Recycling method of spent lithium-ion battery cathode materials based on mechanochemical method

A technology of lithium-ion battery and mechanochemical method, which is applied in the field of recycling waste lithium-ion battery cathode materials, can solve the problems of low recovery rate, high cost, and great environmental hazards of waste liquid, and achieve low environmental hazards, low cost, High economical effect

Active Publication Date: 2021-04-06
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention solves the technical problems in the prior art that the recovery rate of valuable metals in the positive electrode material of the waste lithium ion battery is low, the generated waste liquid is harmful to the environment, and the cost is high

Method used

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  • Recycling method of spent lithium-ion battery cathode materials based on mechanochemical method
  • Recycling method of spent lithium-ion battery cathode materials based on mechanochemical method
  • Recycling method of spent lithium-ion battery cathode materials based on mechanochemical method

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Embodiment 1

[0029] A flexible leaching method for valuable metals in waste lithium-ion battery cathode materials based on mechanochemical method, figure 1 The present invention is a process flow diagram for leaching valuable metal elements such as lithium, cobalt, nickel, manganese from waste lithium ion battery positive electrode materials, comprising the following steps:

[0030] (1) Put 0.5 g of pretreated waste lithium-ion battery ternary positive electrode material, 1.0 g of potassium persulfate, 0.5 g of glucose and 80 g of zirconia grinding balls into a zirconia ball milling tank, and ball mill for 3 hours at a speed of 800 rpm.

[0031] (2) Transfer the mixed material after ball milling to 100mL deionized water and stir evenly, adjust the pH of the system to 2.0, stir magnetically at 50°C for 40min, cool to room temperature, and obtain a leachate containing lithium, cobalt, nickel, and manganese after filtration .

[0032]It has been determined that the leaching rates of lithium,...

Embodiment 2

[0034] A flexible leaching method for valuable metals in waste lithium-ion battery cathode materials based on mechanochemical method, figure 1 The present invention is a process flow diagram for leaching valuable metal elements such as lithium, cobalt, nickel, manganese from waste lithium ion battery positive electrode materials, comprising the following steps:

[0035] (1) Put 0.4g of the pretreated waste lithium-ion battery positive electrode material, 1.2g of ammonium persulfate, 0.4g of sucrose and 60g of zirconia grinding balls into a zirconia ball mill jar, and ball mill for 2 hours at a speed of 1000rpm.

[0036] (2) Transfer the mixed material after ball milling to 100mL deionized water and stir evenly, adjust the pH of the system to 2.0, stir magnetically at 60°C for 30min, cool to room temperature, and filter to obtain a leachate containing lithium, cobalt, nickel, and manganese .

[0037] It has been determined that the leaching rates of lithium, cobalt, nickel, an...

Embodiment 3

[0039] A flexible leaching method for valuable metals in waste lithium-ion battery cathode materials based on mechanochemical method, figure 1 The present invention is a process flow diagram for leaching valuable metal elements such as lithium, cobalt, nickel, manganese from waste lithium ion battery positive electrode materials, comprising the following steps:

[0040] (1) Put 0.4g of the pretreated waste lithium-ion battery positive electrode material, 1.0g of ammonium persulfate, 0.6g of sucrose and 200g of zirconia grinding balls into a zirconia ball mill jar, and ball mill for 10 hours at a speed of 100rpm.

[0041] (2) Transfer the mixed material after ball milling to 100mL deionized water and stir evenly, adjust the pH of the system to 2.0, stir magnetically at 60°C for 30min, cool to room temperature, and filter to obtain a leachate containing lithium, cobalt, nickel, and manganese .

[0042] It has been determined that the leaching rates of lithium, cobalt, nickel, a...

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Abstract

The invention discloses a method for recovering positive electrode materials of waste lithium ion batteries based on a mechanochemical method, belonging to the field of recycling waste lithium ion batteries. Grinding the positive electrode material of the waste lithium ion battery into powder, and fully mixing with an activator and an organic reducing agent, the activator can generate active free radicals to obtain a mixture, and the mixture is ball milled to make the positive electrode of the waste lithium ion battery The material undergoes plastic deformation, and lattice defects are generated in the crystal particles, so that the crystal particles undergo crystal transformation or amorphization; the ball-milled product is added to deionized water to leach valuable metal ions. The method in the present invention does not rely on high-concentration strong acid, strong alkali, strong redox reagent or expensive organic acid, etc., and takes the mechanochemical reaction in the solid phase as the main body of the reaction to realize the waste lithium ion extraction in a mild leaching environment. Efficient leaching of valuable metals such as lithium, cobalt, nickel, manganese and other valuable metals in battery cathode materials.

Description

technical field [0001] The invention relates to the field of recycling waste lithium ion batteries, in particular to a method for recycling positive electrode materials of waste lithium ion batteries based on a mechanochemical method. Background technique [0002] In the past ten years, with the increasing popularity of domestic new energy vehicles, the expanding scope of clean energy development, and the increasing penetration of portable electronic devices in daily life, my country's demand for secondary batteries has continued to rise, and the annual output of secondary batteries increase yearly. As a secondary battery with small size, light weight, long cycle life and high specific energy density, lithium-ion battery has become an important part of the power battery, energy storage battery and consumer battery market. The normal charge-discharge cycle life of lithium-ion batteries is 1000-3000 times, and the service life is 3-5 years. Therefore, the huge demand for lithi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00
CPCC22B7/007C22B23/0415C22B26/12C22B47/00H01M10/54Y02W30/84Y02P10/20
Inventor 胡敬平彭刚伟蔡晨刘露杨小容侯慧杰刘冰川杨家宽梁莎肖可可
Owner HUAZHONG UNIV OF SCI & TECH
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