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Recovery method of waste lithium battery

A waste lithium battery and recovery method technology, which is applied in the field of separation and recovery of current collectors and active materials in waste lithium batteries, can solve the problems of complex process, inability to recycle negative electrode materials, sewage, etc., and achieve short process flow and high degree of recycling High, easy-to-operate effect

Inactive Publication Date: 2017-11-03
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Although the above wet treatments can effectively recover different valuable metals, the process is more complicated, and there are also problems with the sewage after acid and alkali treatment. In addition, the above methods can only recover valuable metals , cannot recycle the negative electrode material

Method used

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  • Recovery method of waste lithium battery
  • Recovery method of waste lithium battery

Examples

Experimental program
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Effect test

Embodiment 1

[0080] (1) The lithium cobalt oxide lithium-ion batteries collected are waste batteries of Huawei mobile phones, and these batteries are first placed in a sodium chloride solution for discharge treatment;

[0081] (2) Under the atmosphere full of nitrogen, the battery is cut open, the positive and negative active materials are taken out, respectively placed in 1% sodium hydroxide solution for 25 minutes, and rinsed with deionized water; the electrolyte components must be removed positive and negative electrodes.

[0082] (3) process the positive electrode sheet (1g) obtained in step (2), and then soak it in an aqueous solution containing Fenton's reagent (Fe 2+ / H 2 o 2 molar ratio of 1:120) in deionized water (Fe 2+ The molar concentration is 0.1mol / L); Then transfer to the reactor with ultrasonic generator, the temperature is adjusted to 65 degrees, and the ultrasonic sound intensity is 40W / cm 2 Shock 1-2h;

[0083] Sieve the positive electrode sheet solution after the ...

Embodiment 2

[0086] Compared with Example 1, the difference is only that the Fe of Fenton's reagent 2+ / H 2 o 2 The mol ratio is 1: 80, and other processing methods are identical with embodiment 1. The recovered mass of the cathode material was 0.635 g.

Embodiment 3

[0088] Compared with Example 1, the difference is only that the Fe of Fenton's reagent 2+ / H 2 o 2 The mol ratio is 1: 100, and other processing methods are identical with embodiment 1. The recovered mass of the cathode material was 0.785 g.

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Abstract

The invention provides a recovery method of a waste lithium battery. The recovery method is characterized by comprising the steps of obtaining a positive pole plate and a negative pole plate after short-circuit discharging and disassembly are performed on the waste lithium ion battery; placing the positive pole plate in a water containing a Fenton reagent, and performing immersion under ultrasonic assistant; and performing sieving to obtain an aluminum foil current collector after immersion, and performing solid-liquid separation on a Fenton immersion liquid to obtain a positive electrode active material solid. Moreover, the invention also provides a recovery method of the negative pole plate. The method provided by the invention is simple and is easy to operate, complete copper foil and aluminum foil can be recovered, and relatively-pure positive powder and negative powder also can be obtained; and moreover, smashing and high-temperature roasting are not needed, the production energy consumption is favorably reduced, and no secondary pollution to an environment is prevented.

Description

technical field [0001] The invention relates to the comprehensive utilization of waste lithium ion batteries, in particular to a method for separating and recovering current collectors and active materials in waste lithium batteries. Background technique [0002] Lithium-ion batteries are used in electronic devices such as mobile phones, notebook computers, and digital players because of their advantages such as high energy, no memory, light weight, and long life, and are expected to be used in electric vehicles, aerospace, and energy storage. . [0003] However, as the consumption increases year by year, the resulting environmental problems are becoming more and more serious. At the same time, since the metal substances in lithium batteries are non-renewable resources, comprehensive recycling of them can not only save costs, but also achieve The recycling of resources contributes to the establishment of a resource-ecological society and an environment-friendly society. ...

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 黄红军胡岳华张晓雪孙伟
Owner CENT SOUTH UNIV
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