Lithium electrochemical systems

Vanadium-Doped Bronze Titanium Dioxide as Anode Material for Lithium-ion Batteries with Enchanced Cycleability and Rate Performance

Nanotubes of bronze titanium dioxide (TiO2(B)) doped with vanadium were synthesized through hydrothermal reaction. The obtained material possesses mesoporous structure and large specific surface area of 180 m2/g. It was found that the incorporation of vanadium into TiO2(B) lattice increases the volume of a unit cell. Additionally, the conductivity rose up to three orders of magnitude for doped titanium dioxide reaching the value of 1.70 ⋅ 10 − 8 S/cm.

Methods of Preliminary Analysis of Noise Signal Measured on Electrochemical Systems

The study relates to the general problem of noise research in electrochemistry. The special issue of recognition of a weak signal against the background of equipment noise was considered . Chemical power sources were used as an object. The measurement results were analyzed using a standard model including the noise voltage and noise current of the equipment. The criterion of correctness of the model was compliance with the quadratic law of addition of components of a random noise signal.

Automation of Data Processing of Electrochemical Studies of Battery Cells

The paper considers the problem of increasing the information content of studies of electrochemical battery cells due to in-depth processing of the obtained experimental data. The necessity of developing software with a wider functionality compared to the standard software of battery testers and allowing the processing of experimental data obtained from different types of battery testers in a single interface is substantiated.

Electrochemical System of LiTi₂(PO₄)₃ | 1 M Aqueous Li₂SO₄ | LiFePO₄ and Prototypes of the Lithium-Ion Battery Based on it

The use of aqueous electrolyte in lithium-ion energy storage systems can choose some of the problems associated with the use of electrolytes based on organic solvents, such as a risk of ignition of an abnormal violation of tightness and the sensitivity of operational parameters to production conditions.

The Prospects of Use of the Fast-Tempered Materials in Current Sources

For the purpose of creation of a reliable current conductor for fluorocarbon-lithium cell with use of the fast-tempered materials the corrosion and electrochemical behavior of microcrystalline AV-86 alloy and also amorphous Ni81P19 and Fe70Cr10P13C7 alloys in electrolytes on a basis γ-butyrolactone (GBL) is studied. The high corrosion resistance and conductivity of amorphous materials do perspective their use as current conductor of current sources.

Degradation Mechanism of Electrodes from Sodium Titanate at Cycling

Degradation of Na2Ti3O7-based electrodes is studied by galvanostatic as well as electrochemical impedance spectroscopy methods. The rate of degradation was shown to decrease from cycle to cycle as the cycling progresses and also as the cycling current increases. It was concluded that the main reason of degradation is the gradual an electrolyte reduction with the formation of insoluble products (SEI).

Manganese-Doped Titanium Dioxide with Improved Electrochemical Performance for Lithium-Ion Batteries

Within the work, an influence of manganese dopant on electrochemical performance of anatase titanium dioxide (Mn/Ti = 0.05; 0.1; 0.2) had been investigated. It was established that incorporation of Mn3+ into the TiO2 lattice results in the formation of Ti1 − xMnxO2 solid solution and increased anatase unit cell volume from 136.41 Å3 (undoped sample) to 137.25 Å3 (Mn/Ti = 0.05). The conductivity of doped TiO2 rises up to two orders in magnitude.

High-voltage Cathode Material Based on LiCoVO₄ for Lithium-Ion Battery: Development and Research

This paper discusses the prospects for developing a cathode material based on the cobalt(II)-lithium vanadate(V) (LiCoVO4) for a lithium-ion battery, an approach to its preparation and features of the electrochemical behavior.

Synthesis and Electrochemical Properties of Lithium-Accumulating Electrode Material Based on Li₂MnSiO₄

Synthesis of electrode material based on Li2MnSiO4/С using widely used, environmentally safe and inexpensive Li, Si and Mn-containing precursors was considered. Mechanochemical activation was used for improving the flow of thesolid-state synthetic process and providing the necessary reactivity to obtain the target product with a high content of the main lithium-accumulating compound.Structural and morphological features of the composite were investigated by X-ray diffraction, laser diffraction granulometry.

Peculiarities of Obtaining and Electrochemical Properties of Lithium-Ion Battery Cathode Materials Based on Iron(II)-Lithium Orthosilicate

Various strategies for the synthesis of promising electrode materials for lithium-ion battery (LIB) based on iron(II)-lithium orthosilicate (Li2FeSiO4) using widely distributed, environmentally friendly and inexpensive starting materials are considered. The materials obtained are multicomponent electroactive composites that include, in addition to the main lithium accumulating component, also auxiliary structure-forming and electrically conductive components based on the products of the pyrolytic decomposition of organic compounds.