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Conjugated trapezoidal polymer-carbon nanotube composite material as well as preparation method and application thereof

A carbon nanotube and composite material technology, which is applied to active material electrodes, electrical components, electrochemical generators, etc., can solve the problems of high cost, complex process, low output, etc., and achieves low cost, simple preparation method, and convenient operation. Effect

Active Publication Date: 2020-03-27
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 trapezoidal polymer-carbon nanotube composite material as well as preparation method and application thereof
  • Conjugated trapezoidal polymer-carbon nanotube composite material as well as preparation method and application thereof

Examples

Experimental program
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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, in the mixed solution, the concentration of polybenzobisimidazole dibenzophenanthroline 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 trapezoidal polymer-carbon nanotube composite material. A conjugated trapezoidal polymer coats the outer wall of a carbon nanotube. The invention also discloses apreparation method of the conjugated trapezoidal polymer-carbon nanotube composite material. The preparation method comprises the following steps: uniformly dispersing the conjugated trapezoidal polymer and carbon nanotubes in methanesulfonic acid to obtain a mixed solution; dropwise adding water into the mixed solution, stirring, stopping dropwise adding water after floccules are generated, and washing the floccules to obtain the conjugated trapezoidal polymer-carbon nanotube composite material. The invention also discloses an application of the conjugated trapezoidal polymer-carbon nanotubecomposite material in a lithium ion battery. According to the invention, the carbon nano tube is used as a support, the conjugated trapezoidal polymer grows along the outer tube wall of the carbon nano tube to form a coating structure, the carbon nano tube provides a good conductive channel, the conductivity of the carbon nano tube is enhanced, the cycle performance and rate capability of the carbon nano tube are improved, and the carbon nano tube is used as a lithium ion battery negative electrode to improve the electrochemical performance of the lithium ion battery negative electrode.

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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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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