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A kind of carbon nanowire and its application in lithium battery

A carbon nanowire and carbon nanofiber technology, applied in the field of materials, can solve the problems of immature carbon nanowire preparation methods, unpopular carbon nanowires, etc., and achieve the effects of good electrochemical performance, simple and easy method, and easy adsorption.

Active Publication Date: 2022-04-22
WUXI DONGHENGNEWENERGYTECHNOLOGYCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the application of carbon nanowires is not yet popular, mainly because the preparation method of carbon nanowires is not mature enough, and research and improvement are urgently needed

Method used

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  • A kind of carbon nanowire and its application in lithium battery
  • A kind of carbon nanowire and its application in lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A carbon nanowire and its application in lithium batteries, comprising the following steps:

[0024] (1) Take 10 g of polyacrylonitrile, add it to 60 mL of N,N-dimethylformamide solvent, and stir at constant temperature for 12 hours to obtain a solution;

[0025] (2) Electrospinning was carried out under the conditions of spinning voltage 18kV, receiving distance 9cm, needle diameter 0.8mm, and advancing speed 0.50mL / h to obtain fibers;

[0026] (3) be placed in drying oven;

[0027] (4) Put it into a tube furnace after drying, heat up to 700°C under the protection of nitrogen at 5°C / min for carbonization, and obtain carbon fibers after natural cooling;

[0028] (5) Pulverize with a pulverizer to obtain carbon nanofibers;

[0029] (6) Lay the carbon nanofiber on the ground electrode in the low-temperature plasma treatment device and treat it for 10 minutes, wherein, the power supply frequency is 10kHz, the working voltage is 20kV, and the discharge power is 70W;

[0...

Embodiment 2

[0033] A carbon nanowire and its application in lithium batteries, comprising the following steps:

[0034] (1) Take 10 g of polyacrylonitrile, add it to 65 mL of N,N-dimethylformamide solvent, and stir at constant temperature for 12 hours to obtain a solution;

[0035] (2) Electrospinning was carried out under the conditions of spinning voltage 19kV, receiving distance 10cm, needle diameter 0.8mm, and advancing speed 0.50mL / h to obtain fibers;

[0036] (3) be placed in drying oven;

[0037] (4) Put it into a tube furnace after drying, heat up to 730°C under the protection of nitrogen at 5°C / min for carbonization, and obtain carbon fibers after natural cooling;

[0038] (5) Pulverize with a pulverizer to obtain carbon nanofibers;

[0039] (6) Lay the carbon nanofiber on the ground electrode in the low-temperature plasma treatment device and treat it for 12 minutes, wherein, the power frequency is 12kHz, the working voltage is 20kV, and the discharge power is 75W;

[0040] (...

Embodiment 3

[0043] A carbon nanowire and its application in lithium batteries, comprising the following steps:

[0044] (1) Take 10 g of polyacrylonitrile, add it to 70 mL of N,N-dimethylformamide solvent, and stir at constant temperature for 12 hours to obtain a solution;

[0045] (2) Electrospinning was carried out under the conditions of spinning voltage 20kV, receiving distance 10cm, needle diameter 0.8mm, and advancing speed 0.50mL / h to obtain fibers;

[0046] (3) be placed in drying oven;

[0047] (4) Put it into a tube furnace after drying, heat up to 700-800°C under the protection of nitrogen at 5°C / min for carbonization, and obtain carbon fibers after natural cooling;

[0048] (5) Pulverize with a pulverizer to obtain carbon nanofibers;

[0049] (6) Lay the carbon nanofiber on the ground electrode in the low-temperature plasma treatment device and treat it for 13 minutes, wherein, the power supply frequency is 13kHz, the working voltage is 20kV, and the discharge power is 75W; ...

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Abstract

The invention provides a carbon nanowire and its application in a lithium battery. The preparation steps are as follows: take polyacrylonitrile, add it to N,N-dimethylformamide solvent, and stir at a constant temperature to obtain a solution; perform electrospinning to obtain fibers; after drying, put it into a tube furnace for carbonization, and wait for it to After natural cooling, carbon fibers are obtained; pulverized to obtain carbon nanofibers; the carbon nanofibers are flatly spread on the ground electrode in a low-temperature plasma treatment device for processing; a mixed solution containing copper tartrate and dopamine is prepared, and the obtained carbon nanofibers are impregnated therein, and magnetically stirred, Drying; place it in a tube furnace again, heat treatment, and cool to obtain carbon nanowires. The carbon nanowire prepared by the present invention shows good electrochemical performance as a lithium battery negative electrode material, and has a high specific capacity and an outstanding capacity retention rate. At the same time, due to the unique structure of the carbon nanowire itself and the doping of copper, this is beneficial Intercalation and extraction of lithium ions and transmission of ionic power during charge and discharge.

Description

technical field [0001] The invention relates to the field of materials, in particular to a carbon nanowire and its application in lithium batteries. Background technique [0002] The electrospinning method is a simple and effective method for preparing ultrafine fibers. By applying a high-voltage electric field to the electrospinning solution or melt, the solution or melt is charged and stretched and deformed in the electrostatic field, and then due to the solvent volatilization or melting The body is cooled and solidified to obtain ultrafine fibers. Compared with other preparation methods, the electrospinning method has simple process, low cost and wide application range, and has been widely used in the preparation of carbon fibers and carbon composite fibers. [0003] At present, carbon nanospheres have been widely used in nanocomposites, gas storage, lithium batteries, fuel cell electrode materials, catalyst supports, and drug delivery. At present, the application of ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M13/207D06M15/61D06M10/08D06M10/10D06M10/02B82Y40/00H01M4/587H01M10/0525D06M101/40
CPCD06M13/207D06M15/61D06M10/08D06M10/10D06M10/025H01M4/587H01M10/0525B82Y40/00H01M2004/027D06M2101/40Y02E60/10
Inventor 沈宇栋李士森
Owner WUXI DONGHENGNEWENERGYTECHNOLOGYCO LTD
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