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Lithium-ion battery capable of being disassembled and recycled conveniently, manufacturing method and disassembled and recycled method

A lithium-ion battery and recycling method technology, applied in the field of dismantling and recycling, can solve the problems of difficult disassembly and recycling of electrode materials and current collectors, potential safety hazards, environmental pollution, etc., and achieves low internal resistance, improved recovery rate, and volumetric energy density. high effect

Active Publication Date: 2019-07-12
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the existence of the adhesive, after the lithium-ion battery fails, the electrode material and the current collector (and the adsorbed electrolyte) are difficult to disassemble and recycle, causing certain environmental pollution and waste of resources, and also causing great safety hazards.

Method used

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  • Lithium-ion battery capable of being disassembled and recycled conveniently, manufacturing method and disassembled and recycled method
  • Lithium-ion battery capable of being disassembled and recycled conveniently, manufacturing method and disassembled and recycled method
  • Lithium-ion battery capable of being disassembled and recycled conveniently, manufacturing method and disassembled and recycled method

Examples

Experimental program
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Effect test

Embodiment 1

[0036] refer to figure 1 , the positive electrode material 1a (lithium manganese oxide, particle size 30 microns) is made into positive electrode slurry 2a according to the conventional method; it is filled into the porous aluminum current collector 3a by extrusion (the size of the void is the maximum particle size of the positive electrode material 1a 10 times of that), and through rolling, the two are in close contact to form the positive electrode composite pole piece 4a. Negative electrode material 1b (graphite, particle size 10 microns) is made into negative electrode slurry 2b according to a conventional method; it is filled into porous copper current collector 3b (the void size is 50% of the maximum particle diameter of negative electrode material 1b) by extrusion. times), and through rolling, the two are in close contact to form the negative electrode composite pole piece 4b. The above composite pole pieces 4a and 4b are respectively welded with aluminum tab 8a and co...

Embodiment 2

[0040] refer to figure 1, the positive electrode material 1a (lithium phosphate doped with carbon nanotubes, the mass fraction of carbon nanotubes is 1%, and the particle size is 0.01 micron) is made into positive electrode slurry 2a according to a conventional method; it is filled by extrusion into the voids of the porous aluminum current collector 3a (the void size is 10 times the maximum particle diameter of the positive electrode material 1a), and make the two closely contact by rolling to form the positive electrode composite pole piece 4a. Negative electrode material 1b (graphite, particle size 30 microns) is made into negative electrode slurry 2b according to a conventional method; it is filled into porous copper current collector 3b (the void size is 30 microns of the maximum particle diameter of negative electrode material 1b) by extrusion. times), and through rolling, the two are in close contact to form the negative electrode composite pole piece 4b. The above comp...

Embodiment 3

[0044] refer to figure 1 , the positive electrode material 1a (nickel cobalt lithium manganese oxide doped with graphene and superP, the mass fraction of graphene and superP is 0.1% and 3%, particle size 0.1 micron) is made into positive electrode slurry 2a according to a conventional method; Fill it into the gap of the porous aluminum current collector 3a (the size of the gap is 20 times the maximum particle size of the positive electrode material 1a), and make the two closely contact by rolling to form a positive composite pole piece 4a. Negative electrode material 1b (silicon carbon negative electrode material, particle size 30 microns) is made into negative electrode slurry 2b according to conventional methods; it is filled into porous copper current collector 3b (the size of the void is the largest in negative electrode material 1b) by extrusion. 30 times the size of the particles), and by rolling, the two are in close contact to form the negative electrode composite pol...

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Abstract

A lithium-ion battery that can be easily disassembled and recycled, its shell has a gas or liquid passage that communicates with the outside world, and an external valve for the gas or liquid passage. During normal use, it is used as a gas passage for regularly discharging lithium-ion batteries. When the gas is disassembled and recovered, it is used as a liquid passage to inject the solvent into the lithium ion battery and fully mix it with the internal electrode material and electrolyte, and then extract it. The invention also discloses its production method. The formation of the electrode and the current collector in close contact, and the dismantling and recycling method of the lithium-ion battery is also announced. Through the liquid passage on the shell, the solvent is injected to form a liquid-solid mixture with the electrode material and electrolyte, etc., from the lithium-ion battery. method of extraction. The method can make the recovery rate of electrode material, electrolyte, current collector and diaphragm greater than 98%, and has the advantages of low recovery cost, safety and environmental protection, and the like.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a lithium-ion battery that can be conveniently disassembled and recycled, a manufacturing method and a dismantled and recycled method. Background technique [0002] Lithium-ion batteries have the advantage of high storage energy density, and are widely used in vehicle power batteries and mobile electronic consumer goods, and are an important part of new energy. After years of development, lithium-ion batteries have formed mature positive electrode materials containing lithium compounds and negative electrode materials using various graphite-state carbons. And a relatively mature processing method has been formed, that is, the positive electrode material is mixed with a conductive agent, an adhesive, etc. to form a slurry, which is coated together, rolled, and after curing, it is tightly adhered to the aluminum foil. The negative electrode material is mi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/66H01M4/80H01M10/0525H01M10/058H01M10/54
CPCH01M4/0409H01M4/0435H01M4/661H01M4/80H01M10/0525H01M10/058H01M10/54Y02E60/10Y02W30/84Y02P70/50
Inventor 骞伟中田佳瑞杨周飞李敏于翔
Owner TSINGHUA UNIV
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