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Method for directly recycling graphite anode material

A technology of graphite negative electrode and negative electrode material, which is applied in the direction of recycling technology, battery recycling, waste collector recycling, etc., to achieve the effect of low energy consumption

Inactive Publication Date: 2018-09-21
SOUTH CHINA NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of direct recycling of lithium-ion power battery negative electrode materials, the object of the present invention is to provide a method for directly recycling graphite negative electrode materials

Method used

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  • Method for directly recycling graphite anode material
  • Method for directly recycling graphite anode material
  • Method for directly recycling graphite anode material

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Break the shell of the commercial waste power battery, peel off the graphite negative electrode sheet of the battery, and cut the electrode sheet into strips of 1*5cm.

[0029] (2) Put the treated negative electrode fragments in a clean large beaker, add deionized water at 25°C according to the ratio of the mass of the negative electrode piece to the mass of deionized water (1:20) for soaking for 1 min, and the negative electrode active material is immediately mixed with copper Foil separation, take out the copper foil from which the active material has been separated.

[0030] (3) Stir for 2 h at a stirring rate of 600 r / min under the action of a magnet, and after standing still for 12 h, pour the upper layer of turbid liquid, and add water again to make the volume of the solution equal to the original volume.

[0031] (4) Repeat step (3) 5 times, wash the sample with deionized water, then blow dry at 60°C, manually grind for 30 minutes, and then manually sieve thr...

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Abstract

The invention belongs to the technical field of recycling and utilization of an electrode material of a lithium ion power battery, and in particular relates to a method for directly recycling a graphite anode material. The method comprises the following steps: removing an anode electrode piece from a waste lithium ion battery, soaking the anode electrode piece in water, simply separating a graphite anode from a copper foil current collector, and then filtering, drying, grinding and sieving by meshes after changing water for multiple times, so as to obtain the recycled graphite anode material.The method disclosed by the invention is simple and high-efficient, and the obtained electrode material is good in lithium storage performance, excellent in cycle stability, and favorable for recycling the electrode material of the power battery in the industry at a low cost and with low pollution.

Description

technical field [0001] The invention belongs to the technical field of lithium ion battery recycling, and in particular relates to a method for directly recycling graphite negative electrode materials. Background technique [0002] In today's society, with the development of the economy, a large amount of fossil fuels such as coal and oil are consumed, which brings serious pollution to the environment. Therefore, new energy storage devices are attracting more and more attention. Among them, lithium-ion batteries are widely used in portable mobile communication devices, notebook computers, emergency energy storage due to their high energy density, long cycle life, and relatively safe use. Devices, new energy vehicles and other aspects have a wide range of applications. [0003] Generally speaking, the service life of lithium-ion power batteries is only 3 to 4 years, and the service life of lithium iron phosphate power batteries is only 7 to 8 years. , the actual battery lif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54
CPCH01M10/54Y02W30/84
Inventor 王辉荣李伟善黄晨帆曾瑜雯黄颖珊陈洪波刘少北
Owner SOUTH CHINA NORMAL UNIVERSITY
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