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A self-healing supercapacitor and preparation method thereof

A supercapacitor, self-healing technology, applied in the manufacture of hybrid/electric double-layer capacitors, electrodes of hybrid capacitors, etc., can solve the problems of life reduction, vulnerability to damage, limiting the performance of supercapacitors, etc., to improve the use and preparation method. Effect

Inactive Publication Date: 2019-12-10
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the performance of supercapacitors is limited because the electrode materials cannot resist excessive tensile strain and are easily damaged during wearing and use, resulting in a decrease in their lifespan.

Method used

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  • A self-healing supercapacitor and preparation method thereof
  • A self-healing supercapacitor and preparation method thereof
  • A self-healing supercapacitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Preparation:

[0030] (1) the acidified carbon nanotubes (which are treated by a mixture of sulfuric acid and nitric acid, and their microscopic morphology is measured as figure 1 As shown) 80mg was added to 100ml of sulfuric acid solution with a concentration of 0.1mol / mL, ultrasonicated for 0.5h, and then 60mg of potassium permanganate was added, and ultrasonicated for 1h.

[0031] (2) Place the above-mentioned solution that has been sonicated in a microwave oven for 3 minutes to react for 3 times, and then wash and filter until neutral to prepare manganese dioxide-loaded carbon nanotubes.

[0032] (3) Manganese dioxide-loaded carbon nanotubes prepared in the above step (2) (the microscopic appearance of which is observed is as follows: figure 2 shown) was dissolved in ethanol solution, and the mass volume concentration of manganese dioxide-loaded carbon nanotubes and ethanol was 10 mg / mL. Drop-coated on the glass slide substrate with a mass of 30mg, then drop-c...

Embodiment 2

[0037] 1. Preparation:

[0038] (1) the acidified carbon nanotubes (which are treated by a mixture of sulfuric acid and nitric acid, and their microscopic morphology is measured as figure 1 As shown) 80mg was added to 100ml of sulfuric acid solution with a concentration of 0.05mol / mL, sonicated for 0.5h, and then 60mg of potassium permanganate was added, and sonicated for 1h.

[0039] (2) The above-mentioned solution, which has been sonicated, was placed in a microwave oven for 2 minutes to react for 4 times, and then washed and filtered until neutral.

[0040] (3) Manganese dioxide-loaded carbon nanotubes prepared in the above steps (2) (the microscopic appearance of its observation is as follows: figure 2 shown) was dissolved in ethanol solution at a concentration of 15 mg / mL. Drop-coat on the polytetrafluoroethylene substrate, the mass is 30mg, and then drop-coat acidified carbon nanotubes 10mg dissolved in 1mL ethanol solution, and dry naturally to form a conductive fil...

Embodiment 3

[0045] 1. Preparation:

[0046] (1) the acidified carbon nanotubes (which are treated by a mixture of sulfuric acid and nitric acid, and their microscopic morphology is measured as figure 1 As shown) 80mg was added to 100ml of sulfuric acid solution with a concentration of 0.1mol / mL, ultrasonicated for 0.5h, and then 60mg of potassium permanganate was added, and ultrasonicated for 1h.

[0047] (2) The above-mentioned solution, which has been sonicated, was placed in a microwave oven for 3 minutes to react for 3 times, and then washed and filtered until neutral.

[0048] (3) Manganese dioxide-loaded carbon nanotubes prepared in the above steps (2) (the microscopic appearance of its observation is as follows: figure 2 shown) was dissolved in ethanol solution, and the mass volume concentration of manganese dioxide-loaded carbon nanotubes and ethanol was 10 mg / mL. Drop-coated on the substrate with a mass of 30 mg, then drop-coated 10 mg of acidified carbon nanotubes dissolved i...

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Abstract

The invention discloses a self-healing supercapacitor and a preparation method thereof. According to the method, the acidified carbon nanotubes are ultrasonically dispersed in a sulfuric acid solution and potassium permanganate to perform microwave processing, washing and extraction filtration are performed until the system is neutral, manganese dioxide loaded carbon nanotubes are prepared and dissolved in ethanol with the carbon nanotubes, and the system is successively dropped on the matrix so as to form a conductive film of a conductive network structure; polycaprolactone and elastic polyurethane are mixed and evenly stirred to be dispersed in an organic solvent, the mixed solution is dropped on the conductive film and the conductive film is obtained through solidification after heating and vacuum pumping; and gel electrolyte is coated on one side of the manganese dioxide loaded carbon nanotubes to form composite electrodes and the two composite electrodes are assembled so as to obtain the self-healing supercapacitor. According to the prepared self-healing supercapacitor, the self-healing supercapacitor has special microscopic appearance and flexibility and has the capacitor and self-healing functions so that use of the supercapacitor can be greatly enhanced by additional arrangement of self-healing.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, and more specifically relates to a self-healing supercapacitor and a preparation method thereof. Background technique [0002] Flexible and wearable electronic devices have become an important development direction of modern electronics, and they have broad prospects in electronic skin, flexible sensing, and intelligent storage. Supercapacitor (Supercapacitor) has attracted more and more attention as a new type of energy because of its high power density, high energy density of rechargeable batteries, fast charge and discharge, and long life. However, the electrode materials used in traditional supercapacitors are usually rigid, and the electrolyte is usually liquid, which makes it difficult for these supercapacitors to meet the flexibility requirements of future electronic devices. [0003] Therefore, researches based on flexible electronic devices are becoming more and more popular. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/84H01G11/24
CPCH01G11/24H01G11/84Y02E60/13
Inventor 罗洪盛周兴东王华权祝振强易国斌王卓莹
Owner GUANGDONG UNIV OF TECH