ACTIVE MATERIAL FOR SODIUM ACCUMULATOR POSITIVE ELECTRODE AND METHOD OF ITS MANUFACTURING Russian patent published in 2015 - IPC H01M4/58 H01M10/54 H01M4/04 

FIELD: electricity.

SUBSTANCE: invention is referred to active material for positive electrode of sodium accumulator having crystal structure belonging to spatial group Pn2₁a represented by the general formula Na_xM_y(AO₄)_z(P₂O₇)_w (1), where M represents at least one of elements selected from the group consisting of manganese, iron, cobalt and nickel; A represents at least one of elements selected from the group consisting of silicon, phosphorus or sulphur; x meets the condition 4≥x≥2; y meets the condition 4≥y≥1, and both indices z and w are bigger or equal to 1. The invention is also referred to material manufacturing method.

EFFECT: material has high operating voltage and may be charged and discharged at high voltage.

13 cl, 4 tbl, 12 ex, 16 dwg