Preparation method of high-solid-content carbon nanotube conductive liquid

A technology of carbon nanotubes and high solid content, applied in the direction of nanotechnology, nanotechnology, conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problems of excessive amount of auxiliary viscosity reducer, affecting the stability of slurry, etc. Achieve the effect of reducing viscosity, reducing mutual attraction and improving dispersibility

Pending Publication Date: 2022-04-15
深圳市飞墨科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing a high-solid-content carbon nanotube conductive liquid, aiming to solve the problem that the amount of auxiliary viscosity-reducing agent added to the existing high-solid-content carbon nanotube conductive liquid is too much and affects the stability of the slurry technical issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method of high solid content carbon nanotube conductive liquid, which comprises the following preparation steps:

[0041] Step 1, using low-temperature plasma to modify carbon nanotubes, so that the surface of carbon nanotubes contains carboxyl groups;

[0042] Step 2, using low-temperature plasma to modify the dispersant, so that the surface of the dispersant contains amino groups;

[0043] Step 3, adding the modified dispersant and the modified carbon nanotubes into the solvent, and stirring evenly to obtain a carbon nanotube dispersion;

[0044] Step 4, sanding the carbon nanotube dispersion liquid with a sand mill to prepare a high-solid carbon nanotube conductive liquid.

[0045] Wherein, the treatment conditions of the low-temperature plasma modified carbon nanotubes are as follows: the carbon nanotubes are placed in the reaction chamber of the low-temperature plasma, the power is set to 50W, the discharge treatment time is 30min, and air with a pre...

Embodiment 2

[0055] A preparation method of high solid content carbon nanotube conductive liquid, which comprises the following preparation steps:

[0056] Step 1, using low-temperature plasma to modify carbon nanotubes, so that the surface of carbon nanotubes contains carboxyl groups;

[0057] Step 2, using low-temperature plasma to modify the dispersant, so that the surface of the dispersant contains amino groups;

[0058] Step 3, adding the modified dispersant and the modified carbon nanotubes into the solvent, and stirring evenly to obtain a carbon nanotube dispersion;

[0059] Step 4, sanding the carbon nanotube dispersion liquid with a sand mill to prepare a high-solid carbon nanotube conductive liquid.

[0060] Wherein, the treatment conditions of the low-temperature plasma modified carbon nanotubes are as follows: place the carbon nanotubes in the reaction chamber of the low-temperature plasma, set the power to 75W, discharge the treatment time to 35min, and pass air with a pressu...

Embodiment 3

[0070] A preparation method of high solid content carbon nanotube conductive liquid, which comprises the following preparation steps:

[0071] Step 1, using low-temperature plasma to modify carbon nanotubes, so that the surface of carbon nanotubes contains carboxyl groups;

[0072] Step 2, using low-temperature plasma to modify the dispersant, so that the surface of the dispersant contains amino groups;

[0073] Step 3, adding the modified dispersant and the modified carbon nanotubes into the solvent, and stirring evenly to obtain a carbon nanotube dispersion;

[0074] Step 4, sanding the carbon nanotube dispersion liquid with a sand mill to prepare a high-solid carbon nanotube conductive liquid.

[0075] Wherein, the treatment conditions of the low-temperature plasma modified carbon nanotubes are as follows: place the carbon nanotubes in the reaction chamber of the low-temperature plasma, set the power to 100W, discharge the treatment time to 60min, and pass air with a press...

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Abstract

The invention belongs to the technical field of carbon nano tube conductive liquid, and particularly relates to a preparation method of high-solid-content carbon nano tube conductive liquid, which comprises the following preparation steps: step 1, modifying a carbon nano tube by adopting low-temperature plasma to enable the surface of the carbon nano tube to contain carboxyl groups; 2, modifying the dispersing agent by adopting low-temperature plasma to enable the surface of the dispersing agent to contain amino groups; step 3, adding the modified dispersing agent and the modified carbon nano tube into a solvent, and uniformly stirring to prepare a carbon nano tube dispersion liquid; and 4, sanding the carbon nanotube dispersion liquid by using a sand mill to prepare the high-solid-content carbon nanotube conductive liquid. The solid content of the prepared carbon nanotube conductive liquid is 15% or above, the viscosity is smaller than 1000 mpa.s, and the conductivity of the carbon nanotube conductive liquid reaches the conductivity of thin-tube iron or cobalt.

Description

technical field [0001] The invention belongs to the technical field of carbon nanotube conductive liquid, and in particular relates to a preparation method of high solid content carbon nanotube conductive liquid. Background technique [0002] In the preparation process of lithium-ion secondary batteries and capacitors, it is often necessary to add a certain amount of conductive agent to the positive and negative electrode ingredients. The conductive agent can effectively contact with the positive and negative active materials to form a good conductive network, thereby improving the rate performance of the battery. The choice of conductive agent is especially important for high-performance electronic devices. [0003] Carbon nanotubes are emerging conductive agents in recent years. They generally have a diameter of 5-60nm and a length of 10-20μm. They can not only act as "wires" in the conductive network, but also have an electric double layer effect. Taking advantage of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01B13/00H01B1/24B82Y40/00B82Y30/00
Inventor 黄少真覃浩孔令涌
Owner 深圳市飞墨科技有限公司
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