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Preparation method of graphite negative electrode material

A technology of graphite negative electrode and negative electrode material, applied in the directions of graphite, chemical instruments and methods, battery electrodes, etc., can solve the problems of poor purification effect of graphite material, poor beneficiation effect of graphite ore, poor cycle stability, etc. Small diameter, high carbon purity, and the effect of lowering the reaction temperature

Active Publication Date: 2019-12-20
贵州凯金新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The negative electrode of the lithium-ion battery is made of a negative electrode active material carbon material or non-carbon material, a binder and an additive. In the preparation, graphite ore needs to be selected. In the prior art, the beneficiation effect of graphite ore is not good, the purification effect of graphite material in the preparation process is not good, the carbon purity is not high, the obtained product has a large particle size, and the cycle stability is not good. The capacity retention rate is not high, therefore, it is necessary to design a preparation method of graphite anode material

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  • Preparation method of graphite negative electrode material
  • Preparation method of graphite negative electrode material

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Embodiment 1

[0025] A method for preparing a graphite negative electrode material, comprising the following steps: Step 1, raw material extraction; Step 2, classification; Step 3, purification; Step 4, drying and screening; Step 5, fusion coating; Step 6, lightly crushed packaging;

[0026] In the above-mentioned step 1, the light and heavy minerals are separated through the spiral chute. After the ore slurry is fed into the spiral chute, the ore particles rotate downward along the trough in the ore slurry, and are affected by gravity, friction and water flow. The particle shape and specific gravity are separated. After the separation, the tailings, that is, light minerals, are coarsely crushed by a jaw crusher, and then the coarsely crushed ore particles are finely crushed by a hammer crusher, and the finely crushed ore particles are ball milled by a ball mill. , and then carry out flotation treatment to the ore particles through the flotation machine, and the ore particles after flotation...

Embodiment 2

[0033] A method for preparing a graphite negative electrode material, comprising the following steps: Step 1, raw material extraction; Step 2, classification; Step 3, purification; Step 4, drying and screening; Step 5, fusion coating; Step 6, lightly crushed packaging;

[0034] In the above-mentioned step 1, the light and heavy minerals are separated through the spiral chute. After the ore slurry is fed into the spiral chute, the ore particles rotate downward along the trough in the ore slurry, and are affected by gravity, friction and water flow. The particle shape and specific gravity are separated. After the separation, the tailings, that is, light minerals, are coarsely crushed by a jaw crusher, and then the coarsely crushed ore particles are finely crushed by a hammer crusher, and the finely crushed ore particles are ball milled by a ball mill. , and then carry out flotation treatment to the ore particles through the flotation machine, and the ore particles after flotation...

Embodiment 3

[0041] A method for preparing a graphite negative electrode material, comprising the following steps: Step 1, raw material extraction; Step 2, classification; Step 3, purification; Step 4, drying and screening; Step 5, fusion coating; Step 6, lightly crushed packaging;

[0042]In the above-mentioned step 1, the light and heavy minerals are separated through the spiral chute. After the ore slurry is fed into the spiral chute, the ore particles rotate downward along the trough in the ore slurry, and are affected by gravity, friction and water flow. The particle shape and specific gravity are separated. After the separation, the tailings, that is, light minerals, are coarsely crushed by a jaw crusher, and then the coarsely crushed ore particles are finely crushed by a hammer crusher, and the finely crushed ore particles are ball milled by a ball mill. , and then carry out flotation treatment to the ore particles through the flotation machine, and the ore particles after flotation ...

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Abstract

The invention discloses a preparation method of a graphite negative electrode material. The preparation method comprises the following steps: 1, raw material extraction; 2, grading; 3, purification; 4, drying and screening; 5, fusion coating; 6, light crushing and packaging. Light and heavy minerals are separated through the spiral chute, and ore pulp is fed into the spiral groove, and then the ore grains do rotary motion downwards in the ore pulp along the groove; under the action of gravity, a friction force and a water flow impact force, the separation is performed according to the shape and specific gravity of ore grains; after separation, tailings, namely light minerals, are coarsely crushed through a jaw crusher, then coarsely crushed ore particles are finely crushed through a hammercrusher, the finely crushed ore particles are subjected to ball milling through a ball mill, then the ore particles are subjected to flotation treatment through a flotation machine, and the ore particles subjected to flotation are subjected to dehydration and filtration treatment. The method is good in graphite ore beneficiation effect, good in purification effect and high in carbon purity, and the obtained product is small in particle size, good in cycling stability and high in capacity retention ratio.

Description

technical field [0001] The invention relates to the technical field of preparation of graphite negative electrode materials, in particular to a preparation method of graphite negative electrode materials. Background technique [0002] The negative electrode of the lithium-ion battery is made of a negative electrode active material carbon material or non-carbon material, a binder and an additive. In the preparation, graphite ore needs to be selected. In the prior art, the beneficiation effect of graphite ore is not good, the purification effect of graphite material in the preparation process is not good, the carbon purity is not high, the obtained product has a large particle size, and the cycle stability is not good. The capacity retention rate is not high, therefore, it is necessary to design a preparation method of graphite anode material. Contents of the invention [0003] The purpose of the present invention is to provide a preparation method of graphite negative elec...

Claims

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Application Information

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IPC IPC(8): H01M4/583H01M10/0525C01B32/205C01B32/21C01B32/215
CPCC01B32/205C01B32/21C01B32/215H01M4/583H01M10/0525Y02E60/10
Inventor 仰永军彭飞仰韻霖
Owner 贵州凯金新能源科技有限公司
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