions in the LiMn2O4-based lithium-ion cathodic half-cell over the 25–60°C temperature range. The degradation of LiMn2O
-
Article
Electrochemical Properties of Superionic Conductors CsAg4Br3 – хI2 + х
Solid solutions CsAg4Br3 – хI2 + х (x = 0.38; 0.50; 0.68) are prepared by solid-state synthesis; the single phase of the products is confirmed using the methods of X-ray diffraction and differential scanning calo...
-
Article
Thermodynamics of Interaction between Poly(perfluorosulfonic acid) Nafion and Water
The thermodynamics of interaction between poly(perfluorosulfonic acid) Nafion and water is studied by isothermal sorption and microcalorimetry. The concentration dependences of energy and entropy parameters of...
-
Article
Polymer Electrolytes Based on the Lithium Form of Nafion Sulfonic Cation-Exchange Membranes: Current State of Research and Prospects for Use in Electrochemical Power Sources
The review analyzes and summarizes the results of investgations of lithium-conducting polymer electrolytes obtained via ion exchange from the initial H+ form of perfluorinated sulfonic cation-exchange membranes o...
-
Article
Algorithm for Theoretical Assessment of the Electrochemical Stability of Electrolytes in Lithium-Ion Batteries by the Example of LiBF4 in the EC/DMC Mixture
The resistance of electrolytes to oxidative decomposition on the positive electrode surface is one of barriers that complicate the development of rechargeable batteries with the high energy density. The electr...
-
Article
Synthesis and Comparative Investigation of the Electrochemical Characteristics of CsAg4Br2.5I2.5 and RbAg4I5 Solid Electrolytes
A new method for the solid-phase synthesis of the superionic conductor CsAg4Br2.5I2.5 is proposed, which facilitates the preparation of a single-phase product. The thermal behavior of CsAg4Br2.5I2.5 in the temper...
-
Article
The Effect of the Lithium Borate Surface Layer on the Electrochemical Properties of the Lithium-Ion Battery Positive Electrode Material LiNi1/3Mn1/3Co1/3O2
The electrochemical behavior of layer-structure LiNi1/3Mn1/3Сo1/3O2 solid solution, a positive electrode material of lithium-ion battery, with surface protective layer of amorphous lithium borate is studied. The ...
-
Article
Conductivity of Lithium-Conducting Nafion Membranes Plasticized by Binary and Ternary Mixtures in the Sulfolan–Ethylene Carbonate–Diglyme System
The electrotransport characteristics of the polymer electrolyte based on lithiated Nafion-115 membrane plasticized by high-boiling dipolar aprotic solvents—sulfolane (SL), ethylene carbonate (EC), and diglyme ...
-
Article
Phase Diagram of Ethylene Carbonate–Sulfolane System
Phase equilibria in the ethylene carbonate (EC)–sulfolane (SL) binary system were investigated using differential scanning calorimetry in a temperature range from –150 to +50°C to construct a phase diagram of ...
-
Article
Silicon-Reduced Graphene Oxide Composite as Negative Electrode of Li-Ion Batteries
Two types of treatment of the initial mechanical mixture [silicon nanopowder and graphene oxide (GO)] for obtaining Si/RGO nanocomposites were used: reduction in hydrazine vapor and heat treatment at 550°C in ...
-
Article
Quantum-Chemical and IR Spectroscopic Study of Ionic Association in Solutions of LiCF3SO3 in Acetonitrile
The association of ions in solutions of lithium trifluoromethanesulfonate in acetonitrile is studied via quantum chemistry and Fourier-transform infrared spectroscopy (FT-IR). Quantum-chemical calculations ar...
-
Article
Solid polymer electrolytes in a poly(butadiene-acrylonitrile)–LiBr system
Poly(nitriles) are among the polymer matrices providing high salt solubility and, in some cases, superionic lithium conductivity at ambient temperatures observed in highly concentrated solvent-free polymer ele...
-
Article
New lithium salts in electrolytes for lithium-ion batteries (Review)
The properties of electrolyte systems based on standard nonaqueous solvent composed of a mixture of dialkyl and alkylene carbonates and new commercially available lithium salts potentially capable of being an ...
-
Article
Influence of heterovalent substitution in the titanium sublattice on the electrochemical intercalation of lithium in M y Ti1–y Se2 (M = Cr, V))
The influence of heterovalent substitutions Ti–V and Ti–Cr on the electrochemical intercalation of lithium into titanium diselenide has been investigated. It has been found that both types of do** insignific...
-
Article
IR spectroscopic and quantum-chemical investigation of perchlorate anion solvation in acetonitrile
The solvation of anions in solutions of tetrabutylammonium perchlorates in acetonitrile is studied by means of quantum-chemical calculations and Fourier-transform infrared spectroscopy. It is shown that perchl...
-
Article
Shift of the Fermi level during cointercalation of copper and iron into TiSe2
The influence of copper intercalation into the TiSe2 compound on the Fermi energy has been investigated using two independent methods. The first method is based on the analysis of the amplitude of the deformation...
-
Article
Separation of cationic and anionic conductivity constituents in solid polymer electrolytes comprising a copolymer of acrylonitrile and butadiene (40:60) and lithium hexafluoroarsenate
A technique for separating cationic and anionic constituents of the ionic conductivity of amorphous solid polymer electrolytes in the region of low salt concentrations is proposed. The technique employs model ...
-
Article
Ionic-electronic conduction in the polybutadiene-cobalt(II) chloride system
-
Article
Ionic Transport in Dilute Solid Polymer Electrolytes with Amorphous Structure
The ionic structure and transport properties of amorphous solid polymer electrolytes in the system copolymer of acrylonitrile and butadiene (40 : 60)—lithium hexafluoroarsenate (SPE) is studied in the region o...
-
Article
Quantum-Chemical Investigation of Ionic Association of Lithium Salts LiXF6 (X = As, P)
The possibility of formation of various ion clusters for lithium salts LiXF6 (X = As, P) is studied. The dynamic matrix of the clusters in a gas phase is calculated by numerical and analytical differentiation of ...
