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Method for recovering metal from used Li ion cell

A lithium-ion battery and metal technology, which is applied to lithium carbonate and copper recovery, can solve the problems of low metal taste and low identification rate of physical properties, etc., and achieve the effect of reducing loss and improving corrosion effect

Inactive Publication Date: 2003-03-12
IND TECH RES INST
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Problems solved by technology

However, it is well known that the grades of the metals obtained by sorting by physical properties are not high. Except for the satisfactory results of iron recovery by magnetic separation, generally speaking, there are still inherent limitations for other recovered metals, which cannot be achieved as wet High-grade metal products can be obtained by metallurgy. In addition to the fact that the identification rate of physical properties of many metals is not high (such as aluminum and copper in this system), the absolute value of the magnetic or electrical properties of the crushed particles is closely related to the particle size.

Method used

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  • Method for recovering metal from used Li ion cell
  • Method for recovering metal from used Li ion cell

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Embodiment

[0037] Put 100 grams of undersize into a mixed solution of 600 ml of sodium chloride and aqueous hydrochloric acid at 80° C., wherein the mixed solution is prepared by adding 100 grams of sodium chloride per liter of aqueous hydrochloric acid using 3N aqueous hydrochloric acid. After 1 hour, the insoluble matter in the mixture was removed by filtration. The filtrate (620ml) is carried out in a diaphragm electrolysis system with DuPont's codenamed Nafion cation exchange membrane to carry out the electrolysis of reclaiming metal copper from the filtrate of this pH less than 0, wherein this filtrate is used as catholyte, 0.1N sodium sulfate The aqueous solution was used as the anolyte, the mesh indium oxide electrode was used as the anode and the 4.5cm×9cm stainless steel mesh electrode was used as the cathode. The diaphragm electrolysis system is at 30°C and 0.01A / cm 2 current density for 10 hours. 4.2 g of copper metal with a purity >99% were obtained. The catholyte after el...

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Abstract

The invented method includes the physical separation method combining with the preparation procedure of the cleaning wet recycle, providing the features of simple and high purity of the recovered metal. The invention includes following steps. With the disused lithium ion cells being burned in the high-temperature furnace, the organic dielectric is removed. After the smashing and sieving treatment, the oversize material is processed through the magnetic separation and the eddy current sorting so as to obtain the iron case, copper foil and aluminium foil etc. The undersize is processed through the steps of corrosion, filtering and electrolysis so as to obtain copper and cobalt. With carbonic acid radical being added to the solution richen in lithium ion, the high purity carbonate of lithiumis formed so as to recovery lithium.

Description

technical field [0001] The invention relates to a method for recovering metals from waste lithium ion batteries, in particular to a method for recovering copper, aluminum, iron and cobalt metals, and lithium carbonate from waste lithium ion batteries. Background technique [0002] Due to its high energy density, high working voltage, long cycle life and no memory effect, lithium-ion batteries have been recognized as the battery system with the most development potential. At present, in addition to being widely used in various 3C products are on the market, and are expected to replace lead-acid, nickel-cadmium and nickel-metal hydride batteries as the power source of electric vehicles in the future. By then, the usage of lithium-ion batteries will grow exponentially. Therefore, when the use of lithium-ion batteries is increasing day by day, it is indeed necessary to develop a beneficial waste lithium-ion battery recycling and regeneration system to so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54
CPCY02W30/84
Inventor 林俊仁范昌张怡隆许哲源
Owner IND TECH RES INST
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