ELECTRODE MASS, ELECTRODE COMPOSITE MATERIAL, METHOD OF ITS PRODUCTION AND ITS USE IN METAL-ION ACCUMULATORS Russian patent published in 2020 - IPC H01M4/04 H01M4/13 H01M4/1391 H01M10/52 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and specifically to a method of producing a composite material in form of an active ingredient powder based on complex oxides, silicates, phosphates, oxophosphates and fluoride phosphates of transition metals and alkali metals with carbon coating and can be used for production of metal-ion batteries. Method involves application of carbon coating in several stages, at that, coated material is mixed with powder of polyacrylonitrile with subsequent addition of plasticiser, which is then removed by solvent or evaporation, after which the plastic mass is annealed in an inert atmosphere. Disclosed method of producing carbon composites improves stability of operation of electrode materials under conditions of high loads and severe operating conditions due to reduction of electrode polarization at high current densities. As a result of coating application on electrode / electrolyte boundary layer of carbon material is formed, which prevents dissolution of active electrode composite material in contact with electrolyte, and minimizes the formation of electrolyte decomposition products, which prevent charge transfer.

EFFECT: technical result of invention is increase of specific power consumption of electrode composite material and cyclicity of accumulator.

17 cl, 12 dwg, 19 ex