A device and method for recovering lithium from scrap lithium batteries

Abstract

The invention discloses a device and method for recovering lithium from a scrap lithium battery. The device comprises a separating membrane, multiple micron channels uniform in orientation are formed in the separating membrane, the diameter of the micron channels is 10-100 micrometers, a stock solution region communicated with inlet ends of the micron channels is arranged at one side of the separating membrane, a separating region communicated with the outlet ends of the micron channels is arranged at the other side of the separating membrane, a section of anion-exchange membrane is arranged on the inner wall of each micron channel, and the outer surfaces of the anion-exchange membranes are communicated with cavities of the micron channels; a first electrode is arranged at the side, opposite to the stock solution region, of the separating membrane, a second electrode is arranged at the side, opposite to the separating region, of the separating membrane, the first electrode and the second electrode are used for generating field intensity covering the portion from the separating region to the stock solution region in the field intensity direction of the micron channels, and a third electrode is arranged on each anion-exchange membrane. The device has the advantages that only the hundred-micron order pore diameter requirement needs to be met, and operation pressure and manufacturing difficulty are reduced, so that separating cost is reduced, and the device is beneficial for industry popularization.

Description

technical field [0001] The invention belongs to the technical field of metal ion separation and treatment, and in particular relates to a device and method for recovering lithium from scrap lithium batteries. Background technique [0002] With the development of science and technology, electronic products have penetrated into every corner of people's lives. Compared with nickel-cadmium batteries and nickel-hydrogen batteries, lithium-ion batteries have the advantages of small size, light weight, high working voltage, high volume and mass specific energy, no memory effect, small self-discharge, wide operating temperature range, and long life. Already dominated the small portable electronics market. For example: communication phones, cameras, portable notebooks, etc. With the continuous development of society and the emergence of climate, energy and environmental issues, lithium-ion batteries have been widely used in the field of electric vehicles. [0003] In 2013, among t...

AI Technical Summary

Problems solved by technology

This process is relatively simple, but it consumes a lot of energy and produces a lot of waste gas, so strict air filtration standards are required

The hydrometallurgy method first uses mechanical methods to break the metal shell of the battery, and then adopts methods such as leaching, precipitation, ion exchange, and adsorption to obtain metal compounds. The recovered metals have high purity and low energy consumption, and are widely used. A method for separating and recovering metal ions, but the process is complicated

The bioleaching method is gradually replacing the hydrometallurgical method due to its advantages of high efficiency, low cost, less industrial demand, and environmental friendliness, but this method takes a long time and bacteria are difficult to cultivate

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