ELECTRODE MATERIAL FOR SODIUM-ION BATTERIES, METHOD OF ITS PRODUCTION, ELECTRODE AND BATTERY BASED ON THE ELECTRODE MATERIAL Russian patent published in 2021 - IPC H01M4/48 H01M4/52 H01M10/54 

FIELD: electrode materials.

SUBSTANCE: invention relates to electrode materials based on phosphates, oxophosphates and fluoride phosphates of transition metals and sodium, it can be used for the production of sodium-ion batteries. Compounds with the general formula NaMPO₄(F_1-xO_x) are taken as the active electrode material for sodium-ion batteries, and compounds with the general formula NaMPO₄(F_1-xO_x)/C are taken as the active electrode composite material for sodium-ion batteries, where M is the transition metal, V, Ti, Cr, Mn, Fe and their mixtures; 0≤x≤1. These electrode materials are obtained by two-stage synthesis; they have a small change in the volume of particles during the charge-discharge process, which makes it possible to cycle the electrode material for more than 1000 cycles.

EFFECT: technical result of the invention is an increase in the specific capacity, speed and stability of battery cycling.

10 cl, 2 tbl, 14 ex, 10 dwg