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Preparation method for graphene conductive slurry

A conductive paste and graphene technology, applied in the field of composite materials, can solve the problems of no significant effect on the improvement of lithium battery performance, difficulty in forming a three-dimensional conductive network, poor quality of graphene raw materials, etc., to achieve engineering applications and good three-dimensional conductive network , The effect of uniform slurry

Inactive Publication Date: 2017-05-10
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are many manufacturers of graphene conductive paste in China, but the product quality is generally low. The specific performance is that the quality of graphene raw materials is poor, the dispersion of graphene is poor, and the ratio of carbon materials is not good. It is difficult to form an ideal three-dimensional conductive network. The increase in performance has no significant effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The step of adopting the inventive method to prepare SP / graphene conductive paste is as follows:

[0020] Step 1: Dissolve 1g of PVP (polyvinylpyrrolidone) in 95g of NMP (N-methylpyrrolidone) and vibrate ultrasonically to form a homogeneous solution;

[0021] Step 2: 1g of graphene and 3g of SP (conductive carbon black) are added to the above solution, stirred and mixed with a glass rod to obtain a graphene suspension with a solid content of 5.0wt%;

[0022] Step 3: Ultrasonic vibration treatment is performed on the suspension to prepare the initial graphene conductive paste. Ultrasonic time: 30min;

[0023] Step 4: Transfer the initial conductive paste to a high-speed shear emulsification homogenizer for shear dispersion to obtain a uniform and fully dispersed graphene conductive paste. The frequency is 30HZ, and the cutting time is 30min.

Embodiment 2

[0025] The steps of adopting the inventive method to prepare carbon nanotube / graphene conductive paste are as follows:

[0026] Step 1: Dissolve 1g of PVP (polyvinylpyrrolidone) in 95g of NMP (N-methylpyrrolidone) and vibrate ultrasonically to form a homogeneous solution;

[0027] Step 2: Add 1g of graphene and 3g of carbon nanotubes to the above solution, stir and mix with a glass rod to prepare a graphene suspension with a solid content of 5wt%;

[0028] Step 3: Ultrasonic vibration treatment is performed on the suspension to prepare the initial graphene conductive paste. Ultrasonic time: 30min;

[0029] Step 4: Transfer the initial conductive paste to a high-speed shear emulsification homogenizer for shear dispersion to obtain a uniform and fully dispersed graphene conductive paste. The frequency is 30HZ, and the cutting time is 30min.

Embodiment 3

[0031] The step of adopting the inventive method to prepare SP / graphene conductive paste is as follows:

[0032] Step 1: Dissolve 1g of PVP (polyvinylpyrrolidone) in 94g of NMP (N-methylpyrrolidone) and vibrate ultrasonically to form a homogeneous solution;

[0033] Step 2: 0.5g graphene, 1.5g carbon nanotubes, 3gSP (conductive carbon black) were added to the above solution, stirred and mixed with a glass rod to obtain a graphene suspension with a solid content of 6.0wt%;

[0034] Step 3: Ultrasonic vibration treatment is performed on the suspension to prepare the initial graphene conductive paste. Ultrasonic time: 30min;

[0035] Step 4: Transfer the initial conductive paste to a high-speed shear emulsification homogenizer for shear dispersion to obtain a uniform and fully dispersed graphene conductive paste. The frequency is 30HZ, and the cutting time is 30min.

[0036] The graphene conductive paste prepared by the above process, compared with the general commercial condu...

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Abstract

The invention discloses a preparation method for graphene conductive slurry. The preparation method comprises the steps of dissolving a dispersing agent into a solvent firstly, and performing ultrasonic oscillation to form a uniform solution; then adding graphene and a conductive carbon material into the solution to be mixed and stirred; next, performing full dispersion through a way of ultrasonic oscillation; and finally transferring the well-dispersed slurry to a high-speed shearing emulsification homogenizing machine to be sheared and dispersed to obtain the uniform and consistent and fully-dispersed graphene conductive slurry. The preparation method is simple and easy to implement and applicable to engineering production.

Description

technical field [0001] The invention relates to a preparation method of graphene conductive paste, which belongs to the technical field of composite materials. Background technique [0002] With the increasing global warming and the depletion of fossil energy, new energy has become an inevitable choice for the sustainable development of the world. Lithium-ion batteries have excellent performance and have been widely used in small electronic products. energy field development. With the development of society, people have higher and higher requirements for the performance of lithium-ion batteries. Especially for power lithium-ion batteries, it is required to have strong battery life, high charging and discharging power, and good cycle performance. Among the key materials for lithium batteries, cathode materials are crucial to the performance of lithium-ion batteries and are the bottleneck technology for the development of lithium batteries. However, the current commercial c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/583H01M4/62H01M10/0525C01B32/184
CPCH01M4/362H01M4/583H01M4/625H01M10/0525Y02E60/10
Inventor 燕绍九南文争王楠陈翔洪起虎
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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