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A kind of production method of natural coal char composite graphite negative electrode material

A technology of composite graphite and negative electrode materials, applied in battery electrodes, electrochemical generators, electrical components, etc., to achieve the effect of improving compaction density, excellent cycle performance, high and low temperature performance, and shortening the path of lithium insertion

Active Publication Date: 2018-08-07
大连宏光锂业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although graphite anode materials have been successfully commercialized, there are still some insurmountable weaknesses

Method used

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  • A kind of production method of natural coal char composite graphite negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 200kg of coal-based coke raw material A, and pulverize it into a fine powder with a particle size D50 of 8 µm.

[0028] Weigh 50kg of asphalt raw material C and carry out jet milling, and the crushed particle size is ≤2µm.

[0029] Weigh 100kg of crushed raw material A, add 30kg of raw material B, mix uniformly at room temperature, then fuse for 30 minutes, then add 10.4kg of crushed raw material C, modify at 300~600°C, Graphitization is carried out at ℃.

[0030] Weigh 10 kg of crushed raw material C, add 5 kg of raw material D, and perform airflow mixing.

[0031] Weigh 50kg of the graphitized material (A+B+C), add 3kg of the air-mixed material (C+D), mix evenly, and then carbonize at 1300°C.

[0032] After the carbonized material is cooled to room temperature, it is dispersed, screened, and impurity removed to obtain the product.

[0033] After the product of the present invention is subjected to a series of processes such as beating and coating, it is then ...

Embodiment 2

[0035] Weigh 200kg of coal-based coke raw material A and pulverize it into fine powder with a particle size D50 of 6 µm.

[0036] Weigh 50kg of asphalt raw material C and carry out jet milling, and the crushed particle size is ≤2µm.

[0037] Weigh 100kg of crushed raw material A, add 50kg of raw material B, mix uniformly at room temperature, then fuse for 30 minutes, then add 9kg of crushed raw material C, modify at 300~600°C, under graphitization.

[0038] Weigh 10 kg of crushed raw material C, add 8 kg of raw material D, and perform airflow mixing.

[0039] Weigh 50kg of the graphitized material (A+B+C), add 2.5kg of the air-mixed material (C+D), mix evenly, and then carbonize at 1300°C.

[0040] After the carbonized material is cooled to room temperature, it is dispersed, screened, and impurity removed to obtain the product.

[0041] After a series of processes such as beating and coating, the product of the present invention is then made into a LIR2430 type button batte...

Embodiment 3

[0043] Weigh 200kg of coal-based coke raw material A and pulverize it into a fine powder with a particle size D50 of 7 µm.

[0044] Weigh 50kg of asphalt raw material C and carry out jet milling, and the crushed particle size is ≤2µm.

[0045] Weigh 100kg of crushed raw material A, add 80kg of raw material B, mix uniformly at room temperature, then fuse for 30 minutes, then add 10.8kg of crushed raw material C, modify at 300~600°C, Graphitization is carried out at ℃.

[0046] Weigh 10 kg of crushed raw material C, add 6 kg of raw material D, and perform airflow mixing.

[0047] Weigh 50kg of the graphitized material (A+B+C), add 4kg of the air-mixed material (C+D), mix evenly, and then carbonize at 1400°C.

[0048] After the carbonized material is cooled to room temperature, it is dispersed, screened, and impurity removed to obtain the product.

[0049] After the product of the present invention is subjected to a series of processes such as beating and coating, it is then m...

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Abstract

The invention discloses a production method for a natural coal coke composite graphite anode material. Coal coke micro-powder is taken as a raw material A, natural graphite with a small size is taken as a raw material B, asphalt is taken as a raw material C, and graphene is taken as a raw material D. The raw material A and the raw material B are mixed and fused according to a ratio of A to B being 100 / (30-100), then the raw material C is added according to a ratio of (A+B) to C being 100 / (3-8), modification is performed at 300-600 DEG C, and graphitization is conducted at 2800-3200 DEG C. The raw material C and the raw material D are subjected to gas-flow mixing according to a ratio of C to D being 100 / (30-80). The graphitized material is mixed with the material obtained from gas-flow mixing according to a ratio of (A+B+C) to (C+D) being 100 / (3-8) and subjected to carbonization at 1200-1500 DEG C. The carbonized material is cooled to the room temperature and is beaten, screened, and subjected to impurity removal to obtain the natural coal coke composite graphite anode material. The production method has advantages that natural graphite is mixed with coal coke for granulation, the cycle performance and high and low temperature performance of the natural graphite raw material are improved, and the processing performance and capacity of coal coke are improved. Graphene is added for coating, and the electrical conductivity of the material is improved.

Description

technical field [0001] The invention relates to a production method of a natural coal coke composite graphite negative electrode material, which belongs to the technical field of lithium ion battery negative electrode materials. Background technique [0002] Lithium-ion battery is currently the most ideal rechargeable battery in the world. It is an ideal green power source. It not only has the characteristics of high energy density, no memory effect, and long cycle life, but also has low pollution and meets environmental protection requirements. And it has developed rapidly with excellent performance. Lithium-ion batteries have rapidly occupied many fields with incomparable advantages of other batteries, such as well-known mobile phones, notebook computers, cameras, video cameras and power tools, etc., and more and more Countries in the world use lithium batteries for power stations, power vehicles, military and other purposes. [0003] Lithium-ion battery anode materials p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/587H01M4/62H01M10/0525
CPCH01M4/366H01M4/587H01M4/625H01M10/0525Y02E60/10
Inventor 王丽琼叶涛韩团辉单秉福
Owner 大连宏光锂业有限责任公司
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