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A kind of high-voltage flexible solid-state supercapacitor and preparation method thereof

A supercapacitor, high-voltage technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, hybrid capacitor electrolytes, etc., can solve problems such as liquid electrolyte leakage, to avoid hidden dangers of liquid leakage, high-strength mechanical properties, and improve The effect of energy density

Active Publication Date: 2019-10-29
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, for flexible and bendable devices, multiple bending during the use of the device will cause leakage of liquid electrolyte
However, there are no reports of flexible supercapacitors based on high-voltage ionic liquid gels.

Method used

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  • A kind of high-voltage flexible solid-state supercapacitor and preparation method thereof
  • A kind of high-voltage flexible solid-state supercapacitor and preparation method thereof
  • A kind of high-voltage flexible solid-state supercapacitor and preparation method thereof

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Experimental program
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Effect test

preparation example Construction

[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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Abstract

The invention relates to a high-voltage flexible solid super capacitor and a preparation method thereof. The super capacitor comprises a gel electrolyte film, flexible current collectors, electrodes and packaging layers, the surfaces of the flexible current collectors are coated with the electrodes to form flexible electrode slices respectively, one packaging layer, one flexible electrode slice, the gel electrolyte film, the other flexible electrode slice and the other packaging layer are stacked successively, and the packaging layers wrap the flexible electrode slice, the gel electrolyte filmand the other flexible electrode slice. Active electrode materials and the flexible electrode slices are prepared, ion gel is prepared and casted into the film, one flexible electrode slice, the gelfilm and the other electrode slice are stacked sequentially, and the flexible electrode slice, the gel electrolyte film and the other flexible electrode slice are packaged by thermoplastic high-molecular films to form the high-voltage flexible solid super capacitor.

Description

technical field [0001] The invention relates to a supercapacitor and a preparation method thereof. Background technique [0002] With the continuous emergence of wearable and flexible smart devices, the development of small, light, flexible and rollable energy storage devices has become a research area that everyone is paying close attention to. Supercapacitor is an electrochemical energy storage device with high power, high safety, wide temperature range and long cycle life. Flexible supercapacitors refer to flexible energy storage devices that can still work in the state of bending, twisting or even stretching, especially suitable for wearable devices. At present, the energy density of supercapacitors is still not ideal, generally 5-10Wh / Kg, which limits their further engineering applications. [0003] According to the energy density formula of supercapacitor E=1 / 2CU 2 , it can be seen that its energy density mainly depends on the capacitance C and the voltage U. At pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/56H01G11/36H01G11/84
CPCH01G11/36H01G11/56H01G11/84Y02E60/13
Inventor 王凯马衍伟
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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