Composite nano material and preparation method and application thereof

A technology of composite nanomaterials and nanotubes, applied in nanocarbon, carbon nanotubes, nanotechnology and other directions, can solve the problems of unsatisfactory electrical performance indicators such as capacitance and cycle performance of negative electrode materials, and achieve good cycle performance and enhanced diffusion. The effect of speed, good electrical performance

Active Publication Date: 2020-07-31
杭州鼎友五金机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main advantage of this patent is that the raw material is graphite with low carbon content, which reduces the cost of raw materials and simplifies the preparation process. However, the electrical performance indicators such as the capacitance and cycle performance of the negative electrode material are not ideal.

Method used

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  • Composite nano material and preparation method and application thereof

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Embodiment 1

[0032] A kind of preparation method of composite nano material, concrete steps are as follows:

[0033] (1) First use acidified carbon nanotubes as raw materials, and use polyethyleneimine to modify them to prepare modified carbon nanotubes;

[0034] (2) Then react the modified carbon nanotubes with epoxidized cellulose to form carbon nanotube-cellulose composites;

[0035] (3) Finally, the carbon nanotube-cellulose composite is doped with nitrogen, phosphorus, and copper in sequence to obtain the composite nanomaterial (see the SEM image in figure 1 ).

[0036] The specific method of step (1) is: first disperse 1kg of acidified carbon nanotubes in 8kg of water, then add 100kg of polyethyleneimine, 500W ultrasonic vibration for 40 minutes, and then vigorously stir at a stirring rate of 8000r / min for 30 minutes, using mass Adjust the pH to 8 with concentrated ammonia water at a concentration of 25%, centrifuge, wash with deionized water three times, and dry in vacuum to obtai...

Embodiment 2

[0045] A kind of preparation method of composite nano material, concrete steps are as follows:

[0046] (1) First use acidified carbon nanotubes as raw materials, and use polyethyleneimine to modify them to prepare modified carbon nanotubes;

[0047] (2) Then react the modified carbon nanotubes with epoxidized cellulose to form carbon nanotube-cellulose composites;

[0048] (3) Finally, the carbon nanotube-cellulose composite is sequentially doped with nitrogen, phosphorus, and copper to obtain the composite nanomaterial.

[0049] The specific method of step (1) is: first disperse 1kg of acidified carbon nanotubes in 10kg of water, then add 80kg of polyethyleneimine, 700W ultrasonic vibration for 30 minutes, and then vigorously stir at a stirring rate of 10000r / min for 20 minutes, using mass Concentrated ammonia water with a concentration of 28% adjusted the pH to 7, centrifuged, washed with deionized water for 4 times, and dried in vacuum to obtain the modified carbon nanotu...

Embodiment 3

[0058] A kind of preparation method of composite nano material, concrete steps are as follows:

[0059] (1) First use acidified carbon nanotubes as raw materials, and use polyethyleneimine to modify them to prepare modified carbon nanotubes;

[0060] (2) Then react the modified carbon nanotubes with epoxidized cellulose to form carbon nanotube-cellulose composites;

[0061] (3) Finally, the carbon nanotube-cellulose composite is sequentially doped with nitrogen, phosphorus, and copper to obtain the composite nanomaterial.

[0062] The specific method of step (1) is: first disperse 1kg of acidified carbon nanotubes in 9kg of water, then add 90kg of polyethyleneimine, 600W ultrasonic vibration for 35 minutes, and then vigorously stir at a stirring rate of 9000r / min for 25 minutes. Concentrated ammonia water with a concentration of 26% adjusted the pH to 7, centrifuged, washed with deionized water 4 times, and dried in vacuum to obtain the modified carbon nanotubes.

[0063] Th...

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Abstract

The invention provides a nano composite material and a preparation method and application thereof. The preparation method comprises the steps that acidified carbon nanotubes serve as a raw material; firstly, polyethyleneimine is used for modification treatment to prepare modified carbon nanotubes; then the modified carbon nanotubes react with epoxidized cellulose, and a carbon nanotube-cellulose compound is generated; and finally, the carbon nanotube-cellulose compound is sequentially subjected to nitrogen doping and phosphorus and copper doping to acquire the composite nano material. The composite nano material can be used as a battery negative electrode material, and is high in electric capacity, excellent in cycle performance and good in electrical property.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a composite nanomaterial and its preparation method and application. Background technique [0002] Nanomaterials are the frontier field of scientific research today, and have been one of the research hotspots of many scientists around the world in recent years. In addition, due to the continuous deterioration of environmental pollution and the sharp decline in the stock of mineral energy such as coal, oil, and natural gas, how to replace fossil energy is also one of the current important research topics. Therefore, it is of great significance to develop new composite nanomaterials for chemical power sources. [0003] Lithium-ion batteries are secondary rechargeable batteries, which mainly rely on lithium ions to move between the positive and negative electrodes. During charging and discharging, lithium ions are intercalated and deintercalated back and forth between the pos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/583H01M4/60H01M4/62H01M10/0525C01B32/158
CPCB82Y30/00B82Y40/00C01B32/158H01M4/362H01M4/583H01M4/60H01M4/602H01M4/625H01M10/0525Y02E60/10
Inventor 董荣芳
Owner 杭州鼎友五金机械制造有限公司
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