Recovery method for waste lithium ion battery anode materials based on mechano-chemical method

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

Active Publication Date: 2020-02-14
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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  • Recovery method for waste lithium ion battery anode materials based on mechano-chemical method
  • Recovery method for waste lithium ion battery anode materials based on mechano-chemical method
  • Recovery method for waste lithium ion battery anode materials based on mechano-chemical 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 filter to obtain a leachate containing lithium, cobalt, nickel, and manganese .

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

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 recovery method for waste lithium ion battery anode materials based on a mechano-chemical method, and belongs to the field of waste lithium ion battery recycling. The waste lithium ion battery anode materials are ground into powder, the powder is sufficiently and evenly mixed with an activating agent and an organic reducing agent, the activating agent can generate activefree radicals, a mixture is obtained, the mixture is subjected to ball grinding, the waste lithium ion battery anode materials generate plastic deformation, lattice imperfection is generated in crystal particles, and the crystal particles generate crystal transfer or are not crystallized; and products obtained after ball grinding are added into deionized water, and valuable metal ions are leached.The method does not depend on high-concentration strong acid, strong base, strong oxidization reducing reagents, expensive organic acid and the like, the mechano-chemical reaction in a solid phase isadopted as a reaction body, and efficient leaching of valuable metal lithium, cobalt, nickel, manganese and the like in the waste lithium ion battery anode materials is achieved under the mild leaching environment.

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 Applications(China)
IPC IPC(8): C22B7/00C22B26/12C22B23/00C22B47/00H01M10/54
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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