Method for recovering positive pole material of Li-ion battery

A lithium-ion battery and cathode material technology, applied in the field of battery cathode material recycling, can solve problems such as high cost, low recycling efficiency, and many processes, and achieve the effect of reducing recycling procedures, reducing recycling costs, and high application value

Inactive Publication Date: 2008-07-02
SHANGHAI BYD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of low recovery efficiency, many procedures and high cost of lithium-ion battery cathode materials in the prior art, and provide a method for lithium-ion battery cathode materials with high recovery efficiency, fewer procedures and low cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This example illustrates the method for recycling the battery cathode material of the present invention.

[0023] 500 grams of the positive sheet of the lithium-ion battery to be recycled (containing positive electrode active material LiCoO 2 440 grams) is soaked in 2.5L organic solvent, and described organic solvent contains the N of 2L, the ethanol of N-dimethylformamide and 0.5L, and the temperature of described organic solvent is 40 ℃, carries out ultrasonic oscillation ( The ultrasonic frequency is 50KHz), the soaking time is 20 minutes, and then the current collector is taken out, and the organic solvent is filtered. The obtained filtrate was baked at 100° C. for 1 hour to obtain the positive electrode active material A1. Table 1 shows the weight and recovery rate of the recovered positive electrode active material A1.

[0024] Wherein, the recovery rate=the weight of the positive electrode active material recovered / the positive electrode sheet contained in the ...

Embodiment 2

[0031] The positive electrode material is reclaimed according to the method of Example 1, and the difference is that the consumption of the organic solvent is 5L, and the organic solvent contains 3L of N, N-dimethylformamide and 2L of ethanol, and the amount of the organic solvent The temperature is 50° C., and the soaking time is 30 minutes. Finally, positive electrode active material A2 was obtained. Table 1 shows the weight and recovery rate of the recovered positive electrode active material A2.

Embodiment 3

[0033] Reclaim positive electrode material according to the method for embodiment 1, difference is, the amount of described organic solvent is 6L, and described organic solvent contains the N of 5L, the acetone of N-dimethylformamide and 1L, the temperature of described organic solvent 60°C, soaking time is 40 minutes. Finally, positive electrode active material A3 was obtained. Table 1 shows the weight and recovery rate of the recovered positive electrode active material A3.

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PUM

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Abstract

The invention relates to a method for recycling anode material of a lithium ion battery, which includes the processes: organic solvent is used for soaking anode plates of the battery so as to separate the anode material from a current collector; the current collector is taken out and filtered to obtain anode active substances; the anode active substances are parched. The organic solvent is the mixed solvent of the N, N - dimethylformamide and liquid alcohol and/or liquid ketone. By adopting the mixed solvent, the invention greatly promotes the recycling efficiency of the anode material; in the method of the invention, the recycling rate of the anode material is higher by over 20 per cent compared with the prior art in the situation of adopting different used organic solvent but other same conditions; besides, by adopting the method provided by the invention, the needed production time is greatly shortened and the production efficiency is promoted.

Description

technical field [0001] The invention relates to a method for recycling positive electrode materials of batteries, in particular to a method for recycling positive electrode materials of lithium ion batteries. Background technique [0002] Lithium-ion battery is a new type of chemical power supply, which meets the requirements of the development of modern electronic products. This new battery technology has high energy density, high voltage, no pollution, no metal lithium, high cycle life, and no memory effect , fast charging and so on. Therefore, it is widely used in electronic equipment such as personal computers, mobile phones, and portable appliances. [0003] However, in the production process of lithium-ion batteries, a large amount of positive electrode residues and scrapped positive electrode sheets will be produced, and a large number of discarded batteries will also be produced in daily life. If these positive electrode materials are not recycled and discarded dir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54B09B3/00B09B5/00
CPCY02W30/84
Inventor 沈晞王晕
Owner SHANGHAI BYD
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