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Conjugated ladder polymer-carbon nanotube composite material and its preparation method and application

A technology of carbon nanotubes and polymers, applied in active material electrodes, structural parts, electrical components, etc., can solve the problems of complex process, high cost, and low output, and achieve the effect of simple preparation method, low cost, and convenient operation

Active Publication Date: 2022-05-06
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually these methods are complicated, costly, and low in output, so finding a simple and easy-to-operate method to prepare an organic material for lithium-ion battery negative electrode has important scientific significance and engineering value.

Method used

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  • Conjugated ladder polymer-carbon nanotube composite material and its preparation method and application
  • Conjugated ladder polymer-carbon nanotube composite material and its preparation method and application

Examples

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Effect test

Embodiment 1

[0028] A method for preparing a conjugated ladder polymer-carbon nanotube composite material, comprising the steps of: adding 5 mg of polybenzobisimidazole dibenzophenanthroline and 5 mg of carbon nanotubes with an outer diameter of 100 nm into methanesulfonic acid , stirred for 24 hours to obtain a mixed solution, wherein, in the mixed solution, the concentration of polybenzobisimidazole dibenzophenanthroline is 0.1mg / mL; Add water dropwise to the mixture, the rate of adding water is 20s / drop, and stir while adding, stop adding water when the solution turns from red to purple flocs, centrifuge to take flocs, and then wash the flocs with ethanol and water , ultrasonication, and centrifugation to obtain conjugated ladder polymer-carbon nanotube composites.

[0029] Take the above conjugated ladder polymer-carbon nanotube composite material for SEM scanning, the results can be found in figure 1 , figure 1 It is the SEM characterization figure of the conjugated ladder polymer-c...

Embodiment 2

[0031] A method for preparing a conjugated ladder polymer-carbon nanotube composite material, comprising the steps of adding 5 mg of polybenzobisimidazole dibenzophenanthroline and 10 mg of carbon nanotubes with an outer diameter of 100 nm into methanesulfonic acid , stirred for 12 hours to obtain a mixed solution, wherein the concentration of polybenzobisimidazole dibenzophenanthroline in the mixed solution was 0.1mg / mL; the mixed solution was placed in an ice bath at 0°C, and a micro syringe pump was used to inject Add water dropwise, the rate of adding water is 40s / drop, stir while adding, stop adding water when the solution turns from red to purple flocs, centrifuge to take the flocs, wash the flocs with ethanol and water, and ultrasonically , centrifuged to obtain conjugated ladder polymer-carbon nanotube composites.

[0032] Take the above conjugated ladder polymer-carbon nanotube composite material for TEM scanning, the results can be found in figure 2 , figure 2 It...

Embodiment 3

[0034] A method for preparing a conjugated ladder polymer-carbon nanotube composite material, comprising the steps of: adding 1 mg of polybenzobisimidazole dibenzophenanthroline and 10 mg of carbon nanotubes with an outer diameter of 10 nm into methanesulfonic acid , stirred for 24 hours to obtain a mixed solution, wherein the concentration of polybenzobisimidazole dibenzophenanthroline in the mixed solution was 0.01 mg / mL; the mixed solution was placed in a water bath at 30° C. Add water dropwise into the solution, the rate of adding water is 1s / drop, stir while adding, stop adding water when the solution turns from red to purple flocs, centrifuge to take the flocs, then wash the flocs with ethanol and water, Ultrasound and centrifugation to obtain the conjugated ladder polymer-carbon nanotube composite material.

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Abstract

The invention discloses a conjugated ladder polymer-carbon nanotube composite material, wherein the conjugated ladder polymer is coated on the outer wall of the carbon nanotube. The invention also discloses a preparation method of the above-mentioned conjugated ladder polymer-carbon nanotube composite material, comprising the following steps: uniformly dispersing the conjugated ladder polymer and carbon nanotubes in methanesulfonic acid to obtain a mixed solution; Add water dropwise and stir, stop adding water when flocs are formed, and wash the flocs to obtain a conjugated ladder polymer-carbon nanotube composite material. The invention also discloses the application of the above-mentioned conjugated ladder polymer-carbon nanotube composite material in lithium ion batteries. The invention is supported by carbon nanotubes, and the conjugated trapezoidal polymer grows along the outer wall of the carbon nanotubes to form a coating structure. The carbon nanotubes provide a good conductive channel, enhance the conductivity of the invention, and improve its cycle performance And rate characteristics, used as lithium ion battery negative electrode, improve its electrochemical performance.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to a conjugated ladder polymer-carbon nanotube composite material and its preparation method and application. Background technique [0002] In the past 20 years, with the increasingly prominent environmental pollution and energy crisis, the development of low-carbon economy and the development of green energy technology have become the focus of current research. As a member of green energy, lithium-ion batteries are widely used in portable electronic devices and power tools due to their advantages such as high energy density, long cycle life, no memory effect, and environmental friendliness. The expansion of the field of energy storage engineering has also put forward higher and higher requirements for the performance and safety of lithium-ion batteries. [0003] The key to the improvement of lithium-ion battery performance (energy density, power density, safety and servi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/60H01M4/62H01M10/0525
CPCH01M4/606H01M4/625H01M10/0525H01M2004/027Y02E60/10
Inventor 程圆圆
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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