METHOD OF PRODUCING FLEXIBLE ANODE MATERIAL BASED ON MODIFIED CARBON FABRIC Russian patent published in 2024 - IPC C25B11/04 C25D5/18 C25D11/00 H01M4/52 

FIELD: technical electrochemistry.

SUBSTANCE: invention relates to technical electrochemistry and specifically to production of flexible anode materials based on carbon fabric modified with metal oxides and polymers used in metal-ion batteries, particularly in lithium-ion batteries. Method includes preliminary heat treatment of carbon fabric surface at 300 °C for 2 hours in an air atmosphere with subsequent modification of the surface of the working electrode from carbon fabric with tungsten oxides and the subsequent formation of a coating based on transition metal oxides and a polymer from an electrolyte during polarization with alternating asymmetric current with an average current density of 0.66–0.80 A/dm² at temperature of 65–70 °C and electrolysis time in range of 20–30 minutes. Electrolyte contains components at the following ratio, g⋅l^-1: ammonium heptamolybdate ((NH₄)₆Mo₇O₂₄⋅4H₂O) 20.0–40.0, cobalt sulphate (CoSO₄⋅7H₂O) 80.0–100.0, iron sulphate (FeSO₄⋅7H₂O) 8.0–10.0, nickel sulphate (NiSO₄⋅7H₂O) 20.0–30.0, cobalt chloride (CoCl₂⋅6H₂O) 10.0–14.0, citric acid (C₆H₈O₇) 2.0–4.0, boric acid (H₃BO₃) 20.0–30.0, polyacrylic acid (C₂H₃COOH)_n 0.02–0.08.

EFFECT: higher specific surface area of carbon fabric due to heat treatment and simultaneous deposition of metal oxides and polyacrylic acid on surface of carbon fabric.

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