METHOD OF PRODUCING SUPERCAPACITOR BASED ON NANOSTRUCTURED CARBON MATERIAL Russian patent published in 2024 - IPC C01B32/318 B01J20/22 B82B1/00 H01G9/04 H01G9/42 B82B3/00 

FIELD: electricity.

SUBSTANCE: invention relates to a method of producing a supercapacitor with a double electric layer based on electrodes from nanostructured porous carbon materials obtained by activating raw material from biomass with orthophosphoric acid. Method is characterized by the fact that to obtain electrodes, a mixture consisting of a nanostructured porous carbon material, a binder additive – polytetrafluoroethylene, a conducting additive – carbon nanotubes is used, where the content is, wt.%: polytetrafluoroethylene 3–8, carbon nanotubes 1–12, the rest is nanostructured porous carbon material; wherein the nanostructured porous carbon material used has a microporous, or micromesoporous, or mesoporous structure with the following characteristics: BET specific surface area of 1,200–2,880 m²/g, QSDFT specific surface area of 1,010–2,160 m²/g, pore volume of 1.03–2.78 cm³/g, average pore size of 1.9–7.0 nm, volume fraction of mesopores 33–83%, bulk density 0.16–0.45 g/cm³, content of phosphorus in form of P-containing functional groups 0.5–5.0 wt.%; mixture is pressed with moulding, obtained electrodes are dried and impregnated with non-aqueous electrolyte solution with volume fraction of salt from 25 to 75%, the electrodes impregnated with the electrolyte solution are divided into two halves by a cellulose-based separator to form a cell containing two electrodes.

EFFECT: use of the proposed method enables to obtain an energy-efficient and stable supercapacitor.

5 cl, 18 ex