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Method of recycling graphite material based on novel aluminum-graphite dual-ion battery

A graphite material and battery recycling technology, applied in battery recycling, recycling technology, graphite and other directions, can solve the problems of low graphite purity, poor rate performance, and high content of graphite materials, improve grades, increase application fields, and material utilization. high rate effect

Active Publication Date: 2020-02-07
REAL POWER IND LTD +1
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Problems solved by technology

[0004] It can be seen that in this new type of aluminum-graphite dual-ion battery, the graphite material content is high, and the graphite obtained by the traditional battery recycling method has low purity, poor rate performance, and low economic value.

Method used

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  • Method of recycling graphite material based on novel aluminum-graphite dual-ion battery
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  • Method of recycling graphite material based on novel aluminum-graphite dual-ion battery

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specific Embodiment

[0068] According to the method for recycling graphite materials based on aluminum-graphite dual-ion batteries provided in the embodiments of the present invention, the obtained graphite materials are applied to traditional lithium batteries as negative electrode materials, wherein the method for preparing conventional lithium-ion batteries is as follows:

[0069] The cell capacity is designed to be 1000mAh, and different positive electrode materials, PVDF, and conductive carbon black are used to coat the aluminum foil at a ratio of 95:3:2 as the positive electrode sheet. According to the ratio of negative electrode capacity to positive electrode capacity of 1.15, the graphite material with a specific capacity design of 320mAh / g, CMC, SBR, and conductive carbon black is coated on the copper foil at a ratio of 95:1.5:2.5:1 as the negative electrode sheet. The processing technology and process control of the positive and negative electrodes adopt the current industrialized technol...

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Abstract

The invention discloses a method of recycling a graphite material based on a novel aluminum-graphite dual-ion battery and relates to the technical field of battery recovery. The method comprises the steps that S1, the waste novel aluminum-graphite dual-ion battery is recovered to obtain graphite powder; S2, the graphite powder is mixed with a coating material, coating granulation is performed after uniform mixing, and graphite particles are obtained; and S3, the graphite particles are carbonized, and the recycled graphite material is obtained, wherein in the step S2, the coating material accounts for 1-15% of the total mass of the mixture of the powder and the coating material, and the coating material is at least one of petroleum asphalt, coal pitch, phenolic resin, sucrose, glucose, carboxymethylcellulose, polyvinyl alcohol, polypropylene glycol, polyacrylic acid and polyvinylpyrrolidone. According to the scheme, the recovered graphite powder is deeply treated, the grade of the graphite powder is increased, and the application field of the graphite powder is expanded; and in the whole treatment process, energy is saved, the environment is protected, high efficiency is realized, and the material utilization rate is high.

Description

technical field [0001] The invention relates to the technical field of battery recycling, in particular to a method for recycling graphite materials based on a novel aluminum-graphite dual-ion battery. Background technique [0002] In 2016, researcher Tang Yongbing of the Shenzhen Institutes of Advanced Technology of the Chinese Academy of Sciences and his team made breakthroughs in the research of new high-efficiency batteries. A new aluminum-graphite dual-ion battery technology has been developed. The working principle of this technology is different from that of the existing traditional lithium batteries. It uses cheap graphite as the positive electrode and aluminum foil as the negative electrode active material and current collector. [0003] The structural composition of the new aluminum-graphite dual-ion battery includes: 1) replace the traditional heavy metal transition oxide or lithium iron phosphate with cheap, easy-to-obtain and environmentally friendly graphite as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/21H01M10/54
CPCC01B32/21H01M10/54Y02W30/84
Inventor 唐永炳谢呈德
Owner REAL POWER IND LTD
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