LITHIUM-ION ACCUMULATOR Russian patent published in 2017 - IPC H01M10/525 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used in production of lithium-ion accumulators (LIA) and storage batteries on their basis intended for use as power accumulators for electric vehicles, alternative power engineering, uninterrupted power supply sources, power recovery systems and levelling network loads. In design of the proposed lithium-ion accumulator combined are: an active material of the negative electrode on the base Li₄Ti₅O₁₂ and an active material of the positive electrode on Li₃V₂(PO₄)₃. Active material of the negative electrode on the base Li₄Ti₅O₁₂ can be chromium-deposited on titanium positions and is a compound of the following composition Li₄Ti_5-xCr_xO₁₂, where 0<x≤0.2. Active material of the positive electrode can be sodium-deposited on lithium positions, with one or more metals from a group comprising magnesium, aluminium, yttrium and lanthanum on vanadium positions, fluorine or chlorine on phosphate positions, and is a compound of the following composition Li_3-xNa_xV_2-yM_y(PO₄)_3-zHal_z/C, where M is one or more metals from a group comprising Mg, Al, Y, La; G=F, Cl; 0<x≤0.1; 0<y≤0.2; 0<z≤0.16. Crystals of active materials of the negative and the positive electrodes can be coated with a surface layer of carbon, which is obtained due to introduction of into a mixture of initial reagents of a carbon-containing precursor – starch.

EFFECT: invention allows to create a design of high-capacity LIA with higher power safety and stability during cycling.

5 cl, 4 dwg