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Preparation method of fiber/graphene/carbon quantum dot/cobalt nickel sulfide flexible electrode material

A carbon quantum dot, cobalt-nickel sulfide technology, applied in hybrid capacitor electrodes and other directions, can solve problems such as unfavorable electrolyte ion diffusion, affect electrochemical performance, complex synthesis process, etc., achieve high electron transfer rate, facilitate full contact, and promote diffusion. Effect

Active Publication Date: 2019-08-23
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material and surface properties of textile materials are special, so it is difficult for conductive materials such as carbon to form a three-dimensional continuous conductive network on the surface. In order to increase the interaction between conductive materials and fabrics, a large amount of cross-linking agent, surface Active agents or even binders enable conductive materials to be better attached to the fabric. On the one hand, the addition of these substances will block the pores on the fabric, which is not conducive to the diffusion of electrolyte ions and affect its electrochemical performance. It will make the material synthesis process complicated and difficult, and increase the cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add the graphene oxide powder into deionized water, and ultrasonicate for 60 minutes to make a graphene oxide suspension with a concentration of 1.5 mg / mL. Cotton fabrics were treated with 1mol / L sodium hydroxide solution at 100°C for 2h, then cleaned with deionized water, and dried in a drying oven at 110°C for 2h. The pretreated cotton fabric was dipped into the prepared graphene oxide suspension, stirred at room temperature for 30 min, then dried in a vacuum oven at 50°C for 2 h, and the dipping-drying process was repeated 20 times. Immerse the cotton cloth / graphene oxide composite fabric in the carbon quantum dot solution with a concentration of 0.03mg / ml, react in the reactor at 120°C for 2h, then take it out and wash it with deionized water for 3 times, and dry it at 100°C for 2h to obtain Cotton / graphene / carbon quantum dot composite.

[0027] Immerse the cotton / graphene / carbon quantum dot composite material into a hydrothermal reactor containing cobalt nitrate, ...

Embodiment 2

[0032] The graphene oxide powder was added into deionized water, and ultrasonicated for 30 min to prepare a graphene oxide suspension with a concentration of 2 mg / mL. Cotton fabrics were treated with 0.5mol / L sodium bicarbonate solution at 90°C for 3h, then cleaned with deionized water, and dried in a drying oven at 100°C for 2.5h. The pretreated cotton fabric was dipped into the prepared graphene oxide suspension, stirred at room temperature for 20 min, then dried in a vacuum oven at 50°C for 3 h, and the dipping-drying process was repeated 30 times. Immerse the cotton cloth / graphene oxide composite fabric in the carbon quantum dot solution with a concentration of 0.04mg / ml, react in the reactor at 110°C for 3h, then take it out and wash it with deionized water for 3 times, and dry it at 100°C for 2h to obtain Cotton / graphene / carbon quantum dot composite.

[0033] Immerse the cotton cloth / graphene / carbon quantum dot composite material into a hydrothermal reactor containing c...

Embodiment 3

[0035] The graphene oxide powder was added into deionized water, and ultrasonicated for 30 min to prepare a graphene oxide suspension with a concentration of 3 mg / mL. The polyester fabric was treated with 2mol / L sodium bicarbonate solution at 120°C for 1.5h, then cleaned with deionized water, and dried in an oven at 80°C for 3h. The pretreated polyester was impregnated into the prepared graphene oxide suspension, stirred at room temperature for 50 min, then dried in a vacuum oven at 60°C for 2.5 h, and the dipping-drying process was repeated 40 times. Immerse the polyester / graphene oxide composite fabric in a carbon quantum dot solution with a concentration of 0.06mg / ml, react in a reaction kettle at 120°C for 3h, then take it out and wash it with deionized water for 3 times, and dry it at 100°C for 2h to obtain Polyester / graphene / carbon quantum dot composite.

[0036] Immerse the polyester / graphene / carbon quantum dot composite material into a hydrothermal reactor containing ...

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Abstract

The invention discloses a preparation method of a fiber / graphene / carbon quantum dot / cobalt nickel sulfide flexible electrode material, which comprises the following steps: A, soaking a pretreated fiber fabric in a suspension containing graphene oxide, drying, and repeating the step for multiple times to obtain a fiber / graphene oxide material; and B, immersing the material obtained in the step A into a hydrothermal reaction kettle containing carbon quantum dots, and carrying out heating reaction synthesis to obtain the fiber / graphene / carbon quantum dot flexible electrode material. And C, immersing the material obtained in the step B into a hydrothermal reaction kettle containing nickel salt, cobalt salt and a sulfur-containing precursor solution, and carrying out heating reaction synthesisto obtain the fiber / graphene / carbon quantum dot / cobalt nickel sulfide flexible electrode material. The material prepared by the method disclosed by the invention has relatively high area specific capacitance and power characteristics, and is excellent in cycle performance.

Description

technical field [0001] The invention relates to a preparation method of a flexible electrode material, in particular to a preparation method of a fiber / graphene / carbon quantum dot / cobalt-nickel sulfide flexible electrode material. Background technique [0002] Electrochemical capacitors are widely used in fields such as hybrid vehicles, communications, national defense, and wearable electronics based on their special features such as high capacity and high power density. As today's electronic devices are becoming thinner and more flexible, portable and wearable electronic devices such as flexible displays, distributed sensors, electronic paper and wearable multimedia devices are increasingly entering people's daily lives. However, traditional electrochemical capacitors are bulky, heavy, and have a fixed shape, which is far from meeting the development requirements of current flexible electronic devices. There is an urgent need to develop flexible electrochemical capacitors ...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/36
CPCH01G11/30H01G11/36Y02E60/13
Inventor 王薇李涛陆鑫刘康丁慧慧孙银银
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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