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A kind of production method of high-capacity lithium-ion battery artificial graphite negative electrode material

An artificial graphite negative electrode, lithium ion battery technology, applied in battery electrodes, batteries, secondary batteries and other directions, can solve the problems of poor cycle, loss of capacity, low yield, etc., to achieve high production efficiency, reduce the degree of oxidation, reduce the ratio of The effect of surface area

Active Publication Date: 2017-05-03
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

[0005] The purpose of the present invention is to provide a production method of artificial graphite negative electrode material for high-capacity lithium-ion batteries, to overcome artificial defects such as excessive oxidation of artificial graphite raw materials in the graphitization process, resulting in loss of capacity, poor cycle, low yield, etc.

Method used

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  • A kind of production method of high-capacity lithium-ion battery artificial graphite negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 100 kg of petroleum coke raw material A after forging, and pulverize it into coarse powder with a particle diameter of about 2 mm.

[0022] Weigh 5 kg of asphalt raw material B, and perform jet milling, and the crushed particle size is ≤3 μm.

[0023] Weigh 60 kg of crushed raw material A coarse powder, add 600 g of raw material C fine powder, stir and mix at room temperature for 30 minutes, and then graphitize at 3000° C.

[0024] Weigh 50 kg of the graphitized mixed material, finely pulverize and classify, the median particle size of the class is 18 μm, and then carry out mechanical shaping for 30 min.

[0025] Weigh 20kg of the reshaped mixed material, add 600g of raw material B micropowder, mix at room temperature for 30min, then modify at 300-600°C, and then carbonize at 1300°C.

[0026] After the carbonized material is cooled to room temperature, it is dispersed, screened, and impurity removed to obtain the product.

[0027] A LIR2430 type button battery w...

Embodiment 2

[0029] Weigh 100 kg of petroleum coke raw material A after forging, and grind it into a coarse powder with a particle diameter of about 4 mm.

[0030] Weigh 5 kg of asphalt raw material B, and perform jet milling, and the crushed particle size is ≤3 μm.

[0031] Weigh 60 kg of crushed raw material A, add 480 g of raw material C, stir and mix at room temperature for 30 minutes, and then graphitize at 3000°C.

[0032] Weigh 50 kg of the graphitized mixed material, finely pulverize and classify, the median particle size of the class is 17 μm, and then carry out mechanical shaping for 30 min.

[0033] Weigh 20kg of the reshaped mixed material, add 800g of raw material B micropowder, mix at room temperature for 30min, then modify at 300-600°C, and then carbonize at 1400°C.

[0034] After the carbonized material is cooled to room temperature, it is dispersed, screened, and impurity removed to obtain the product.

[0035] A LIR2430 type button battery was used for the test, and the...

Embodiment 3

[0037] Weigh 100 kg of needle-shaped petroleum coke raw material A, and pulverize it into a coarse powder with a particle diameter of about 4 mm.

[0038] Weigh 5 kg of asphalt raw material B, and perform jet milling, and the crushed particle size is ≤3 μm.

[0039] Weigh 60 kg of crushed raw material A, add 540 g of raw material C, stir and mix at room temperature for 30 minutes, and then graphitize at 3200°C.

[0040] Weigh 50 kg of the graphitized mixed material, finely pulverize and classify, the median particle size of the class is 15 μm, and then carry out mechanical shaping for 30 min.

[0041] Weigh 20kg of the reshaped mixed material, add 600g of raw material B micropowder, mix at room temperature for 30min, then modify at 300-600°C, and then carbonize at 1400°C.

[0042] After the carbonized material is cooled to room temperature, it is dispersed, screened, and impurity removed to obtain the product.

[0043] A LIR2430 type button battery was used for the test, and...

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Abstract

The invention provides a production method of an artificial graphite anode material for a high-capacity lithium ion battery. Petroleum coke coarse powder is taken as a raw material A, asphalt micro powder is taken as a raw material B, and single transition metal micro powder and multiple transition metal mixed micro powder are taken as a raw material C; the raw materials A and C are mixed in certain weight ratio, graphitized at the temperature of 2,800 DEG C-3,200 DEG C and then smashed; the smashed mixed materials and the raw material B are mixed in a certain weight ratio, modified at the temperature of 300 DEG C-600 DEG C and then carbonized at the temperature of 1,200 DEG C-1,500 DEG C after mixing or are directly carbonized at the temperature of 1,200 DEG C-1,500 DEG C after mixing, and the mixed materials are smashed, subjected to impurity removal and sieved after cooled to the room temperature. The method has the advantages as follows: the degree of graphitization of the material is improved due to adding of metal elements, and the material capacity is improved; the raw material A is graphitized in a coarse powder state, the surface oxidation area and the oxidation degree of particles can be reduced, and the capacity of the material can be improved, and the yield can be increased.

Description

technical field [0001] The invention relates to a production method of a high-capacity lithium ion battery artificial graphite negative electrode material, belonging to the technical field of lithium ion battery negative electrode materials. Background technique [0002] Lithium-ion battery is an ideal green power source. Since it came out in 1990, it has developed rapidly because of its excellent performance. Lithium-ion battery has quickly occupied many fields with its incomparable advantages. , notebook computers, cameras, video cameras and power tools, etc., and more and more countries are applying lithium batteries to power stations, power vehicles, military and other purposes. Among them, the negative electrode material is the key factor for the energy storage of lithium-ion batteries, and its performance determines the development level of lithium-ion batteries to a certain extent. Carbonaceous materials are the first materials that people began to study and apply to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/583H01M4/1393H01M10/0525
CPCH01M4/1393H01M4/583H01M10/0525H01M2220/10H01M2220/20H01M2220/30Y02E60/10
Inventor 王丽琼叶涛蔡奉翰韩团辉
Owner 大连宏光锂业有限责任公司
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