Positive electrode material recovering method for waste lithium ionic cell

A lithium-ion battery and cathode material technology, which is applied in the field of recycling waste battery cathode materials, can solve the problems of long recycling process and high recycling cost, and achieve the effect of simple recycling method and low cost

Inactive Publication Date: 2009-08-05
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the disadvantages of long recycling process and high recycling cost of the recovery method of the positive electrode material of

Method used

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  • Positive electrode material recovering method for waste lithium ionic cell
  • Positive electrode material recovering method for waste lithium ionic cell

Examples

Experimental program
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Effect test

Embodiment 1

[0023] This example illustrates the recovery method of the positive electrode material of the spent lithium ion battery.

[0024] Soak 16 kilograms of LP463446ARU waste lithium-ion batteries (the positive electrode material is lithium cobalt oxide) in 35 kilograms of sodium chloride aqueous solution (the content of sodium chloride is 36.5% by weight) for 2 hours.

[0025] Cracks appear at the contact between the positive and negative electrodes of the battery, take out the battery and remove the battery case, separate the positive electrode sheet 6.5 kg, soak the positive electrode sheet in 15 kg of N-methylpyrrolidone at 70°C for 6 hours, and put the positive electrode material After elution, the current collector was taken out, and then filtered to obtain 5.66 kg of black powder. This black powder was mixed with 15 kg of hydrochloric acid solution (the concentration of hydrochloric acid was 30% by weight) for 30 minutes, so that the black powder was fully dissolved to obtain...

Embodiment 2

[0028] The recovery of the positive electrode material of the spent lithium ion battery was performed according to the method of Example 1, except that the aqueous electrolyte solution was an aqueous solution of sodium nitrate, wherein the content of sodium nitrate was 45% by weight.

[0029] The LiCoO 2 The X-ray diffraction analysis figure and scanning electron microscope figure of powder sample and the LiCoO that make in embodiment 1 2 Powder samples are similar.

Embodiment 3

[0031] According to the method of Example 1, the positive electrode material of the waste lithium ion battery is recovered, the difference is that the aqueous electrolyte solution is an aqueous solution of potassium sulfate, wherein the content of potassium sulfate is 10% by weight, and the soaking time is 5 hours.

[0032] The LiCoO 2 The X-ray diffraction analysis figure and scanning electron microscope figure of powder sample and the LiCoO that make in embodiment 1 2 Powder samples are similar.

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Abstract

The invention provides a method of recycling the anode material of a waste lithium-ion battery. The method comprises the following steps: the anode plate is separated from the waste lithium-ion battery and dipped in an organic solvent to separate the anode material from a current collector; the current collector is taken out; and the anode material can be obtained by filtering. The method of separating the anode plate from the waste lithium-ion battery comprises the steps: the waste lithium-ion battery is dipped in the aqueous solution of the electrolyte; the shell of the battery is stripped; and the anode plate is separated from the cathode plate. The content of the electrolyte in the aqueous solution of the electrolyte is 10 to 50 weight percent. The invention has the advantages of simple recycling method and low cost, and is applicable to the large-scale recycling treatment of lithium-ion batteries.

Description

technical field [0001] The invention relates to a method for recycling positive electrode materials of waste batteries, in particular to a method for recycling positive electrode materials of waste lithium ion batteries. Background technique [0002] Lithium-ion battery is a kind of green chemical power source, which has the advantages of high voltage, high energy density, light weight and long cycle life, and is widely used in various portable devices such as mobile phones and notebook computers. [0003] In recent years, due to the rapid development of these products in recent years, the amount of lithium-ion batteries is also increasing. Followed by the emergence of a large number of waste lithium-ion batteries, these waste lithium-ion batteries will undoubtedly pollute the environment without proper treatment. In addition, a large amount of cobalt is used in lithium-ion batteries, and cobalt is a scarce resource with expensive raw materials and high production costs. Th...

Claims

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Application Information

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IPC IPC(8): H01M10/54B09B3/00B09B5/00
CPCY02E60/12Y02W30/84
Inventor 邓廷辉俞晓慧韦建群先雪峰
Owner BYD CO LTD
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