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Method for manufacturing amorphous carbon and multi-walled carbon nano-tube composite electrode materials on basis of polypyrrole carbonization

A technology of multi-walled carbon nanotubes and amorphous carbon, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of metal lithium deposition, safety hazards, and low lithium intercalation potential, and achieve low self-discharge rate and low cost , no memory effect

Inactive Publication Date: 2015-12-02
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the lithium storage capacity of graphite is limited to the formation of LiC 6 The highest theoretical capacity is 372 mAh per gram, and the lithium intercalation potential is low. During the charge and discharge process, the graphite surface may cause the deposition of metal lithium, which has certain safety hazards.

Method used

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  • Method for manufacturing amorphous carbon and multi-walled carbon nano-tube composite electrode materials on basis of polypyrrole carbonization
  • Method for manufacturing amorphous carbon and multi-walled carbon nano-tube composite electrode materials on basis of polypyrrole carbonization
  • Method for manufacturing amorphous carbon and multi-walled carbon nano-tube composite electrode materials on basis of polypyrrole carbonization

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Embodiment 1

[0032] A method for preparing an amorphous carbon and multi-walled carbon nanotube composite electrode material based on polypyrrole carbonization, the specific preparation steps are as follows:

[0033] a. Mix 0.05mmol methyl orange and 20ml deionized water and then carry out magnetic stirring treatment to obtain a methyl orange aqueous solution; add 0.5mmol ferric chloride and 0.5mmol pyrrole to the methyl orange aqueous solution in turn and stir at room temperature for 12 hours Obtaining polypyrrole; washing the polypyrrole with alcohol and deionized water to make it neutral, and then vacuum drying at 50°C for 10 hours;

[0034] b. Carbonizing polypyrrole in a tube furnace at 700°C for 1 hour to obtain amorphous carbon;

[0035] c. Amorphous carbon and multi-walled carbon nanotubes were magnetically stirred in ethanol for 4 hours in a mass ratio of 90:10, and vacuum-dried at 50°C for 10 hours to obtain amorphous carbon and multi-walled carbon nanotubes based on polypyrrole ...

Embodiment 2

[0037] A method for preparing an amorphous carbon and multi-walled carbon nanotube composite electrode material based on polypyrrole carbonization, the specific preparation steps are as follows:

[0038] a. After mixing 0.15mmol methyl orange and 30ml deionized water, carry out magnetic stirring treatment to obtain methyl orange aqueous solution; add 1.5mmol ferric chloride and 1.5mmol pyrrole in the methyl orange aqueous solution successively and stir at room temperature for 24 Obtain polypyrrole in 1 hour; Wash polypyrrole with alcohol and deionized water respectively to make it neutral, then vacuum dry at 60°C for 24 hours;

[0039] b. Carbonizing polypyrrole in a tube furnace at 750°C for 3 hours to obtain amorphous carbon;

[0040] c. Amorphous carbon and multi-walled carbon nanotubes were magnetically stirred in ethanol at a mass ratio of 98:2 for 6 hours, and vacuum-dried at 60°C for 24 hours to obtain amorphous carbon and multi-walled carbon nanotubes based on polypyrr...

Embodiment 3

[0042]A method for preparing an amorphous carbon and multi-walled carbon nanotube composite electrode material based on polypyrrole carbonization, the specific preparation steps are as follows:

[0043] a. After mixing 0.15mmol methyl orange and 30ml deionized water, carry out magnetic stirring treatment to obtain methyl orange aqueous solution; add 1.5mmol ferric chloride and 1.5mmol pyrrole in the methyl orange aqueous solution successively and stir at room temperature for 24 Obtain polypyrrole in 1 hour; Wash polypyrrole with alcohol and deionized water respectively to make it neutral, then vacuum dry at 60°C for 24 hours;

[0044] b. Carbonizing polypyrrole in a tube furnace at 900°C for 3 hours to obtain amorphous carbon;

[0045] c. Amorphous carbon and multi-walled carbon nanotubes were magnetically stirred in ethanol for 6 hours at a mass ratio of 95:5, and vacuum-dried at 60°C for 24 hours to obtain amorphous carbon and multi-walled carbon nanotubes based on polypyrro...

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Abstract

The invention provides a method for manufacturing amorphous carbon and multi-walled carbon nano-tube composite electrode materials on the basis of polypyrrole carbonization, and belongs to the technical field of processes for manufacturing composite nano-materials. The method includes particular preparation steps of a, sequentially adding iron trichloride and pyrrole into methyl orange aqueous solution and stirring the iron trichloride and the pyrrole at the room temperature to obtain polypyrrole; b, washing the polypyrrole until the polypyrrole is neutral, drying the polypyrrole under a vacuum condition and carbonizing the polypyrrole in a tube furnace at the temperature of 700-970 DEG C for 1-4 hours to obtain amorphous carbon; c, magnetically stirring the amorphous carbon and multi-walled carbon nano-tubes in ethyl alcohol for 4-9 hours, and drying the amorphous carbon and the multi-walled carbon nano-tubes at the temperature of 50-70 DEG C under a vacuum condition for 10-30 hours to obtain the amorphous carbon and multi-walled carbon nano-tube composite electrode materials on the basis of polypyrrole carbonization. The method has the advantages that the amorphous carbon and multi-walled carbon nano-tube composite electrode materials on the basis of polypyrrole carbonization can be used as negative electrode materials for lithium batteries and electrode materials for super-capacitors, are excellent in electrochemical performance, free of memory effects or pollution and low in self-discharge rate, and the method is low in cost and simple in process.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite material preparation technology, and in particular relates to a method for preparing a polypyrrole carbonized amorphous carbon and multi-wall carbon nanotube composite electrode material. Background technique [0002] Lithium-ion batteries have the advantages of high voltage, high specific capacity, green environmental protection, and long cycle life. Since their introduction in 1991, they have become the most popular choice for mobile phones, notebook computers, digital cameras, video cameras, electric vehicles, hybrid vehicles and various portable instruments and equipment. ideal power supply. The positive electrode material, negative electrode material and electrolyte are the key factors affecting the performance of lithium-ion batteries, and the excellent performance of the negative electrode material is of great significance. Graphite is widely used as an anode material for commercial ...

Claims

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Application Information

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IPC IPC(8): H01M4/583H01M4/1393H01M10/0525
CPCH01M4/1393H01M4/362H01M4/583H01M10/0525Y02E60/10
Inventor 金波朱永福郎兴友高旺杨春成文子李建忱赵明蒋青
Owner JILIN UNIV
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