Method for directly recovering and producing electrowinning cobalt from waste and old lithium ionic cell

A lithium-ion battery, electrowinning technology, applied in the improvement of process efficiency, instruments, optics, etc., can solve the problems of low product added value, high cost, and high equipment requirements, and achieve high product added value, short reaction process, raw materials. low price effect

Inactive Publication Date: 2009-03-11
GUANGDONG BRUNP RECYCLING TECH +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The products obtained by this method have high impurity content such as aluminum, magnesium, calcium, etc., the process is long, the equipment requirements are high, the cost is high, and the added value of the product is low. Deep processing is often required to become high value-added products such as electrolytic cobalt and cobalt powder.

Method used

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  • Method for directly recovering and producing electrowinning cobalt from waste and old lithium ionic cell
  • Method for directly recovering and producing electrowinning cobalt from waste and old lithium ionic cell
  • Method for directly recovering and producing electrowinning cobalt from waste and old lithium ionic cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] After the waste lithium-ion battery is disassembled by professional equipment, the positive and negative electrode wastes are sorted to obtain the positive electrode sheet whose active material is lithium cobalt oxide. Take 800g of the waste material, soak in 4L N-methylpyrrolidone (NMP) at 130°C for 60min, then use 28KHz ultrasonic vibration for 10min, the active material lithium cobaltate will be separated from the aluminum foil, remove the aluminum foil, and separate N-methylpyrrolidone by suction filtration (NMP) and black solid powder materials such as lithium cobalt oxide and acetylene black. The organic solvent N-methylpyrrolidone (NMP) can be recycled after being treated, and the black powder is washed and dried. The analysis results showed that the residual cobalt on the aluminum foil accounted for about 0.23% of the total cobalt.

Embodiment 2

[0023] After the waste lithium-ion battery is disassembled by professional equipment, the positive and negative electrode wastes are sorted to obtain the positive electrode sheet whose active material is lithium cobalt oxide. Take 800g of the waste material, soak in 4L N-methylpyrrolidone (NMP) at 100°C for 60min, then use 28KHz ultrasonic vibration for 10min, the active material lithium cobaltate will be separated from the aluminum foil, remove the aluminum foil, and separate N-methylpyrrolidone by suction filtration (NMP) and black solid powder materials such as lithium cobalt oxide and acetylene black. The organic solvent N-methylpyrrolidone (NMP) can be recycled after being treated, and the black powder is washed and dried. The analysis results showed that the residual cobalt on the aluminum foil accounted for about 3.46% of the total cobalt.

Embodiment 3

[0025] Configuration contains H 2 o 2 Concentration is 0.5mol / L, HCl concentration is 1L of the mixed solution of 6mol / L, weighs 150g of the black powder obtained in Example 1, transfers it to a 2L glass beaker, pours the above mixed solution slowly, and keeps the solution at a constant temperature of 70°C in a water bath , and use a polytetrafluoroethylene stirrer to continuously stir, after leaching for 40 minutes, filter and separate the insoluble residue while it is hot, and dilute the obtained filtrate to 2L after repeated washing. After testing, the cobalt residue in the filter residue accounts for about 0.34% of the total cobalt content; the main metal contents in the obtained filtrate are as follows:

[0026] element co Li Al Cu Ni Fe mn Mg Ca Content (g / L) 42.02 4.86 0.21 0.02 0.08 0.03 0.05 0.02 0.02

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Abstract

The invention discloses a method for directly recovering and producing electro deposited cobalt from waste lithium ion cells. The method is mainly characterized in that: firstly, the waste lithium ion cells are disassembled and separated to obtain positive plates; secondly, the positive plates are immersed by an organic solvent N-methylformamide (NMP), and aluminum foils and anode materials of a current collector are separated; thirdly, the anode materials which contain lithium cobaltate are leached out by a hydrochloric acid and hydrogen peroxide system, and undissolved substances are filtered and separated; and fourthly, the electro deposited cobalt is obtained after electrodeposition of filtrate. By adoption of the method, the recovery rate of the cobalt in the waste lithium ion cells can be about 97.0 percent, and the purity of the electro deposited cobalt can be more than 99.8 percent.

Description

technical field [0001] The invention belongs to the fields of hydrometallurgy and metal electrowinning, and more specifically relates to a method for directly recovering and producing electrolytic cobalt from waste lithium ion batteries. Background technique [0002] Lithium-ion batteries have been widely used since their commercialization due to their high energy density, light weight, long life and no memory. According to statistics from the Ministry of Information Industry, the number of mobile phone users in my country has grown rapidly, from 200 million in 2003, 364 million in 2004, and 387 million in 2005 to 480 million at the end of March 2007, and the With the development of more than 6 million new users per month, China has become the world's largest mobile communication power; at the same time, with the enhancement of my country's comprehensive national strength and the rapid development of consumption level, my country has also become the world's largest manufactur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B23/00C22B7/00C22B3/10C25C1/08
CPCY02P10/20
Inventor 李长东黄国勇陈志民徐盛明
Owner GUANGDONG BRUNP RECYCLING TECH
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