Energy-saving and environment-friendly preparation method of an artificial graphite negative electrode material

An artificial graphite negative electrode, energy saving and environmental protection technology, applied in negative electrodes, chemical instruments and methods, battery electrodes, etc., can solve the problems of unfavorable material transfer and transportation treatment, increase processing cost, low operation efficiency, etc., and achieve favorable transfer and transportation. , The effect of reducing operating costs and time-consuming

Inactive Publication Date: 2020-12-01
赣州市瑞富特科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the object of the present invention is to provide an energy-saving and environment-friendly preparation method of artificial graphite negative electrode material, which aims to solve the problem that the equipment required by the existing process occupies a large area, consumes a lot of energy, and pollutes a lot, and at the same time the semi-finished products It is in the form of powder, which is not conducive to the transfer and transportation of materials, the operation efficiency is low, and the technical problem of increasing the processing cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This specific embodiment is to prepare artificial graphite negative electrode material, and its general steps are:

[0033] Step 1. Crushing the petroleum coke through a jaw crusher to obtain millimeter-scale raw materials, and then crushing the millimeter-scale raw materials through a high-speed pulverizer to obtain micron-scale raw material powders, wherein the D of the millimeter-scale raw materials is controlled. 50 The particle size is 1-3mm, control the D of micron raw material powder 50 The particle size is 5-15 μm.

[0034] Step 2, adding the micron-sized raw material powder and petroleum asphalt powder obtained in step 1 into the mixer, wherein the D of the petroleum asphalt powder is controlled 50 The particle size is 5-10 μm, the mass ratio of micron-sized raw material powder and petroleum asphalt powder is controlled to be 100:5, and the mixture is mixed at room temperature for 3 hours to make it evenly mixed to obtain a mixed powder.

[0035] Step 3: Add ...

Embodiment 2

[0038] This specific embodiment is to prepare artificial graphite negative electrode material, and its general steps are:

[0039] Step 1. Crushing the pitch coke through a jaw crusher to obtain millimeter-scale raw materials, and then crushing the millimeter-scale raw materials through a high-speed pulverizer to obtain micron-scale raw material powders. Among them, controlling the D of the millimeter-scale raw materials 50 The particle size is 1-3mm, control the D of micron raw material powder 50 The particle size is 5-15 μm.

[0040] Step 2. Add the micron-sized raw material powder and natural asphalt powder obtained in step 1 into the mixer, wherein the D of the natural asphalt powder is controlled. 50 The particle size is 5-10 μm, the mass ratio of micron-sized raw material powder and natural asphalt powder is controlled to be 100:8, and the mixture is mixed at 75°C for 2.5 hours to make it evenly mixed to obtain a mixed powder.

[0041] Step 3: Add the mixed powder obta...

Embodiment 3

[0044] This specific embodiment is to prepare artificial graphite negative electrode material, and its general steps are:

[0045] Step 1. Crushing the kerosene coke through a jaw crusher to obtain millimeter-scale raw materials, and then crushing the millimeter-scale raw materials through a high-speed pulverizer to obtain micron-scale raw material powders, wherein the D of the millimeter-scale raw materials is controlled. 50 The particle size is 1-3mm, control the D of micron raw material powder 50 The particle size is 5-15 μm.

[0046] Step 2. Add the micron-sized raw material powder and coal tar pitch powder obtained in step 1 into the mixer, wherein the D of the coal tar pitch powder is controlled. 50 The particle size is 5-10 μm, the mass ratio of micron-sized raw material powder and coal tar pitch powder is controlled to be 100:10, and the mixture is mixed at 200°C for 2 hours to make it evenly mixed to obtain a mixed powder.

[0047] Step 3: Add the mixed powder obtai...

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Abstract

The invention discloses an energy-saving and environment-friendly preparation method of an artificial graphite negative electrode material, and aims to solve the technical problems that the existing process needs a large equipment occupied area and high energy consumption, and low operation efficiency and high processing cost due to the fact that a semi-finished product is in a powder form and isnot beneficial to material transfer and transportation treatment in the prior art. The method comprises the following steps: mixing micron-sized raw material powder with asphalt powder, mixing the rawmaterials at room temperature to 300 DEG C, replacing granulation of a reaction kettle at high temperature with high-pressure and ultrahigh-pressure effects so as to replace granulation of a high-temperature reaction kettle with compression molding, and treating, crushing and grading a high-temperature graphitized product so as to obtain the artificial graphite negative electrode material. According to the method, granulation of a high-temperature reaction kettle is replaced with compression molding, energy consumption is effectively reduced, consumed time is shorter, efficiency is higher, meanwhile, blocky semi-finished products are more beneficial to transfer and transportation, energy consumption is further reduced, operation efficiency is improved, and large-scale production of the artificial graphite negative electrode material is facilitated.

Description

technical field [0001] The invention belongs to the field of preparation of lithium battery graphite negative electrode materials, in particular to an energy-saving and environment-friendly preparation method of artificial graphite negative electrode materials. Background technique [0002] Compared with ordinary batteries, lithium-ion batteries have been rapidly popularized in mobile phones, notebook computers, etc. because of their high energy density, long cycle life, and no memory effect. The demand for multi-function and long-term driving continues to increase, and the demand for lithium-ion battery capacity is also increasing. At present, the improvement of lithium-ion battery capacity mainly depends on the development and improvement of negative electrode materials. Therefore, for a long time, increasing the specific capacity of lithium-ion battery negative electrode materials, reducing the first irreversible capacity, and improving the rate characteristics have alway...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/205H01M4/583H01M10/0525
CPCC01B32/205H01M4/583H01M10/0525H01M2004/027Y02E60/10
Inventor 彭渊敏韩峰韩少峰杨栋梁郭峰
Owner 赣州市瑞富特科技有限公司
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