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Novel high-efficient comprehensive utilization method for recycling waste lithium-ion battery

A lithium-ion battery, waste technology, applied in the direction of battery recycling, recycling technology, solid waste removal, etc., can solve the problems of secondary pollution, many separation steps, high energy consumption of heat treatment, etc., to achieve no secondary pollution, recycling The effect of high efficiency and simple process

Inactive Publication Date: 2012-08-15
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The operating conditions are mild, and the leaching temperature is generally lower than 80°C, but the composition of the leaching liquid is complex, there are many separation steps, and a large amount of secondary waste liquid is generated
The recovery technology combining calcination and leaching mainly includes crushing (or peeling), incineration, heat treatment, leaching and separation, etc., which is characterized by a relatively simple process, but the heat treatment energy consumption of this method is high, and the recovery rate of electrolyte and resources is not high. Other components in the electrolyte and electrodes are converted into gases such as carbon dioxide and other harmful components (such as phosphorus pentoxide, etc.) through combustion, which will cause secondary pollution
To sum up, the existing lithium-ion battery recycling technology has the problems of low recycling efficiency and serious secondary pollution. A safe, efficient and environmentally friendly new technology is urgently needed to promote the recycling of waste lithium-ion batteries.

Method used

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  • Novel high-efficient comprehensive utilization method for recycling waste lithium-ion battery
  • Novel high-efficient comprehensive utilization method for recycling waste lithium-ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Such as figure 1 As shown, in this embodiment, first, the lithium ion battery is crushed with a shear crusher in an aqueous medium and the positive and negative materials are peeled off from the positive and negative plates; the polyethylene film is removed by flotation washing Or polypropylene film and plastic casing, dried at 60°C, the filtered filtrate was treated with saturated lime water and recycled, the filter residue was dried at 120°C, and after drying, the aluminum foil and copper foil of the positive and negative plates were separated by electro-separation. Metal conductors such as metal shells; put the lithium cobalt oxide and acetylene black mixture remaining in the electro-selection into the material boat or directly in the furnace, 10Pa, 1000 °C for 4 hours, and the condenser temperature is 400 °C. After the treatment, lithium metal is recovered in the condenser. The residue in the material boat or furnace is separated by magnetic separation to recover c...

Embodiment 2

[0019] Such as figure 1 As shown, in this embodiment, first, the lithium ion battery is crushed with a shear crusher in an aqueous medium and the positive and negative materials are peeled off from the positive and negative plates; the polyethylene film is removed by flotation washing Or polypropylene film and plastic casing, dried at 60°C, the filtrate after filtration was treated with saturated lime water and recycled, the filter residue was dried at 105°C, and after drying, the aluminum foil and copper foil of the positive and negative plates were separated by electro-separation. Metal conductors such as metal shells; put the mixture of lithium cobaltate and acetylene black remaining in the electro-selection into the material boat or directly in the furnace, react at 100Pa, 1100°C for 4h, and the temperature of the condenser is 400°C. After the treatment, lithium metal is recovered in the condenser. The residue in the material boat or furnace is separated by magnetic separ...

Embodiment 3

[0021] Such as figure 1 As shown, in this embodiment, first, the lithium ion battery is crushed with a shear crusher in an aqueous medium and the positive and negative materials are peeled off from the positive and negative plates; the polyethylene film is removed by flotation washing Or polypropylene film and plastic casing, dried at 60°C, the filtered filtrate was treated with saturated lime water and recycled, the filter residue was dried at 120°C, and after drying, the aluminum foil and copper foil of the positive and negative plates were separated by electro-separation. Metal conductors such as metal shells; put the mixture of lithium cobalt oxide and acetylene black remaining in the electro-selection into the material boat or directly in the furnace, react at 1000Pa, 1200°C for 4h, and the temperature of the condenser is 400°C. After the treatment, lithium metal is recovered in the condenser. The residue in the material boat or furnace is separated by magnetic separatio...

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Abstract

The invention discloses a novel high-efficient comprehensive utilization method for recycling a waste lithium-ion battery, comprising three steps, namely a pretreatment step, a separation step and a vacuum thermal treatment step, wherein the pretreatment specifically comprises the following steps of: crushing the waste lithium-ion battery in a water medium by utilizing a shear type crusher, and peeling off positive-negative electrode materials from a polar plate; the separation step specifically comprises the following steps of: separating and recovering a polyethylene film or a polypropylene film, a plastic shell and the like floating on the surface of the water medium according to different densities of all components in the waste lithium-ion battery, filtering, treating the filtrate and recycling; and the vacuum thermal treatment step specifically comprises the following steps of: placing the nonconductor waste lithium-ion battery positive-negative electrode materials, namely lithium cobaltate and acetylene black obtained by the separation process, in a material boat or a hearth directly to carry out vacuum thermal treatment. The novel high-efficient comprehensive utilization method disclosed by the invention has the advantages of simple flow process and high recovery efficiency, no need of a reducing agent and no secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a waste lithium ion battery resource treatment and disposal, in particular to a novel high-efficiency waste lithium ion battery resource comprehensive utilization method, which is suitable for the regeneration and utilization of metal cobalt and metal lithium resources. Background technique [0002] Since Japan's Sony Corporation successfully launched commercial lithium-ion batteries for the first time in 1991, it has the advantages of high voltage, small size, light weight, high specific energy, no memory effect, no pollution, small self-discharge, and long life. , Widely used in civil and military applications such as mobile phones, notebook computers, video cameras, digital cameras, etc. my country is the world's largest user of mobile phones, and also the world's largest producer and user of lithium-ion batteries. In 2004, my country's lithium-ion battery outp...

Claims

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Application Information

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IPC IPC(8): H01M10/54B09B3/00
CPCY02W30/84
Inventor 陈梦君陈海焱王建波谌书黄金秀
Owner SOUTHWEAT UNIV OF SCI & TECH
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