литий-ионный аккумулятор

УДК 544.6.018.4

DOI:  https://doi.org/10.18500/1608-4039-2016-16-4-155-195

DOI: https://doi.org/10.18500/1608-4039-2017-17-2-99-119

DOI: https://doi.org/10.18500/1608-4039-2017-17-4-235-248

DOI: https://doi.org/10.18500/1608-4039-2018-18-2-98-108

DOI: https://doi.org/10.18500/1608-4039-2018-18-2-51-76

DOI: https://doi.org/10.18500/1608-4039-2018-18-3-133-140

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.

The possibility of determining the charge state of lithium-sulfur batteries using the ANFIS model was estimated. Easily measurable in practice physical quantities were used as input parameters of the model. They are the battery voltage, the rate of its change and the number of previous cycles. The analysis of ANFIS models with various parameters (the number and type of membership functions) was carried out. It was shown that ANFIS is a model that makes it possible to estimate the charge state of a lithium-sulfur battery with the accuracy of more than 95%.

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.

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 Ti_{1 ? x}Mn_xO₂ solid solution and increased anatase unit cell volume from 136.41 A³ (undoped sample) to 137.25 A³ (Mn/Ti = 0.05). The conductivity of doped TiO₂ rises up to two orders in magnitude.