Method for processing separated active matter and aluminum in lithium ion battery positive plate

A technology for lithium ion batteries and cathode sheets, which is applied in battery recycling, aluminum chloride, aluminum halide, etc., can solve the problems of few types of organic solvents, high price, difficulty in separating PVDF, etc. High rate and good separation effect

Active Publication Date: 2013-04-24
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few types of organic solvents that can dissolve PVDF, the price is high, and the ability to dissolve PVDF is limited; although the solvent can be recycled, it is difficult to separate PVDF and the purification and separation cycle is short
The aluminum foil alkali dissolution method adopts strong alkali operation, which increases the acid consumption of subsequent acid dissolution, and the operating environment is poor; Al(OH) is generated 3 The particles are small and entrained with carbon powder particles and organic binder colloid, making it difficult to filter and wash; the obtained Al(OH) 3 High impurities, difficult to use
The method of pyrolysis of PVDF has poor separation effect and low recovery rate of active matter

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The dry and invalid lithium-ion battery positive electrode is continuously and directly fed into the chlorination reaction furnace through the tubular screw feeder. The temperature of the deoxidized and regenerated chlorine gas entering the chlorination furnace is 360~370°C, and the temperature is 360~380°C when the chlorination reaction is in progress; the material reaction (residence in the furnace) time 10min; continuous discharge by the discharge screw. The temperature of the preheated oxygen entering the oxidizer is 380~400°C, the flow rate is 0.090~0.092kg / min (according to the aluminum feed of 1.0kg / min), and the temperature when the oxidation reaction proceeds is about 360~390°C. The oxidation reaction product is collected by a dust collector to collect ultra-fine alumina, and the gas is deoxygenated by a deoxidizer. The temperature of the carbon layer in the deoxidizer is 380-400°C, and the deoxidation is about 2 minutes; And supplement chlorine gas according t...

Embodiment 2

[0047] The dry and invalid lithium-ion battery positive electrode sheet is continuously and directly fed into the chlorination reaction furnace through a tubular screw feeder. The temperature of the deoxidized and regenerated chlorine gas entering the chlorination furnace is 310~330°C, and the temperature when the chlorination reaction is in progress is about 300~330°C; The reaction (residence in the furnace) time is 30 minutes; the material is continuously discharged by the discharge screw. The temperature of the preheated oxygen entering the oxidizer is 300~320°C, the flow rate is 0.030~0.031kg / min (according to the aluminum feed of 1.0kg / min), and the temperature when the oxidation reaction proceeds is about 320~340°C. The oxidation reaction product is collected by a dust collector to collect ultra-fine alumina, and the gas is deoxygenated by a deoxidizer. The temperature of the carbon layer in the deoxidizer is 300-330°C, and the deoxidation is about 6 minutes; And supplem...

Embodiment 3

[0050] The dry and invalid lithium-ion battery positive electrode sheet is continuously and directly fed into the chlorination reaction furnace through a tubular screw feeder. The temperature of the deoxidized and regenerated chlorine gas entering the chlorination furnace is 330~350°C, and the temperature when the chlorination reaction is in progress is about 350~370°C; The reaction (residence in the furnace) time is 25 minutes; the material is continuously discharged by the discharge screw. The temperature of the preheated oxygen entering the oxidizer is 350~370°C, the flow rate is 0.036~0.037kg / min (according to the aluminum feed of 1.0kg / min), and the temperature is about 340~370°C when the oxidation reaction is in progress. The oxidation reaction product is collected by a dust collector to collect ultra-fine alumina, and the gas is deoxygenated by a deoxidizer. The temperature of the carbon layer in the deoxidizer is 350~380°C, and the deoxidation is about 5 minutes; And s...

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PUM

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Abstract

Provided is a method for processing separated active matter and aluminum in a lithium ion battery positive plate. After a failure lithium ion battery positive plate is smashed and dried, under the temperature of 300-380 DEG C, chlorine is piped in to carry out chlorination separating treatment, and hot volatile components and solid products containing positive active matters are obtained; and the hot volatile components are directly condensed to obtain aluminum chloride or are oxidized to obtain alumina. According to the method, the aluminum and the positive active matters are efficiently separated to facilitate later processing and machining; and the process is short in line, the separating effect is good, aluminum salt yield is high, and energy consumption is low.

Description

technical field [0001] The invention belongs to the field of resource recycling, and in particular relates to a method for separating aluminum and valuable active substances from positive plates of lithium-ion batteries. Background technique [0002] Lithium-ion batteries are modern advanced chemical power sources, widely used as power sources for consumer electronics, military products, aviation products, tools, and transportation products. They are also the preferred lightweight high-energy power batteries for future electric vehicles, and have a huge global market. Lithium-ion batteries have a similar structure to other chemical power sources: casing, battery cell, and electrolyte; the battery cell is composed of a positive electrode sheet, a negative electrode sheet, and a diaphragm in a certain structure. The positive electrode sheet is formed by coating the positive electrode material on the aluminum film, and the negative electrode sheet is formed by coating the negat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54C01F7/56C01F7/02
CPCY02E60/12Y02W30/84
Inventor 胡启阳李新海王志兴郭华军彭文杰
Owner CENT SOUTH UNIV
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