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Production method of composite artificial graphite anode material

A technology of artificial graphite negative electrode and production method, which is applied in the field of lithium-ion battery negative electrode materials, can solve the problems of poor processing performance and low capacity of coal-based needle coke, and achieve high production efficiency, increased furnace charging capacity, and low heating temperature Effect

Active Publication Date: 2016-01-13
大连宏光锂业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a production method of composite artificial graphite negative electrode material, which uses coal-based needle coke as the main raw material, utilizes the unique reversible performance of this carbonaceous material, and undergoes material structure modification process to achieve a higher intercalation Lithium and cycle performance to improve the problems of low capacity and poor processability of coal-based needle coke, and to improve the application adaptability of materials

Method used

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  • Production method of composite artificial graphite anode material

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Weigh 100 kg of delayed petroleum coke raw material B, crush and classify, and control the median particle size to 5 μm.

[0031] Weigh 30 kg of pulverized raw material A micropowder, add 9 kg of pulverized raw material B micropowder, stir and mix at room temperature for 30 minutes, and then carry out fusion treatment for 20 minutes.

[0032] Weigh 30kg of the fused material, carry out modification treatment at 300-600°C, and then put it into a resistance graphitization furnace, and carry out low-temperature graphitization treatment at 2600°C.

[0033] Weigh all the graphitized materials for pickling, then wash with water and filter to become neutral, then dry at 120°C.

[0034] Weigh 20kg of the material after pickling, add 600g of raw material C petroleum asphalt powder, mix evenly, and then carry out carbonization treatment at 1300°C.

[0035] After carbonization, the material is cooled to room temperature, classified and sieved to obtain the product.

[0036] The ...

Embodiment 2

[0039] Weigh 100 kg of high-sulfur calcined petroleum coke raw material B, crush and classify, and control the median particle size to 4 μm.

[0040] Weigh 30 kg of pulverized raw material A micropowder, add 6 kg of pulverized raw material B micropowder, stir and mix at room temperature for 30 minutes, and then carry out fusion treatment for 20 minutes.

[0041] Weigh 30kg of the fused material, carry out modification treatment at 300-600°C, and then put it into a resistance graphitization furnace, and carry out low-temperature graphitization treatment at 2500°C.

[0042] Weigh all the graphitized materials for pickling, then wash with water and filter to become neutral, then dry at 120°C.

[0043] Weigh 20kg of the material after pickling, add 400g of raw material C petroleum asphalt powder, mix evenly, and then carry out carbonization treatment at 1200°C.

[0044] After carbonization, the material is cooled to room temperature, classified and sieved to obtain the product. ...

Embodiment 3

[0048] Weigh 100 kg of delayed petroleum coke raw material B, crush and classify, and control the median particle size to 5 μm.

[0049] Weigh 30 kg of pulverized raw material A micropowder, add 7.5 kg of pulverized raw material B micropowder, stir and mix at room temperature for 30 minutes, and then carry out fusion treatment for 20 minutes.

[0050] Weigh 30kg of the fused material, carry out modification treatment at 300-600°C, and then put it into a resistance graphitization furnace, and carry out low-temperature graphitization treatment at 2700°C.

[0051] Weigh all the graphitized materials for pickling, then wash with water and filter to become neutral, then dry at 120°C.

[0052] Weigh 20kg of the material after pickling, add 800g of raw material C petroleum asphalt powder, mix evenly, and then carry out carbonization treatment at 1400°C.

[0053] After carbonization, the material is cooled to room temperature, classified and sieved to obtain the product.

[0054] A ...

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Abstract

The invention provides a production method of a composite artificial graphite anode material. The production method includes the following steps: (A) employing two raw materials, comprising micro powders of petroleum coke and coal-based needle coke, according to certain ratio, and performing gas-flow mixing, shaping, fusion pressurization and such composite processes to attach the petroleum coke onto the surface of the coal-based needle coke; (B) performing low-temperature graphitization treatment in a resistance-type graphitization furnace (crucible free) with temperature controlled to be 2500-2800 DEG C; (C) after the materials are cooled to room temperature, performing acid pickling, and washing the materials in water and performing filtration until neutralization; (D) drying the materials at 120 DEG C and adding a little of asphalt to the materials to perform surface coating; and (E) performing low-temperature carbonization at 1200-1400 DEG C. The production method mainly employs the coal-based needle coke as the main raw materials, so that the anode material is low in raw material cost and graphitization temperature and is greatly reduced in production cost. By means of the petroleum coke and the asphalt to perform composite granulation and coating treatment, the material is ensured to have enough capacity and processing property, thereby increasing the cost-performance ratio of the material.

Description

technical field [0001] The invention relates to a production method of a composite artificial graphite negative electrode material, which belongs to the technical field of lithium ion battery negative electrode materials. Background technique [0002] Lithium-ion battery is a new type of environmentally friendly battery that has developed rapidly in the past ten years. It uses lithium-intercalated carbon material instead of metal lithium as the negative electrode material, which overcomes the problem of poor safety caused by lithium dendrites in the past. Lithium battery has main characteristics such as high voltage and high specific energy, and has outstanding advantages such as long cycle life, less self-discharge, no memory effect, and no environmental pollution. A new generation of batteries, widely used in portable electronic devices, electric vehicles, defense industry and other fields. [0003] For the lithium-ion battery industry, electrode materials have always bee...

Claims

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Application Information

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IPC IPC(8): C01B31/04
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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