Positive electrode collector recycling treatment method of waste lithium ion battery

A lithium-ion battery and cathode current collector technology, which is applied in the field of waste lithium-ion battery cathode current collector recovery and treatment, can solve the problems of high energy consumption, large amount of wastewater treatment, and high reagent consumption, so as to reduce pollution and avoid lye discharge , Reagent consumption reduction effect

Inactive Publication Date: 2017-09-22
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems of high reagent consumption, high energy consumption, and large wastewater treatment capacity in the method of separating the current collector from the positive electrode material in the prior art, the present invention provides a method for recycling and processing the positive electrode current collector of a waste lithium-ion battery, which not only Simple and easy to operate, low reagent consumption, low energy consumption, small amount of wastewater treatment, and can effectively separate the current collector bonded with the positive electrode material in the waste lithium-ion battery

Method used

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Embodiment 1

[0044] A method for reclaiming and treating a positive electrode collector of a waste lithium-ion battery, comprising the following steps:

[0045] Step a1, soaking the waste lithium ion battery in a 5% NaCl solution by mass fraction for 24 hours, fully discharging, then drying the fully discharged waste lithium ion battery at 60°C, and then mechanically dismantling, removing A steel shell and a plastic shell are obtained to obtain battery cores, and then the battery cores are crushed into crushed battery core materials with a particle size of 5-10 mm. Through analysis and detection: the Al content in these crushed battery core materials is 5.46wt%.

[0046] Step b1, adding 100 g of the crushed battery core material into the lye to dissolve the positive current collector, the concentration of the lye is 150 g / L, the initial Al concentration in the lye is 25 g / L, and the temperature for dissolving the positive current collector is 95°C , the stirring speed for dissolving the p...

Embodiment 2

[0051] A method for recovering and processing the positive electrode current collector of waste lithium-ion batteries. The battery core crushed materials of waste lithium-ion batteries provided by a certain factory do not include copper foil and battery separators in these battery core crushed materials, and the Al content in these battery core crushed materials For 2.28wt%, it can specifically include the following steps:

[0052] Step a2, adding 100 g of the crushed battery core material into the lye to dissolve the positive current collector. The lye is the lye produced in step e1 of Example 1 of the present invention, and the temperature for dissolving the positive current collector is 95°C. The stirring speed of the positive electrode current collector is 500 rpm, and the time for dissolving the positive electrode current collector is 2 hours, so as to obtain leached pulp. Since the crushed battery core material used in step a2 does not include copper foil and battery sep...

Embodiment 3

[0056] A method for recycling and treating the positive electrode current collector of waste lithium-ion batteries. The positive electrode scraps produced in a lithium-ion battery production process in a certain factory are used as battery core crushed materials. The Al content in these battery core crushed materials is 8.30wt%. Specifically, it can include The following steps:

[0057] Step a3, adding 100 g of the crushed battery core material into the lye to dissolve the positive current collector. The lye uses the lye produced in step c2 of Example 2 of the present invention, and the temperature for dissolving the positive current collector is 95°C. The stirring speed of the positive electrode current collector is 500 rpm, and the time for dissolving the positive electrode current collector is 2 hours, so as to obtain leached pulp. Since the battery core pulverized material used in step a3 is the positive electrode scrap produced in the lithium-ion battery production proces...

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Abstract

The invention discloses a positive electrode collector recycling treatment method of a waste lithium ion battery. The method comprises the following steps: adding battery cell powder particles in an alkali liquor to dissolve the positive electrode collector, thereby obtaining the leach slurry; if a piece of copper foil or a battery diaphragm is existent in the leach slurry, firstly screening the leach slurry, and then filtering the screen underflow, thereby obtaining the leach slurry filtrate and the leach slurry filter residue; otherwise, directly filtering the leach slurry, thereby obtaining the leach slurry filtrate and the leach slurry filter residue; adding aluminum hydroxide seed crystal in the leach slurry filtrate to perform the separation by crystallization, and filtering to obtain the crystallized aluminum hydroxide and the alkali liquor, wherein the alkali liquor is recycled as the alkali liquor for dissolving the positive electrode collector. The treatment method disclosed by the invention is less in reagent consumption, low in energy consumption, small in wastewater treatment amount, and capable of effectively separating the collector adhered with the positive electrode material in the waste lithium ion battery.

Description

technical field [0001] The invention relates to the technical field of recycling waste lithium-ion batteries, in particular to a method for recycling and treating a positive electrode collector of a waste lithium-ion battery. Background technique [0002] Since the commercialization of lithium-ion batteries in the 1990s, they have gradually replaced other types of secondary batteries and are widely used in mobile communications, notebook computers, portable tools, electric bicycles and other fields. According to statistics, the service life of lithium-ion batteries is generally about 3 years, and the cycle is about 500 to 1000 times. With the production, use and scrapping of a large number of lithium-ion batteries, the recycling and reuse of used lithium-ion batteries has become the focus of the entire industry. [0003] Due to the disadvantages of high energy consumption and serious air pollution in the treatment of waste lithium-ion batteries by the fire method, most of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54
CPCY02W30/84H01M10/54
Inventor 张永禄尹飞王振文揭晓武崔成旺
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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