Method for recycling cobalt from waste and old lithium ion battery

A technology of lithium-ion batteries and lithium batteries, which is applied in the direction of cobalt oxide/cobalt hydroxide, etc., can solve the problems of secondary pollution, increase treatment costs, limit the scale of waste lithium battery treatment, etc., and achieve the effect of simple and feasible preparation process

Inactive Publication Date: 2011-07-27
TSINGHUA UNIV
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  • Abstract
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Problems solved by technology

In fact, lithium batteries contain a small amount of metal elemental lithium, and elemental lithium is highly flammable and explosive. In addition, the processing speed of manual disassembly or small machinery will limit the processing scale of waste lithium batteries. Therefore, these There are great limitations in the application of the method
In addition, the use of methods such as incineration to remove organic matter, solvent extraction, separation and recovery of cobalt, on the one hand, is prone to secondary pollution, and on the other hand, increases the cost of treatment

Method used

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  • Method for recycling cobalt from waste and old lithium ion battery
  • Method for recycling cobalt from waste and old lithium ion battery
  • Method for recycling cobalt from waste and old lithium ion battery

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Embodiment Construction

[0027] The present invention is illustrated below in conjunction with embodiment.

[0028] Take 5 waste lithium batteries, with a total weight of 230g, and the metal components are shown in Table 1. The non-metallic substance part includes carbon, plastic casing, organic diaphragm and electrolyte, etc.

[0029] Table 1 Lithium-ion battery metal component content (%)

[0030]

[0031] These batteries were soaked in salt water for 5 hours to release the residual power. On the one hand, the battery short circuit caused explosion during the crushing process, and on the other hand, the content of lithium intercalation in the Cu-C electrode was reduced. Air-dry the fully discharged battery, and then crush the waste lithium battery with a crusher equipped with a 12mm aperture screen to obtain 206.6g of undersize; pour the undersize into an ultrasonic cleaning tank for ultrasonic cleaning, at room temperature, fully Wash under stirring conditions for 20 minutes, pass the obtained...

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Abstract

The invention discloses a method for recovering cobalt from a waste lithium ion battery. The method comprises the following steps that: the waste lithium ion battery is placed into salt solution to be discharged; the discharged waste lithium ion battery is mechanically crushed; the crushed waste lithium ion battery is stirred and cleaned by ultrasonic wave; a grizzly screen is used to separate after the cleaning; the leaching of filtrate Co and Li is performed; Fe<3+> is removed through purification; Cu<2+> is removed through purification; the cobalt is precipitated by ammonium oxalate; and finally a filtered cobalt oxalate precipitate is cleaned by de-ionized water, is dried in a drying box, and then is placed into a muffle furnace for heat treatment for 2 hours at a temperature of 600 DEG C to produce Co2O3 powder. The method has simple and convenient and feasible preparation process, the produced Co2O3 can meet the requirement of product quality of Co2O3-Y1(GB6518-86), and the recovery rate of the Co during the whole process is more than 89 percent.

Description

technical field [0001] The invention relates to a method for separating and recovering cobalt from waste lithium ion batteries, and belongs to the technical field of recycling waste lithium batteries. Background technique [0002] Lithium-ion batteries are more and more widely used in daily life due to their advantages such as high energy density, high working voltage, long cycle life and no memory effect. These lithium-ion batteries usually cause certain harm to the environment after they are scrapped. At the same time, the metal Co contained in lithium batteries is a strategic resource with high value. Recycling waste lithium batteries and waving hands. [0003] At present, domestic research on lithium-ion battery recycling has made important progress, and there are a number of patents on waste lithium battery recycling technology. [0004] Patent [200310103584.7] recycles waste lithium batteries through roasting, crushing, sorting, and electrolytic recovery of Cu and Co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G51/04
Inventor 李金惠王泽峰陈瑶
Owner TSINGHUA UNIV
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