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Recovery and treatment method for waster lithium ion cell

A lithium-ion battery, recycling and processing technology, applied in the field of waste resource recovery and processing, can solve problems such as lithium-ion battery pollution, and achieve the effects of simple method, improved recovery rate, and economical operation

Inactive Publication Date: 2005-03-30
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can recover precious metal elements such as cobalt, copper and lithium in the battery, solve the pollution problem of waste lithium-ion batteries, and realize the economical recycling of resources

Method used

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  • Recovery and treatment method for waster lithium ion cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A recovery example of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the used lithium-ion battery is a square-shaped iron-cased lithium-ion battery.

[0024] attached figure 1 It is a process flow diagram of the present invention. With reference to the accompanying drawings, the process of recycling waste lithium-ion batteries is as follows:

[0025] (1) By means of a shearing machine and a pulverizer, remove the outer packaging plastic shell of the waste lithium-ion battery to obtain a single battery. In this process, the charger control circuit board and connecting metal sheet are recovered, and the intact circuit board is reused after passing the inspection.

[0026] Since waste batteries generally have a certain amount of residual power, in order to avoid the danger caused by the short-circuit discharge of the positive and negative plates when the battery case is opened, these single batteries are put...

Embodiment 2

[0038] Other contents and operations are the same as in Example 1, except that carbon powder and iron powder are used as conductive agents in step (1). In step (3), when dissolving the battery waste, the concentration of sulfuric acid used is 1mol / L, the selected solid-liquid ratio is 1:30, the temperature is 95°C, and the reaction time is 6h, which can completely dissolve most of the substances to be dissolved; The concentration of hot sulfuric acid for dissolving copper in the filter residue is 8 mol / L, the amount added is 1.1 times the number of moles of copper, and the temperature is 85°C. In step (4), when adding ammonium oxalate to precipitate cobalt, the amount of ammonium oxalate added is 5 times of the theoretical value. In step (5), aluminum is precipitated at a pH value of 5.0; copper is extracted with a concentration of 5% Acorga M5640 at a pH value of 1.5, and Cyanex272 with a concentration of 0.5 mol / L is used at a pH value of 6.0. For cobalt extraction, the str...

Embodiment 3

[0040] Other contents and operations are the same as those in Example 1, except that carbon powder, iron powder and copper powder are used as conductive agents in step (1). In step (3), when dissolving the battery waste, the concentration of sulfuric acid used is 4mol / L, the selected solid-liquid ratio is 1:8, the temperature is 95°C, and the reaction time is 1h; the hot sulfuric acid concentration for dissolving copper in the filter residue is 8mol / L L, the amount added is 1.5 times the number of moles of copper, and the temperature is 75°C. In step (4), when adding ammonium oxalate to precipitate cobalt, the amount of ammonium oxalate added is 1 times of the theoretical value. In step (5), aluminum is precipitated at a pH value of 4.0; copper is extracted with a concentration of 20% Acorga M5640 at a pH value of 0.5, and extracted with Cyanex272 at a concentration of 3 mol / L at a pH value of 5.0 Cobalt, the stripping agent is 5.0mol / L sulfuric acid, which can realize the re...

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Abstract

The method for recycling and processing worn-out lithium ion battery includes steps: (1) taking out pack of worn-out battery; (2) using crushing facilities to open up case of battery, and segregation through magnetic method; (3) dissolving wastes of pole core of battery by using acid, and separating out most of cobalt through ammonium oxalate depositing method; (4) cobalt and copper deposited in residual liquid is extracted through solvent extraction method. Adding sodium carbonate generates deposition to retrieve lithium. Advantages are: simple technique, on solving pollution of worn-out batteries, and reclaining resources at same time.

Description

(1) Technical field [0001] The invention relates to a recycling and processing method for waste lithium-ion batteries, which belongs to waste recycling and processing technologies. (2) Background technology [0002] Lithium-ion batteries have been widely used in portable electrical appliances such as cameras, mobile phones, and notebook computers, and have maintained a high growth rate. For example, in 2004, the batteries used by nearly 300 million mobile phones in China were mostly lithium-ion batteries. With the rapid growth of the types and quantities of electrical appliances using lithium-ion batteries, people must face up to the problem of recycling a huge number of used lithium-ion batteries. At present, the positive electrode of a commercial lithium-ion single battery is generally composed of lithium cobalt oxide covered on aluminum foil, and the negative electrode is composed of carbon material covered on copper foil. 6 The organic solution t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00H01M10/54
CPCY02E60/12Y02W30/84
Inventor 南俊民韩东梅夏信德左晓希何广平
Owner SOUTH CHINA NORMAL UNIVERSITY
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