Production method and product of lithium-ion power battery rate cathode material

A technology of power battery and manufacturing method, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve problems such as difficulty in ensuring quality uniformity, lengthy manufacturing process, and increased cost, and achieve large-scale production and cost control with abundant sources , The effect of simple manufacturing process

Inactive Publication Date: 2012-04-25
HUZHOU CHUANGYA POWER BATTERY MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods also bring problems such as cost increase and quality uniformity are difficult to guarantee.
Japanese patent JP2002000564 proposed a method of forming several selected raw materials-heat treatment-crushing-secondary molding-secondary heat treatment-secondary crushing, which greatly improved the structure and surface state of the negative active material, and the electrochemical specific capacity Synchronized with the anti-attenuation ability, of course, the lengthy manufacturing process will inevitably lead to a substantial increase in cost

Method used

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  • Production method and product of lithium-ion power battery rate cathode material
  • Production method and product of lithium-ion power battery rate cathode material
  • Production method and product of lithium-ion power battery rate cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] In a 50-liter small reaction kettle, heavy products of petroleum processing, heavy products of coal processing and carbon nanotubes are sequentially added, and the weights added are 9.0 kg, 1.0 kg and 0.05 kg respectively. Then, the temperature of the reactor was raised from room temperature to 590° C. at a temperature increase rate of 0-2.0° C. / min. The whole heating process was carried out under the inert gas N 2 Down, the pressure is maintained at 0-0.02MPa. Under the final temperature condition, keep it for 0-3 hours, then cool the material and take it out. Then graphitization treatment is performed to obtain the negative electrode material of the lithium ion battery, and the temperature of the carbonization treatment is 1280°C.

[0051] The particle size of the above-mentioned heavy product of coal tar processing is D50=3.0-50.0 μm, the particle size of the low-temperature carbonization product of the heavy residue of hydrocarbon polycondensation reaction is D50=...

Embodiment 2

[0053] In a 50-liter small reaction kettle, heavy products of petroleum processing, heavy products of coal tar processing and carbon microspheres were sequentially added, and the added weights were 9.0 kg, 1.0 kg and 0.05 kg respectively. Then, the temperature of the reactor was raised from room temperature to 590° C. at a temperature increase rate of 0-2.0° C. / min. The whole heating process was carried out under the inert gas N 2 Down, the pressure is maintained at 0-0.02MPa. Under the final temperature condition, keep it for 0-3 hours, then cool the material and take it out. Then, graphitization treatment is performed to obtain the negative electrode material of the lithium ion battery, and the temperature of the graphitization treatment is 2400°C.

[0054] The particle size of the above-mentioned coal tar processed heavy product is D50=3.0-50.0 μm, and the particle size of the petroleum processed heavy product is D50=4.0-20.0 μm.

Embodiment 3

[0056] In a 50-liter small reaction kettle, heavy products of petroleum processing, heavy products of coal tar processing, and vapor-phase deposited carbon fibers were sequentially added, and the added weights were 9.0 kg, 1.0 kg, and 0.05 kg, respectively. Then, the temperature of the reactor was raised from room temperature to 590° C. at a temperature increase rate of 0-2.0° C. / min. The whole heating process was carried out under the inert gas N 2 Down, the pressure is maintained at 0-0.02MPa. Under the final temperature condition, keep it for 0-3 hours, then cool the material and take it out. The material is crushed and classified to keep the particle size of the material at D50=4.0-12.0μm, and then carbonized to obtain the negative electrode material of lithium ion battery. The temperature of carbonization is 1000°C.

[0057] The particle size of the above-mentioned coal tar processed heavy product is D50=3.0-50.0 μm, and the particle size of the petroleum processed heav...

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Abstract

The invention relates to a production method of a lithium-ion battery carbon cathode active material, comprising the following steps: (1) selecting heavy products from coal-tar processing and / or heavy products from petroleum processing as raw materials, and crushing the raw materials; (2) adding additives in the crushed raw materials; (3) mixing the crushed particles with the additives, then carrying out thermo-chemical reforming to obtain a reformed product; and (4) cooling the reformed product to room temperature, then crushing and grading to obtain micro powder, and then carbonizing or graphitizing the micro powder; or directly carbonizing or graphitizing the reformed product. The produced product has the advantages of high electrochemical specific capacity, good processing property, and strong adaptability of other matching materials.

Description

technical field [0001] The invention relates to a method for manufacturing a lithium ion battery negative electrode active material, in particular to a method for manufacturing a lithium ion battery carbon negative electrode active material. Background technique [0002] In the lithium-ion battery material system, modified artificial graphite, modified natural graphite, mesocarbon microspheres (MBG) or composite materials of artificial graphite and natural graphite have been industrialized. Generally speaking, in the application of power batteries, the above materials have certain limitations. The application of ordinary modified artificial graphite, modified natural graphite and composite materials of artificial and natural graphite in small batteries has the advantages of high capacity and long life. Advantages, however, in the process of rapid charge and discharge, due to the limitation of its particle shape, lithium ions cannot be quickly and effectively intercalated or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C01B31/04H01M4/1393H01M4/38
CPCY02E60/122Y02E60/10
Inventor 胡博吕猛郭雷高平刘锐剑
Owner HUZHOU CHUANGYA POWER BATTERY MATERIALS
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