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Method for recycling active materials and aluminum foil from waste lithium-ion battery cathode materials

A technology for lithium ion batteries and positive electrode materials, applied in the field of recycling, can solve the problems of large burden of impurity removal process, high recycling cost, long process flow, etc., and achieve the effects of easy large-scale industrial production, low recycling cost and simple process

Inactive Publication Date: 2017-09-05
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a long process flow, a large consumption of reagents, a large burden on the subsequent impurity removal process, and high recovery costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The waste lithium-ion battery was soaked in 1.8% sodium chloride solution for 24 hours for discharge treatment, then manually disassembled and cut into small pieces of 5cm×5cm, and a total of 100g of positive electrode pieces were collected; 500mL of 1 mol / L sulfuric acid solution was prepared and placed in In a 3000 mL beaker, heat up the water bath to 60°C, put the cut positive electrode sheet and soak for 10 min to separate the positive electrode active material from the aluminum foil;

[0022] Pull out the aluminum foil, wash it with water twice, weigh it after natural drying, and obtain a total of 10.2 g of aluminum foil; filter the solution containing the positive electrode active material with a Bush funnel, wash and dry the filter residue to obtain 88 g of positive electrode active material, and the positive electrode active material obtained by stripping into Valuable metals are recovered in the wet leaching process, and the filtrate is used as slurry in the wet...

Embodiment 2

[0024] Soak the waste lithium-ion batteries in 3.5% sodium chloride solution for 32 hours for discharge treatment, then manually disassemble and cut them into small pieces of 5cm×8cm, and collect a total of 1Kg of positive electrodes; prepare 3L of 2 mol / L sulfuric acid solution, place in In a 5L beaker, heat up the water bath to 50°C, put the cut positive electrode sheet and soak for 6 minutes to separate the positive electrode active material from the aluminum foil; take out the aluminum foil and rinse it twice with water, dry it naturally, and weigh it to obtain a total of 112g of aluminum foil; The solution containing the positive electrode active material was filtered with a Bush funnel, and the filter residue was washed and dried to obtain 870.5 g of positive electrode active material. The positive electrode active material obtained by stripping entered the wet leaching process to recover the valuable metals therein, and the filtrate was used as the slurry in the wet leach...

Embodiment 3

[0026] The waste lithium-ion battery was soaked in 5% sodium chloride solution for 48 hours for discharge treatment, then manually disassembled and cut into 5cm×10cm small pieces, and a total of 1Kg of positive electrode pieces were collected; a total of 3.5L of 2.5 mol / L sulfuric acid solution was prepared, Put it in a 5L beaker, raise the temperature to 60°C in a water bath, put the cut positive electrode sheet and soak it for 2 minutes to separate the positive electrode active material from the aluminum foil; take out the aluminum foil and rinse it twice with water, dry it naturally and weigh it to obtain a total of 120g aluminum foil The solution containing the positive active material is filtered with a Bush funnel, and the filter residue is washed and dried to obtain 862.5 g of the positive active material, and the positive active material obtained by stripping enters the valuable metals in the wet leaching process to reclaim, and the filtrate is used as the wet leaching p...

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Abstract

The invention discloses a method for recycling active materials and aluminum foil from waste lithium-ion battery cathode materials, and belongs to the technical field of electrode material recycling. The method comprises the steps that waste lithium-ion batteries are discharged, disassembled and then cut, and cathode sheets are obtained; the cathode sheets are put into a sulfuric acid solution to be soaked for 2 min to 10 min to enable cathode active materials to be separated from aluminum foil, wherein the concentration of the sulfuric acid solution ranges from 1.0 mol / L to 3.0 mol / L, and the temperature of the sulfuric acid solution ranges from 40 DEG C to 60 DEG C; and the aluminum foil is taken out, washed and dried, the dried aluminum foil is obtained, the solution containing the cathode active materials is filtered, filter residues are washed and dried, the cathode active materials are obtained, the cathode active materials are subjected to a wet leaching process, valuable metals in the cathode active materials are recycled, and filtrate is recycled or serves as a slurrying liquid of the wet leaching process. According to the method for recycling the active materials and aluminum foil from the waste lithium-ion battery cathode materials, the problem that the cathode active materials and the aluminum foil cannot be effectively and thoroughly separated in the waste lithium-ion battery recycling process is solved, the technology is simple, the flow is short, the recycling cost is low, large-scale industrial production is easy to achieve, secondary pollution is not generated in the recycling process, and the method is friendly to the environment.

Description

technical field [0001] The invention belongs to the technical field of recycling electrode materials, and relates to a method for recycling active materials and aluminum foil from waste lithium-ion battery cathode materials. Background technique [0002] With the increase in energy demand and the continuous development of the electronic market and electric vehicle market, lithium-ion batteries are favored by consumers due to their safety, environmental protection, high specific energy and good electrochemical performance. At present, it is widely used in various portable electrical appliances such as mobile phones, laptop computers, and toys. [0003] At present, my country has become the largest producer, consumer and exporter of lithium-ion batteries. According to the data of the National Bureau of Statistics, the output of lithium-ion batteries in my country was about 4.8 billion in 2013, and it is estimated that by 2020, the production of lithium-ion batteries in China ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00H01M10/54
CPCC22B7/007H01M10/54Y02P10/20Y02W30/84
Inventor 常全忠李兰兰王甲琴柴艮风甘梅陈天翼常雪洁王红忠
Owner JINCHUAN GROUP LIMITED
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