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Self-supporting flexible composite electrode film, preparation method and application thereof

A self-supporting electrode and composite electrode technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, etc., achieves the effects of low cost, improved rate performance, and simple preparation process.

Active Publication Date: 2016-08-24
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of self-supporting vanadium nitride-two-dimensional carbon nanomaterial composite flexible electrode film and its application in solid-state flexible supercapacitors have not been reported so far.

Method used

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  • Self-supporting flexible composite electrode film, preparation method and application thereof
  • Self-supporting flexible composite electrode film, preparation method and application thereof
  • Self-supporting flexible composite electrode film, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The steps for preparing the flexible self-supporting composite electrode film described in the technical solution of the present invention are as follows:

[0039] 1) Vanadium pentoxide nanowires: Add 0.6g of ammonium metavanadate and 1g of P123 into 50mL of water, add hydrochloric acid to adjust its pH value to 2, stir at room temperature for 12 hours to completely dissolve in water, and form an orange-red precursor body solution. Then transfer to a reaction kettle and react at 120° C. for 24 hours. After cooling, an khaki suspension was obtained. Centrifuge and wash three times with deionized water, and then put it into a vacuum drying oven to dry at 80° C. for 24 hours. Obtain dry vanadium pentoxide nanowire solid powder. Its scanning electron microscope pictures are as figure 1 As shown, the diameter distribution range of vanadium pentoxide nanowires is 10-50 nm.

[0040]2) Preparation of porous vanadium nitride nanowires by high-temperature ammonification: 200...

Embodiment 2

[0045] According to the method of Example 1, a composite electrode based on vanadium nitride porous nanowire-nanographite sheet was prepared. The difference is step 4) the process of mixing and dispersing the solution: adding 100 mg of vanadium nitride porous nanowires to 50 mL of 0.5 mg / mL graphite nanosheet dispersion solution, and adding 75 mg of NaDBS to help it disperse. Sonicate in a water bath for 10 minutes to fully dissolve the surfactant, then place it in a probe sonicator, and sonicate for 60 minutes at a power of 200W to form a black mixed dispersion solution.

[0046] 5) Vanadium nitride porous nanowire-nanographite sheet composite electrode film: select nylon filter membrane (Φ35mm, 0.4 micron pore size), take 25mL mixed dispersion liquid and put it into the solvent filter where the filter membrane is placed for vacuum filtration, and water and ethanol Rinse three times to remove surfactant. After taking it off, dry it in the air to obtain a circular vanadium ni...

Embodiment 3

[0048] According to the method of Example 1, a composite electrode based on vanadium nitride porous nanowire-nanographite sheet was prepared. The difference is step 4) the process of mixing and dispersing the solution: adding 25 mg of vanadium nitride porous nanowires to 50 mL of 0.5 mg / mL graphite nanosheet dispersion solution, and adding 50 mg of NaDBS to help it disperse. Sonicate in a water bath for 10 minutes to fully dissolve the surfactant, then place it in a probe sonicator, and sonicate for 60 minutes at a power of 200W to form a black mixed dispersion solution.

[0049] 5) Vanadium nitride porous nanowire-nanographite sheet composite electrode film: select nylon filter membrane (Φ35mm, 0.4 micron pore size), take 25mL mixed dispersion liquid and put it into the solvent filter where the filter membrane is placed for vacuum filtration, and water and ethanol Rinse three times to remove surfactant. After taking it off, dry it in the air to obtain a circular vanadium nit...

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Abstract

The invention relates to a self-supporting flexible composite electrode film, a preparation method and application thereof. The film is made from a vanadium-nitride porous nano wire and a nano graphite flake material; and the two materials are interwoven mutually on a micro level to form an interpenetration network structure. The preparation method of the film comprises: a vanadic anhydride nano wire is prepared and high-temperature ammonification is carried out on the vanadic anhydride nano wire to prepare vanadium-nitride porous nano wire; a dispersion solution of a nano graphite flake is prepared; the vanadium-nitride porous nano wire is added into the dispersion solution of the nano graphite flake and then a surfactant is also added, and a mixed dispersion solution is prepared under the ultrasonic effect; and then a self-supporting flexible composite film is prepared. The prepared self-supporting flexible composite film can be used as an electrode to prepare a solid flexible super capacitor. The preparation process is simple; and electrochemical performances like the capacity and multiplying power are excellent and the anti-bending flexibility is high.

Description

technical field [0001] The invention relates to a self-supporting flexible composite electrode film, a preparation method and application thereof, and belongs to the technical field of energy storage materials and devices. Background technique [0002] At present, with the continuous emergence of various wearable electronic devices, the development of portable energy storage devices (batteries or capacitors) that are small in size, thin in thickness, light in weight, and mechanically flexible has become an important technical requirement. Supercapacitor, also known as electrochemical capacitor, is a new type of energy storage device with the advantages of high power density (fast charge and discharge), wide temperature range and long cycle life. Flexible supercapacitors are especially suitable as energy supply elements for wearable electronic devices because they can keep working under repeated bending and twisting. [0003] The performance of supercapacitors is mainly dete...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/24H01G11/36H01G11/86
CPCY02E60/13H01G11/30H01G11/24H01G11/36H01G11/86
Inventor 张旋颜悦钟艳莉厉蕾张晓锋
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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