Method and device for recycling metal in waste lithium ion batteries by water-soluble ionic liquid

Abstract

The invention discloses a method and a device for recycling metal in waste lithium ion batteries by water-soluble ionic liquid. The method comprises the steps that: (1) a waste lithium ion battery is subjected to electricity discharge treatment; (2) after the electricity discharge, the waste lithium ion battery is disassembled and separated manually so as to obtain an anode, a cathode, a diaphragm and a shell containing a circuit board, and the anode, the cathode, the diaphragm and the shell containing the circuit board are separated and sorted; (3) the water-soluble ionic liquid is heated in an oil bath and is stirred by an electric mixer; (4) the anode and the cathode which are separated are added into the oil bath respectively and stay in the oil bath for 25 minutes for performing the separation of a negative material and a copper foil and the separation of a positive material and an aluminum foil; (5) after the water-soluble ionic liquid in the oil bath is cooled, the aluminum foil and the copper foil which are separated are taken out and washed; (6) the cooled water-soluble ionic liquid is filtered and the positive material and the negative material are separated and washed. The device comprises the oil bath which is capable of performing automatic temperature control and the electric mixer, wherein the electric mixer is inserted in the oil bath and the rotation speed of the electric mixer is adjustable. The method and the device have the characteristics of high disassembly efficiency, high recycling purity of valuable metal and the positive material and environment friendliness.

Description

technical field [0001] The invention relates to the technical field of recycling electronic waste, in particular to a method and a device for recovering metals in waste lithium-ion batteries with a water-soluble ionic liquid. Background technique [0002] The current widespread use of consumer electronics (including laptops, mobile phones, and tablets, etc.) and the acceleration of their replacement have brought about the generation of a large number of waste lithium-ion batteries; at the same time, the development of electric vehicles is in the ascendant, and the huge market and demand will inevitably lead to a large amount of waste. Generation of lithium-ion batteries. It is predicted that the output of waste lithium-ion batteries will reach 500,000 tons in 2020. In addition, like general electronic waste, waste lithium-ion batteries also have dual characteristics of resource and hazard. This type of waste contains high-grade copper, aluminum valuable metals and high-val...

AI Technical Summary

Problems solved by technology

[0005] In the treatment process of waste lithium-ion batteries, the discharge and deep resource utilization have been more researched and used, and the recycling process is relatively weak.

Moreover, most of the above research stays in the laboratory stage, and has not formed a mature complete set of commercial operation process.

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