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Schiff base polymer/carbon nanotube composite electrode material with shish-kebab structure and preparation method of Schiff base polymer/carbon nanotube composite electrode material

A carbon nanotube composite and electrode material technology, which is applied in the direction of carbon nanotubes, nanocarbons, battery electrodes, etc., can solve the problems of small specific surface area of ​​polymers, low utilization rate of functional groups, poor conductivity, etc., and achieve good structural stability. High yield and the effect of increasing electrical conductivity

Active Publication Date: 2019-08-20
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current studies have shown that Schiff base polymers have poor conductivity and are easy to accumulate, resulting in a small specific surface area of ​​the polymer and low utilization of functional groups, resulting in low capacity and limiting its application.

Method used

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  • Schiff base polymer/carbon nanotube composite electrode material with shish-kebab structure and preparation method of Schiff base polymer/carbon nanotube composite electrode material
  • Schiff base polymer/carbon nanotube composite electrode material with shish-kebab structure and preparation method of Schiff base polymer/carbon nanotube composite electrode material
  • Schiff base polymer/carbon nanotube composite electrode material with shish-kebab structure and preparation method of Schiff base polymer/carbon nanotube composite electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation:

[0028] 1) Weigh 0.0608 acidified carbon nanotubes into a 250mL round bottom flask, add 80mL of toluene, and sonicate for 30min to fully disperse the carbon nanotubes.

[0029] 2) Add 0.3357g terephthalaldehyde into the round bottom flask, start stirring to completely dissolve the terephthalaldehyde.

[0030] 3) Add 0.2708g of p-phenylenediamine, turn on the protection of argon under stirring, and heat to 150° C. for reflux for 6 hours.

[0031] 4) After the reaction, turn off the heating, stop the stirring after the solution is cooled to room temperature, filter under reduced pressure and wash the product fully with ethanol; dry the product at 80°C for 12 hours, collect the product as a black solid powder, which is a skewered crystal structure mat Phosphate base polymer / carbon nanotube composite electrode material.

[0032] In the composite electrode material prepared in Example 1, the mass ratio of the Schiff base polymer to the carbon nanotube is abou...

Embodiment 2

[0038] Preparation:

[0039] 1) Weigh 0.1212 acidified carbon nanotubes into a 250mL round bottom flask, add 80mL of toluene, and sonicate for 30min to fully disperse the carbon nanotubes.

[0040] 2) Add 0.3357g terephthalaldehyde into the round bottom flask, start stirring to completely dissolve the terephthalaldehyde.

[0041] 3) Add 0.2708g of p-phenylenediamine, turn on the protection of argon under stirring, and heat to 150° C. for reflux for 6 hours.

[0042] 4) After the reaction, turn off the heating, stop the stirring after the solution is cooled to room temperature, filter under reduced pressure and wash the product fully with ethanol; dry the product at 80°C for 12 hours, collect the product as a black solid powder, which is a skewered crystal structure mat Phosphate base polymer / carbon nanotube composite electrode material.

[0043]In the composite electrode material prepared in Example 2, the mass ratio of the Schiff base polymer to the carbon nanotube is about...

Embodiment 3

[0050] Preparation:

[0051] 1) Weigh 0.0971g of acidified carbon nanotubes into a 250mL round bottom flask, add 80mL of ethanol, and sonicate for 30min to fully disperse the carbon nanotubes.

[0052] 2) Add 0.3357g terephthalaldehyde into the round bottom flask, start stirring to completely dissolve the terephthalaldehyde.

[0053] 3) Add 170 μL of ethylenediamine, turn on argon protection under stirring, and heat to 80° C. for 6 hours under reflux.

[0054] 4) After the reaction, turn off the heating, stop the stirring after the solution is cooled to room temperature, filter under reduced pressure and wash the product fully with ethanol; dry the product at 80°C for 12 hours, collect the product as a black solid powder, which is a skewered crystal structure mat Phosphate base polymer / carbon nanotube composite electrode material.

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Abstract

The invention provides a Schiff base polymer / carbon nanotube composite electrode material with a shish-kebab structure and a preparation method of the Schiff base polymer / carbon nanotube composite electrode material. The composite electrode material is prepared from dialdehyde, diamine and acidified carbon nanotubes through a solvothermal reaction in one step, the dialdehyde and the diamine are used as monomers for synthesizing a Schiff base polymer, the total solubility the monomers is 0.001-2 mol / L, and the content of the carbon nanotubes in the product is 2.5-50 wt.%. According to the invention, the method is simple in reaction and high in yield, and by-product water cannot pollute the environment; particularly, the method can promote the Schiff base to uniformly grow on the carbon nanotube in an embedded manner to form a shish-kebab structure polymer; the structure not only exposes more lithium ion binding sites, but also greatly increases the specific surface area of the material, so that the contact between the electrolyte and the material is more sufficient, the conductivity of the material is increased after the carbon nano tube is compounded, and the composite electrode material has the advantages of good structural stability, high specific capacity, good rate capability and the like.

Description

technical field [0001] The invention belongs to the field of electrode materials, and in particular relates to a composite electrode material with a string crystal structure Schiff base polymer / carbon nanotube and a preparation method thereof. Background technique [0002] In recent years, the extensive use of fossil fuels has caused great damage to the environment. Therefore, it is particularly important to develop clean new energy storage and conversion technologies. In recent years, secondary batteries have attracted extensive attention and research. Among them, as a new type of secondary battery, lithium-ion batteries have the advantages of environmental protection, long cycle life, good rate performance, no memory effect, and high energy density, and have been widely used in commercial applications. At present, lithium-ion batteries are not only used in small electronic products, but also in new energy electric vehicles and in military industry. [0003] At present, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/60H01M4/583H01M4/62H01M10/0525C01B32/158
CPCC01B32/158H01M4/362H01M4/583H01M4/602H01M4/625H01M10/0525Y02E60/10
Inventor 杨应奎张建业韩小彦李红章庆
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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