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Nanoscale graphene material dispersion process

A graphene and nano-scale technology, applied in the direction of inorganic chemistry, non-metallic elements, electrical components, etc., can solve the problems of increasing business operating costs and fixed asset investment, achieve excellent charging acceptance, and reduce the effect of agglomeration

Pending Publication Date: 2020-10-16
ZHEJIANG XINGHAI ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, one imported Ross brand mixer easily costs more than two million yuan, which virtually increases the operating cost and fixed asset investment of the enterprise.

Method used

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Experimental program
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Effect test

Embodiment 1

[0024] A nano-scale graphene material dispersion process is characterized in that it specifically comprises the steps:

[0025] Step 1, first wet the graphene composite conductive powder with n-butanol, add the surfactant SDBS to disperse, then place it in an ultrasonic cleaner for ultrasonic oscillation for 1 hour and take it out;

[0026] Step 2, taking dimethylformamide with a mass ratio of graphene composite conductive powder of 1:2, adding organic solvent dimethyl sulfoxide to fully dissolve it;

[0027] Step 3: Add the wetted graphene composite conductive powder into the dissolved dimethylformamide, stir and sonicate for 30 minutes, and heat to volatilize the organic solvent, then use ethylenediamine as the curing agent, and stir thoroughly Ultrasonic extrusion of bubbles to obtain preliminary modified graphene composite conductive powder;

[0028] Step 4, pretreatment, compounding the pre-modified graphene composite conductive powder with non-ionic high polymer (PVP) t...

Embodiment 2

[0033] A nano-scale graphene material dispersion process is characterized in that it specifically comprises the steps:

[0034] Step 1, first wet the graphene composite conductive powder with n-butanol, add surfactant SDBS to disperse, then put it in an ultrasonic cleaner for ultrasonic oscillation for 2 hours and take it out;

[0035] Step 2, taking the dimethylformamide whose mass ratio is 1:2 with the graphene composite conductive powder, adding the organic solvent acetone to fully dissolve it;

[0036] Step 3: Add the wetted graphene composite conductive powder into the dissolved dimethylformamide, stir and sonicate for 35 minutes, and heat to volatilize the organic solvent, then use ethylenediamine as the curing agent, and stir thoroughly Ultrasonic extrusion of bubbles to obtain preliminary modified graphene composite conductive powder;

[0037] Step 4, pretreatment, compounding the pre-modified graphene composite conductive powder with non-ionic high polymer (PVP) to s...

Embodiment 3

[0042] A nano-scale graphene material dispersion process is characterized in that it specifically comprises the steps:

[0043] Step 1, firstly wet the graphene composite conductive powder with n-butanol, add surfactant SDBS to disperse, then place it in an ultrasonic cleaner for ultrasonic oscillation for 3 hours and take it out;

[0044] Step 2, taking dimethylformamide with a mass ratio of graphene composite conductive powder of 1:2, adding organic solvent methyl ethyl ketone to fully dissolve it;

[0045] Step 3: Add the wetted graphene composite conductive powder into the dissolved dimethylformamide, stir and sonicate for 40 minutes, and heat to volatilize the organic solvent, then use ethylenediamine as the curing agent, and stir thoroughly Ultrasonic extrusion of bubbles to obtain preliminary modified graphene composite conductive powder;

[0046] Step 4, pretreatment, compounding the pre-modified graphene composite conductive powder with non-ionic high polymer (PVP) t...

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Abstract

The invention discloses a nanoscale graphene material dispersion process, and particularly relates to the technical field of graphene materials. The nanoscale graphene material dispersion process specifically comprises the following steps 1, wetting graphene composite conductive powder with n-butyl alcohol, adding a surfactant SDBS, dispersing, then putting the graphene composite conductive powderinto an ultrasonic cleaner, carrying out ultrasonic oscillation for 1-3 hours, and then taking out the graphene composite conductive powder; 2, taking dimethylformamide with the mass ratio of dimethylformamide to the graphene composite conductive powder being 12, and adding an organic solvent to fully dissolve dimethylformamide; and 3, adding the wetted graphene composite conductive powder into the dissolved dimethylformamide. According to the invention, a good dispersion effect of the graphene-based composite conductive material can be ensured, the use requirements of the positive electrodeand the negative electrode of the graphene composite modified lithium ion battery can be met, a very complete lithium iron phosphate and nickel cobalt lithium manganate ternary-based positive electrode active material conductive network is constructed, and the battery is ensured to have excellent charging acceptance.

Description

technical field [0001] The invention belongs to the technical field of graphene materials, in particular to a nanoscale graphene material dispersion process. Background technique [0002] The d50 of graphene powder is more than 2 orders of magnitude lower than that of conventional superconducting carbon black (SP). Due to the agglomeration effect, when it is used as a conductive agent for electrode auxiliary materials, it needs to be equipped with a mixer with high dispersion power to achieve uniform dispersion. At present, an imported Ross brand mixer costs more than two million yuan, which virtually increases the company's operating costs and fixed asset investment. On the basis of the current domestic mixer configuration, it is a technical problem that needs to be overcome to achieve good dispersion of the conductive agent mainly composed of graphene. Contents of the invention [0003] The present invention provides a nano-scale graphene material dispersion process, ai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/36H01M4/505H01M4/525H01M4/58H01M10/0525C01B32/194
CPCH01M4/625H01M4/362H01M4/5825H01M4/505H01M4/525H01M10/0525C01B32/194Y02E60/10
Inventor 徐云陈春明朱纯江陈志明吴晓潭王枭烽张新
Owner ZHEJIANG XINGHAI ENERGY TECH
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