Resource separation of waste lithium ion battery

Abstract

The invention can make separation for all kinds of components in wasted Li-ion battery such as: case, electrolyte, anode material, cathode material, adhesive, copper foil, and aluminum foil. The process includes: breaking wasted batteries by mechanical process; separating metal case from others; washing out electrolyte using organic solvent, and filtering it from remaining solid; processing the remaining component where the electrolytes are removed using organic solvent to make all electrode active component eluted from current collector, and separated from diaphragm, copper foil, and aluminum foil. The solvent and adhesive can be reused.

Description

technical field

[0001] The present invention relates to a physical separation method of various components in waste lithium-ion batteries, including casing, electrolyte, plastic diaphragm, copper foil and aluminum foil, anode material, cathode material, adhesive, and various components obtained through separation. The material reuse scheme provides a low-cost route for recycling waste lithium-ion batteries and circular economy. Background technique

[0002] Due to the advantages of large specific energy, no memory effect, and low cost of use, lithium-ion batteries have been widely used in various mobile power-consuming devices, such as notebook computers, mobile phones, cameras, video cameras, etc., and are still developing rapidly. middle. In addition to bringing convenience to people's lives, this development is inevitably the same as all other secondary batteries, because the limitation of its service life brings the same rapid and large amount of waste batteries. Altho...

Examples

Embodiment Construction

[0015] 1. Mechanical crushing of batteries:

[0016] To make reprocessing easier, the battery must be crushed in a gentle manner. In the laboratory, a hacksaw can be used to saw the casing; in industry, a machine can be used to peel off the battery's plastic and metal casing, thereby separating the battery's metal casing from the battery's contents.

[0017] Existing lithium-ion batteries generally use a method in which cathode and anode active materials are coated on copper foil and aluminum foil respectively, and a plastic separator is used to separate the electrode materials from direct contact. In order to make subsequent processing more convenient, the electrode should be cut into 1cm to 5cm square pieces.

[0018] 2. Separation of electrolyte from other solid contents

[0019] Use polar organic solvents, such as dichloromethane, chloroform, acetone, ethanol, etc., to wash out the electrolyte contained in the battery content, and separate the electrolyte solution from o...

technical field

[0001] The present invention relates to a physical separation method of various components in waste lithium-ion batteries, including casing, electrolyte, plastic diaphragm, copper foil and aluminum foil, anode material, cathode material, adhesive, and various components obtained through separation. The material reuse scheme provides a low-cost route for recycling waste lithium-ion batteries and circular economy. Background technique

[0002] Due to the advantages of large specific energy, no memory effect, and low cost of use, lithium-ion batteries have been widely used in various mobile power-consuming devices, such as notebook computers, mobile phones, cameras, video cameras, etc., and are still developing rapidly. middle. In addition to bringing convenience to people's lives, this development is inevitably the same as all other secondary batteries, because the limitation of its service life brings the same rapid and large amount of waste batteries. Altho...

Examples

Embodiment Construction

[0015] 1. Mechanical crushing of batteries:

[0016] To make reprocessing easier, the battery must be crushed in a gentle manner. In the laboratory, a hacksaw can be used to saw the casing; in industry, a machine can be used to peel off the battery's plastic and metal casing, thereby separating the battery's metal casing from the battery's contents.

[0017] Existing lithium-ion batteries generally use a method in which cathode and anode active materials are coated on copper foil and aluminum foil respectively, and a plastic separator is used to separate the electrode materials from direct contact. In order to make subsequent processing more convenient, the electrode should be cut into 1cm to 5cm square pieces.

[0018] 2. Separation of electrolyte from other solid contents

[0019] Use polar organic solvents, such as dichloromethane, chloroform, acetone, ethanol, etc., to wash out the electrolyte contained in the battery content, and separate the electrolyte solution from o...

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