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Preparation method of common artificial graphite negative electrode material

An artificial graphite negative electrode, a common type of technology, applied in the direction of battery electrodes, electrical components, circuits, etc., can solve the problems of limited application of graphite negative electrode materials, the improvement of high-current charge and discharge performance is not obvious, etc., to achieve low production cost, internal The effect of small resistance and large capacity

Inactive Publication Date: 2016-10-19
HENAN RURAL AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current two ways to improve the performance of graphite, especially the improvement of high-current charge and discharge performance are not very obvious, so the application of graphite anode materials in high-end lithium-ion batteries is limited to a certain extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of preparation method of common type artificial graphite negative electrode material, comprises the following steps:

[0022] 1) Mix 250 parts by weight of water, 15 parts by weight of sodium hydroxide, 25 parts by weight of EDTA, 15 parts by weight of naphthenic acid, 5 parts by weight of phosphate ester, 2 parts by weight of sodium nitrite, and 15 parts by weight of triethanolamine to prepare the treatment liquid;

[0023] 2) Mix 100 parts by weight of pitch coke powder, 150 parts by weight of tar pitch powder and 50 parts by weight of treatment liquid, and the D50 of the pitch coke powder is 20 μm;

[0024] 3) Heat and fully knead the homogenate, the kneading temperature is 300°C, and the kneading time is 4 hours;

[0025] 4) Fully cool after mixing, and crush until the D50 is below 5mm;

[0026] 5) Continue heating to 500 degrees under the protection of inert gas, and keep it warm for 30 minutes;

[0027] 6) Grinding with a pulverizer so that the D50 of th...

Embodiment 2

[0031] A kind of preparation method of common type artificial graphite negative electrode material, comprises the following steps:

[0032] 1) Mix 250-300 parts by weight of water, 20 parts by weight of sodium hydroxide, 30 parts by weight of EDTA, 20 parts by weight of naphthenic acid, 10 parts by weight of phosphoric acid ester, 5 parts by weight of sodium nitrite, and 20 parts by weight of triethanolamine. treatment fluid;

[0033] 2) Mix 100 parts by weight of pitch coke powder, 150 parts by weight of tar pitch powder and 50 parts by weight of treatment liquid, and the D50 of the pitch coke powder is 20 μm;

[0034] 3) Heat and fully knead the homogenate, the kneading temperature is 500°C, and the kneading time is 6 hours;

[0035] 4) Fully cool after mixing, and crush until the D50 is below 5mm;

[0036] 5) Continue heating to 500 degrees under the protection of inert gas, and keep it warm for 30 minutes;

[0037] 6) Grinding with a pulverizer so that the D50 of the pu...

Embodiment 3

[0041] A kind of preparation method of common type artificial graphite negative electrode material, comprises the following steps:

[0042] 1) Mix 250-300 parts by weight of water, 15 parts by weight of sodium hydroxide, 30 parts by weight of EDTA, 15 parts by weight of naphthenic acid, 10 parts by weight of phosphoric acid ester, 5 parts by weight of sodium nitrite, and 15 parts by weight of triethanolamine. treatment fluid;

[0043] 2) Mix 100 parts by weight of pitch coke powder, 150 parts by weight of tar pitch powder and 50 parts by weight of treatment liquid, and the D50 of the pitch coke powder is 20 μm;

[0044] 3) Heat and fully knead the homogenate, the kneading temperature is 400°C, and the kneading time is 5 hours;

[0045] 4) Fully cool after mixing, and crush until the D50 is below 5mm;

[0046] 5) Continue heating to 500 degrees under the protection of inert gas, and keep it warm for 30 minutes;

[0047] 6) Grinding with a pulverizer so that the D50 of the pu...

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Abstract

The invention discloses a preparation method of a common artificial graphite negative electrode material. The preparation method comprises the following steps: (1) preparing a processing liquid; (2) evenly mixing the following component in parts by weight: 100 parts of pitch coke powder, 150 parts of tar pitch powder, and 50 parts of processing liquid, wherein the D50 of pitch coke powder is 20 [mu]m; (3) heating, and fully mixing the mixture at a temperature of 300 to 500 DEG C for 4 to 6 hours; (4) fully cooling the mixture after mixing, and grinding the mixture until D5 is less than 5 mm; (5) under the protection of inert gas, keeping on heating until the temperature reaches 500 DEG C, and maintaining the temperature for 30 minutes; (6) grinding the mixture by a pulverizer until D50 of particles reaches 5 [mu]m; (7) under the protection of inert gas, sintering the powder at a temperature of 1300 to 1500 DEG C, and raising the temperature to 3200 DEG C at a speed of 100 DEG C / h to graphitize the powder; (8) cooling to the room temperature, and grinding the powder by a pulverizer until D50 reaches 15 to 20 [mu]m.

Description

technical field [0001] The invention relates to a preparation method of an ordinary artificial graphite negative electrode material. Background technique [0002] With the development of miniaturization and mobility of electronic products, and the rapid development of power batteries for electric tools, electric motorcycles and electric vehicles, high-power and high-capacity lithium-ion batteries have become a hot spot in the development of countries all over the world. As the anode material, one of the four main materials of lithium-ion batteries, the anode material that has been commercialized and used with the best effect is carbon material, mainly including natural graphite and artificial graphite. [0003] Artificial graphite includes artificial graphite powder, mesocarbon microspheres and mesocarbon fibers. Artificial graphite powder is not suitable as a negative electrode material due to its low tap density and high specific surface area. Although mesocarbon microsph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583C01B31/04
CPCY02E60/10
Inventor 李艳芳李长见李增
Owner HENAN RURAL AMPEREX TECH
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