High-voltage flexible solid super capacitor and preparation method thereof
A supercapacitor, high-voltage technology, used in the manufacture of hybrid/electric double-layer capacitors, hybrid capacitor electrodes, hybrid capacitor electrolytes, etc., can solve problems such as liquid electrolyte leakage, avoid leakage hazards, improve energy density, and simplify packaging. The effect of craftsmanship
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[0054] The steps of the preparation method of the present invention are as follows:
[0055] 1) Preparation of electrode active materials: Commercial carbon nanotubes or synthetic graphene-based porous carbon nanomaterials are used as electrode active materials.
[0056] The process of synthesizing graphene-based porous carbon nanomaterials is as follows: the natural graphite is oxidized to graphite oxide by the Hummers method, and an aqueous solution of graphene oxide is prepared by ultrasonic dispersion and exfoliation of a probe. Then add conductive polymer monomer, dopant and oxidant ammonium persulfate to the graphene oxide aqueous solution, and stir and react for 1-48 hours at a temperature of -10°C to 25°C to obtain a graphene oxide-conductive polymer composite material and washed dry. Grind and mix the above-mentioned graphene oxide-conductive polymer composite material and potassium hydroxide in a ratio of 2:1 to 1:8, put it into a tube furnace and activate it by cal...
Embodiment 1
[0078] 1) Preparation of electrode active materials
[0079] The natural graphite was oxidized to graphite oxide by the Hummers method, and a graphene oxide aqueous solution was prepared by probe ultrasonic dispersion and exfoliation. Then add 0.05molL to the graphene oxide aqueous solution -1 Aniline, 1mol L -1 of perchloric acid and 0.05molL -1 Ammonium persulfate, at a temperature of -10°C, stirred and reacted for 24 hours to obtain a graphene oxide-polyaniline composite material and washed and dried, such as image 3 shown.
[0080] Grind and mix the above compound and potassium hydroxide in a ratio of 1:4, put it into a tube furnace and calcinate to 700°C for activation under an argon atmosphere, then wash and dry with dilute hydrochloric acid at room temperature to obtain graphene-based porous carbon nano materials such as Figure 4 shown.
[0081] 2) Preparation of flexible electrode sheets
[0082] The above-mentioned graphene-based porous carbon nanomaterial is...
Embodiment 2
[0087] 1) Preparation of electrode active materials
[0088] The natural graphite was oxidized to graphite oxide by the Hummers method, and a graphene oxide aqueous solution was prepared by probe ultrasonic dispersion and exfoliation. Then add 0.005molL to the graphene oxide aqueous solution -1Ethylenedioxythiophene, 0.02molL -1 of camphorsulfonic acid and 0.005molL -1 Ammonium persulfate was stirred and reacted for 48 hours at a temperature of 0° C. to obtain a graphene oxide-polyethylenedioxythiophene composite material, which was washed and dried. Grind and mix the above compound and potassium hydroxide at a ratio of 1:8, put it into a tube furnace and calcinate to 700°C for activation under an argon atmosphere, then wash and dry with dilute hydrochloric acid at room temperature to obtain graphene-based porous carbon Composite nanomaterials;
[0089] 2) Preparation of flexible electrode sheets
[0090] With the above-mentioned graphene-based porous material as the acti...
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