METHOD TO PRODUCE POSITIVE ELECTRODE OF LITHIUM-ION ACCUMULATOR AND LITHIUM-ION ACCUMULATOR Russian patent published in 2014 - IPC H01M4/131 H01M10/52 

FIELD: electricity.

SUBSTANCE: at the stage of realisation of the method on a conducting substrate by the method of magnetron dispersion of a vanadium target in plasma of oxygen and argon at the oxygen/argon ratio 0.01-0.06 by partial pressure, without forced heating of the metal substrate, they produce a textured film, having within its composition vanadium oxides VO_1+x, V₃O₇, V₂O₅ at different ratio, and at the second stage they expose it to subsequent baking in the oxygen-containing medium at 400-500°C for 10-120 min, to produce high vanadium oxides V₆O₁₃, V₃O₇, VO₂, V₂O₅ in the film in polycrystalline phase. A lithium-ion accumulator includes a thin-film positive electrode on the basis of films of vanadium oxides, having a crystalline structure, produced by the proposed method, a negative electrode, electrolyte and separator.

EFFECT: increased electric specific capacity.

2 cl, 8 dwg, 3 ex