Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation process of high-performance lithium ion battery silicon negative electrode material by compounding serpentine powder with graphene

A technology of composite graphene and lithium-ion batteries, which is applied in the directions of battery electrodes, active material electrodes, negative electrodes, etc., can solve the problems of complex preparation process of nanomaterials, affect the application of silicon materials, and high preparation costs, and achieve cost-effective and low-cost , Good product performance

Active Publication Date: 2021-10-29
信骅(上海)器材有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the complex preparation process of nanomaterials, harsh conditions, high equipment requirements, and high preparation costs still affect the application of silicon materials in actual production.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation process of high-performance lithium ion battery silicon negative electrode material by compounding serpentine powder with graphene
  • Preparation process of high-performance lithium ion battery silicon negative electrode material by compounding serpentine powder with graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A preparation process for a high-performance lithium-ion battery silicon negative electrode material using serpentine powder composite graphene, comprising the steps of:

[0045] S1, crush the serpentine to get D 50 = 20 μm particles, use a demagnetizer to remove metal impurities in the particles, use concentrated sulfuric acid with a mass fraction of 98% to pickle the pulverized serpentine and press filter to obtain a filter residue, which is placed at 900 ° C for high temperature Sintering to obtain amorphous silicon;

[0046] S2, according to the weight ratio of 1:5, add amorphous silicon into the dispersion solvent, and disperse at a speed of 3000r / min for 30min to obtain amorphous silicon slurry; according to the weight ratio of 20:1, add the Graphene oxide slurry, continue to disperse for 30min, obtain composite slurry;

[0047] S3, heat up the composite slurry to 200°C, emulsify at 10000r / min for 2h, pump the emulsified composite slurry into a solvent explosion...

Embodiment 2

[0053] A preparation process for a high-performance lithium-ion battery silicon negative electrode material using serpentine powder composite graphene, comprising the steps of:

[0054] S1, crush the serpentine to get D 50 = 20 μm particles, use a demagnetizer to remove metal impurities in the particles, use concentrated sulfuric acid with a mass fraction of 98% to pickle the pulverized serpentine and press filter to obtain a filter residue, which is placed at 1000 ° C for high temperature Sintering to obtain amorphous silicon;

[0055] S2, according to the weight ratio of 1:5, add amorphous silicon into the dispersion solvent, and disperse at 3300r / min for 30min to obtain amorphous silicon slurry; according to the weight ratio of 20:1, add the Graphene oxide slurry, continue to disperse for 30min, obtain composite slurry;

[0056] S3, heat up the composite slurry to 200°C, emulsify at 12500r / min for 2h, pump the emulsified composite slurry into a solvent explosion-proof spr...

Embodiment 3

[0062] A preparation process for a high-performance lithium-ion battery silicon negative electrode material using serpentine powder composite graphene, comprising the steps of:

[0063] S1, crush the serpentine to get D 50 = 20 μm particles, use a demagnetizer to remove metal impurities in the particles, use concentrated sulfuric acid with a mass fraction of 98% to pickle the crushed serpentine and press filter to obtain a filter residue, which is placed at 1100 ° C for high temperature Sintering to obtain amorphous silicon;

[0064] S2, according to the weight ratio of 1:5, add amorphous silicon into the dispersion solvent, and disperse at a speed of 3600r / min for 30min to obtain amorphous silicon slurry; according to the weight ratio of 20:1, add Graphene oxide slurry, continue to disperse for 30min, obtain composite slurry;

[0065] S3, raise the temperature of the composite slurry to 200°C, emulsify at 15000r / min for 2 hours, pump the emulsified composite slurry into a s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle size (mesh)aaaaaaaaaa
sizeaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of lithium ion battery negative electrode materials, and particularly discloses a preparation process of a high-performance lithium ion battery silicon negative electrode material by compounding serpentine powder with graphene, and the preparation process specifically comprises the following steps of S1, crushing serpentine, carrying out acid pickling with concentrated sulfuric acid, carrying out filter pressing to obtain filter residues, and sintering the filter residues at high temperature to obtain amorphous silicon; S2, adding amorphous silicon into a dispersing solvent, dispersing to obtain amorphous silicon slurry, adding the graphene oxide slurry, and dispersing to obtain composite slurry; S3, heating and emulsifying the composite slurry, then carrying out spray drying to obtain particles; S4, putting the particles into a high-temperature furnace to be sintered; S5, adding the sintered particles into an NMP solution, adding graphene and carbon nanotubes, and uniformly dispersing; and S6, carrying out spray drying on the dispersed slurry again, screening, and carrying out vacuum packaging. The preparation raw materials are easy to obtain and low in cost, a prepared workpiece is simple, and the prepared negative electrode material has excellent electrochemical activity.

Description

technical field [0001] The present application relates to the technical field of lithium-ion battery negative electrode materials, and more specifically, it relates to a preparation process of a high-performance lithium-ion battery silicon negative electrode material using serpentine powder composite graphene. Background technique [0002] Among the anode materials for lithium-ion batteries, the current capacity of graphite materials has been increased to the extreme, and it is basically impossible to increase its gram capacity. Therefore, the development of high-capacity anode materials is of great significance. Silicon-based anode materials have received extensive attention as anode materials for next-generation lithium-ion batteries due to their high capacity. [0003] Compared with the traditional graphite negative electrode, silicon has an ultra-high theoretical specific capacity (4200mAh / g) and a lower delithiation potential (<0.5V), and the voltage platform of sili...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M4/62H01M10/0525
CPCH01M4/386H01M4/625H01M10/0525H01M2004/027H01M2004/021Y02E60/10
Inventor 林怡君朱文翊
Owner 信骅(上海)器材有限公司