METHOD OF ADJUSTING SPECIFIC CAPACITY OF NEGATIVE ELECTRODE OF LITHIUM-ION ACCUMULATOR Russian patent published in 2017 - IPC H01M4/04 

FIELD: electricity.

SUBSTANCE: method for adjusting the specific capacity of the negative electrode of the lithium ion accumulator at a predetermined discharge current density comprises obtaining the batch of negative electrodes by the method of magnetron sputtering of silicon and aluminium targets of an active material of the elemental composition of Si-O-Al onto metallic foil, selecting one electrode as a control sample for determining its specific capacitance at a given discharge current density, wherein the control sample is divided into arbitrary portions, each portion is treated with the solution of hydrofluoric acid concentrated to 46-49% and water at the ratio of HF:H₂O=1:100 to HF: H₂O=1:1 by volume, the ratio between the specific capacity Q at a given discharge current density J and the processing time of the electrode is set τ, the reasonable electrode portion is determined by the achieved specific capacitance value Q₀ at the time value τ₀, the entire batch of the electrodes received is treated within the selected conditions.

EFFECT: invention allows to expand the range of adjusting the specific capacitance at a given discharge current density of the negative electrode.

3 cl, 1 dwg