METHOD OF ACTIVATION OF CARBON MATERIAL FROM VISCOSE FIBERS FOR OBTAINING ELECTRODES OF SUPERCONDENSERS Russian patent published in 2017 - IPC H01G11/34 B82Y30/00 

FIELD: electricity.

SUBSTANCE: method comprises two stages, the first stage carries out the impregnation of the fibers with 5% solution of orthophosphoric acid on a water bath, drying the fibers in a ventilation hood, placing one part of the impregnated fibers in a high-temperature quartz reactor placed in a muffle furnace, pyrolysis implementation in an argon stream at a rate of 800 ml/min, while the muffle furnace is heated at a rate of 5°/min up to 900°C, disable argon and the fibers are kept at a temperature of 900°C for 40 minutes in the CO₂ stream at a rate of 800 ml/min, then turn off CO₂ and cooling the fibers in an argon stream up to room temperature to produce a carbon material; on the second stage, the resulting carbon material is placed in a high-temperature quartz reactor perpendicular to the argon flow and the other part of the viscose fibers is placed in a low-temperature quartz reactor located in the second muffle furnace, wherein the reactors are connected in series with each other with one input for argon and one output for the used gases, heating the high-temperature quartz reactor with carbon material up to 700°C at a rate of 10°/min in argon flow at a rate of 200 ml/min, the low-temperature quartz reactor is switched off, when the high-temperature quartz reactor reaches a predetermined temperature, a low-temperature quartz reactor is switched on and heated to 400°C at a rate of 5°/min in argon stream at a rate of 200 ml/min, and the high-temperature quartz reactor stand at a temperature of 700°C, while the blowing of the carbon material is carried out in addition to argon by the off-gases which were formed as a result of the pyrolysis of viscose fibers on the first stage and then the resulting carbon material is cooled in both furnaces in argon stream.

EFFECT: increase in the area of the active surface of the carbon material and increase in the specific capacitance of the supercondenser.

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