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Carbon nanotube as well as preparation method and application thereof

A technology of carbon nanotubes and transition metal salts, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as unfavorable industrial production, small diameter and limitations of carbon nanotubes

Active Publication Date: 2021-05-04
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with the chemical vapor deposition method, the reaction conditions of these two methods of directly calcining solid carbon sources are easier to control, but the preparation process is relatively cumbersome, which is not conducive to industrial production
Moreover, the carbon nanotubes prepared by the above method are thinner in diameter and lower in specific surface area, which are limited in the application of electrochemical devices.

Method used

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  • Carbon nanotube as well as preparation method and application thereof
  • Carbon nanotube as well as preparation method and application thereof
  • Carbon nanotube as well as preparation method and application thereof

Examples

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preparation example Construction

[0028] The invention provides a method for preparing carbon nanotubes, comprising the following steps:

[0029] Ball milling transition metal salts, phenolic compounds and non-ionic block copolymers to obtain gel-like precursor materials;

[0030] The gel precursor material is carbonized in a protective atmosphere, and then washed to obtain carbon nanotubes.

[0031] In the invention, the transition metal salt, the phenolic compound and the non-ionic block copolymer are ball-milled to obtain a gel precursor material.

[0032] In the present invention, the transition metal salt preferably includes at least one of cobalt salt, nickel salt, zinc salt, iron salt, ferrous salt, manganese salt and copper salt; specifically, the cobalt salt preferably includes anhydrous Cobalt Chloride, Cobalt Chloride Dihydrate, Cobalt Chloride Hexahydrate, Cobalt Nitrate Anhydrous, Cobalt Nitrate Hexahydrate, Cobalt Sulfate Anhydrous, Cobalt Sulfate Monohydrate, Cobalt Sulfate Hexahydrate, Cobalt ...

Embodiment 1

[0044] Weigh 0.5g cobalt chloride hexahydrate, 0.75g tannic acid and 2g F127, and ball mill for 4h at a speed of 200rpm to obtain a gel-like precursor material; 2 In the atmosphere, the gel precursor material was heated from room temperature (25°C) to 300°C at a rate of 5°C / min, kept at 300°C for 1 hour, and then heated to 800°C at a rate of 5°C / min. °C, heat preservation treatment at 800 °C for 4 hours; the obtained material was naturally cooled to room temperature, and the material was washed with hydrochloric acid with a concentration of 1mol / L, and then washed three times with distilled water to obtain carbon nanotubes.

[0045] figure 1 The X-ray diffraction pattern and Raman spectrum pattern of the carbon nanotube prepared for Example 1, wherein, a is the X-ray diffraction pattern, and b is the Raman spectrum pattern. Depend on figure 1 It can be seen that the metal impurities in the carbon nanotubes have been completely removed by a in figure 1 It can be seen that th...

Embodiment 2

[0050] 0.5g of ferric chloride hexahydrate, 0.75g of tannic acid and 2g of F127 were ball-milled at 200rpm for 4h to obtain a gel-like precursor material; 2 In the atmosphere, the gel precursor material was heated from room temperature (25°C) to 300°C at a rate of 5°C / min, kept at 300°C for 1 hour, and then heated to 800°C at a rate of 5°C / min. °C, heat preservation treatment at 800 °C for 4 hours, the obtained material was naturally cooled to room temperature, the material was washed with hydrochloric acid with a concentration of 1.5 mol / L, and then washed three times with distilled water to obtain carbon nanotubes.

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Abstract

The invention provides a carbon nanotube as well as a preparation method and application thereof, and belongs to the technical field of carbon nano materials. The preparation method of the carbon nanotube provided by the invention comprises the following steps: carrying out ball milling on a transition metal salt, a phenolic compound and nonionic block copolymer to obtain a gelatinous precursor material; and carbonizing the gelatinous precursor material in a protective atmosphere, and then performing washing to obtain the carbon nanotube. The carbon nanotube is prepared based on the solid-phase reaction and the sol-gel method, operation is easy, cost is low, the carbon nanotube is suitable for large-scale preparation, and the prepared carbon nanotube has the advantages of being wide in diameter, large in specific surface area, high in graphitization degree, good in conductivity and the like and has great application value in electrochemical energy storage devices.

Description

technical field [0001] The invention relates to the technical field of carbon nanomaterials, in particular to a carbon nanotube and its preparation method and application. Background technique [0002] Carbon nanotubes are a class of sp 2 One-dimensional carbon nanomaterials with hybrid structure. Due to their unique mechanical, electrical, optical and thermal properties, carbon nanotubes are widely used in many fields. Among them, in the field of electrochemical energy storage, due to its ultra-high electronic conductivity and relatively large specific surface area, carbon nanotubes can be directly used as electrode materials for devices such as lithium-ion batteries and supercapacitors, and can also be used as conductive additives. , combined with other active materials to improve electrochemical performance. [0003] At present, the common methods for preparing carbon nanotubes include arc discharge method, chemical vapor deposition method, laser evaporation method, te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/36H01G11/34H01M4/583H01M4/62B82Y40/00B82Y30/00
CPCH01G11/86H01G11/36H01G11/34H01M4/583H01M4/625B82Y40/00B82Y30/00Y02E60/10
Inventor 丁兵陈爽张校刚蔺青杨胡奔
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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