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Electrode composite material of flexible supercapacitor and preparation method of electrode composite material

A technology of supercapacitors and composite materials, applied in the field of energy storage materials, can solve the problems of insufficient storage capacity of flexible supercapacitors, and achieve the effects of good flexibility, convenient operation and good energy storage capacity

Active Publication Date: 2020-06-02
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above problems, the object of the present invention is to provide an electrode composite material for a flexible supercapacitor, which is based on carbon cloth self-grown MoS 2 / N-GQDs / HCNTs ternary composites, the MoS 2 The excellent energy storage performance, combined with the improved performance of nitrogen-doped graphene quantum dots (N-GQDs) on the pseudocapacitance, under the synergistic effect of helical carbon nanotubes (HCNTs), further improves the energy storage of flexible supercapacitors performance, to solve the problem of insufficient storage capacity of flexible supercapacitors in the prior art

Method used

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  • Electrode composite material of flexible supercapacitor and preparation method of electrode composite material
  • Electrode composite material of flexible supercapacitor and preparation method of electrode composite material
  • Electrode composite material of flexible supercapacitor and preparation method of electrode composite material

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Embodiment 1

[0054] An electrode composite material for a flexible supercapacitor, which is MoS prepared by self-growing molybdenum disulfide nanosheets, nitrogen-doped graphene quantum dots, and helical carbon nanotubes on carbon cloth pretreated with nitric acid by a one-step hydrothermal method 2 / N-GQDs / HCNTs ternary composites.

[0055] A preparation method for an electrode composite material of a flexible supercapacitor, comprising the following steps:

[0056] S1. Nitric acid pretreatment of carbon cloth

[0057] Soak the carbon cloth in 68wt% nitric acid for 12 hours to make the carbon cloth reach a hydrophilic effect, then wash it alternately with ethanol and acetone for 3 times, and set aside;

[0058] S2. Preparation of nitrogen-doped graphene quantum dots

[0059] Weigh 1.05g of citric acid and 1.2g of urea and dissolve them in 24mL of deionized water, stir for 10min, transfer them to a 50mL reaction kettle, react at 160°C for 8h, naturally cool to room temperature, and wash ...

Embodiment 2

[0066] An electrode composite material for a flexible supercapacitor, which is MoS prepared by self-growing molybdenum disulfide nanosheets, nitrogen-doped graphene quantum dots, and helical carbon nanotubes on carbon cloth pretreated with nitric acid by a one-step hydrothermal method 2 / N-GQDs / HCNTs ternary composites.

[0067] A preparation method for an electrode composite material of a flexible supercapacitor, comprising the following steps:

[0068] S1. Nitric acid pretreatment of carbon cloth

[0069] Soak the carbon cloth in 65wt% nitric acid for 8 hours to make the carbon cloth reach the hydrophilic effect, then alternately wash twice with ethanol and acetone, and set aside;

[0070] S2. Preparation of nitrogen-doped graphene quantum dots

[0071] Weigh 1.05g of citric acid and 1.26g of urea, dissolve them in 23mL of deionized water, stir for 10min, transfer them to a 50mL reaction kettle, react at 180°C for 6h, naturally cool to room temperature, and wash repeatedly...

Embodiment 3

[0078] An electrode composite material for a flexible supercapacitor, which is MoS prepared by self-growing molybdenum disulfide nanosheets, nitrogen-doped graphene quantum dots, and helical carbon nanotubes on carbon cloth pretreated with nitric acid by a one-step hydrothermal method 2 / N-GQDs / HCNTs ternary composites.

[0079] A preparation method for an electrode composite material of a flexible supercapacitor, comprising the following steps:

[0080] S1. Nitric acid pretreatment of carbon cloth

[0081] Soak the carbon cloth in 70wt% nitric acid for 10 hours to make the carbon cloth reach a hydrophilic effect, then wash it alternately with ethanol and acetone for 3 times, and set aside;

[0082] S2. Preparation of nitrogen-doped graphene quantum dots

[0083] Weigh 1.05g of citric acid and 1.37g of urea and dissolve them in 21mL of deionized water, stir for 10min, transfer them to a 50mL reaction kettle, react at 170°C for 10h, naturally cool to room temperature, and was...

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Abstract

The invention provides an electrode composite material of a flexible supercapacitor and a preparation method of the electrode composite material, and belongs to the technical field of energy storage materials. The electrode composite material is a MoS2 / N-GQDs / HCNTs ternary composite material prepared by self-growing molybdenum disulfide nanosheets, nitrogen-doped graphene quantum dots and spiral carbon nanotubes on carbon cloth pretreated by nitric acid by adopting a one-step hydrothermal method, and the energy storage performance of the flexible supercapacitor is improved. The specific preparation method comprises the steps of S1, nitric acid pretreatment of the carbon cloth; S2, nitric acid modification of the carbon nanotubes; S3, preparation of an electrode composite material, specifically, dissolving molybdate and a sulfur source in water, then respectively adding nitrogen-doped graphene quantum dots and spiral carbon nanotubes, adding the carbon cloth pretreated by nitric acid after ultrasonic uniform mixing, reacting at the temperature of 180-220 DEG C for 18-24h to obtain the electrode composite material. The method is convenient to operate, high in efficiency, high in loading rate and cheap in used raw materials.

Description

technical field [0001] The invention belongs to the technical field of energy storage materials, and in particular relates to a carbon cloth-based growth MoS for a flexible supercapacitor 2 / N-GQDs / HCNTs electrode composite material and its preparation method. Background technique [0002] Supercapacitors can complete the charging and discharging process in a few seconds, and have a long cycle life. They can still maintain their energy storage performance after thousands of continuous charging and discharging cycles, which is unmatched by traditional lithium-ion batteries. . With the development of flexible electronic devices, flexible supercapacitors have great application potential in flexible display devices, flexible energy storage systems, wearable flexible electronic products, etc., and are highly valued by domestic and foreign industries and academia. [0003] At present, flexible supercapacitors with two-dimensional planar structure and one-dimensional linear struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/36H01G11/40H01G11/24H01G11/86
CPCH01G11/24H01G11/30H01G11/36H01G11/40H01G11/86Y02E60/13
Inventor 李明吴昊郭增生
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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