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Low-energy-consumption preparation method of artificial graphite/coke negative electrode material of lithium ion battery

A lithium-ion battery, artificial graphite technology, applied in battery electrodes, secondary batteries, chemical instruments and methods, etc., can solve the problem of high energy consumption, and achieve the effects of reducing energy consumption, increasing porosity, and increasing specific surface area

Pending Publication Date: 2022-03-04
上海巴库斯超导新材料有限公司
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AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a low-energy preparation method of artificial graphite / coke negative electrode materials for lithium-ion batteries, which solves the problem of high energy consumption in the graphitization process

Method used

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Embodiment

[0032] The embodiment of the present invention provides a low energy consumption preparation method of artificial graphite / coke negative electrode material for lithium ion battery, comprising the following steps:

[0033] S1, coke is processed

[0034] The coke lumps are pulverized through a pulverizer to make the particle size between 100-200 mesh, keep the coke particles small, facilitate the subsequent storage of metals and gases, and make the reactions everywhere complete, and there is no reaction failure or prolonged phenomenon of time;

[0035] S2, carry out activation treatment

[0036] Put the obtained granular coke into the activation furnace, pour in the activator mixed gas, and activate the coke to increase the specific surface area and porosity of the coke particles. The activator mixed gas includes carbon dioxide gas and ammonia gas. The activator The production steps of mixed gas are:

[0037] 1) Mix carbon dioxide gas and ammonia gas according to the correspo...

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Abstract

The invention provides a low-energy-consumption preparation method of an artificial graphite / coke negative electrode material of a lithium ion battery, and relates to the field of negative electrode materials for lithium ion batteries. The low-energy-consumption preparation method of the artificial graphite / coke negative electrode material of the lithium ion battery comprises the following steps: S1, treating coke; s2, carrying out activating treatment; s3, keeping an activated state; s4, carrying out graphitization; s5, removing impurities; and S6, obtaining the negative electrode material. The catalyst and ammonia gas are used for supplying energy to graphitization and reducing the reaction temperature, the coke can be driven in situ by the alloy during the carbonization reaction and is subjected to the graphitization process, and meanwhile, the ammonia gas in the carbon can react, so that internal sulfide is reduced, heat is released, the local temperature is relatively high, and the graphitization reaction is relatively rapid.

Description

technical field [0001] The invention relates to the technical field of negative electrode materials for lithium ion batteries, in particular to a low energy consumption preparation method for artificial graphite / coke negative electrode materials for lithium ion batteries. Background technique [0002] The anode material of commercial lithium-ion batteries is mainly graphite. Graphite is divided into natural graphite and artificial graphite according to its source. Natural graphite is obtained through graphite ore beneficiation. The selected graphite needs to be further processed before it can be used as the negative electrode of lithium-ion batteries. [0003] Existing artificial graphite needs to undergo high-temperature graphitization to remove internal impurities. During the heating process of coke, its microcrystals grow with the increase of temperature, and the distortion and defects in the microcrystals are gradually eliminated, gradually transforming into graphitize...

Claims

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Application Information

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IPC IPC(8): C01B32/336C01B32/205H01M4/587H01M10/0525
CPCC01B32/336C01B32/205H01M4/587H01M10/0525Y02E60/10
Inventor 俞梦孙李娟叶伦良陈锦波
Owner 上海巴库斯超导新材料有限公司
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