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Method for efficiently recycling and regenerating positive electrode material of waste lithium ion battery

A technology for lithium ion batteries and cathode materials, which is applied in the field of efficient recovery and regeneration of cathode materials of waste lithium ion batteries, can solve the problems of refractory waste acid treatment, equipment corrosion, human and environmental hazards, etc., and achieves saving steps, reducing process operations, Reduced effect of use

Active Publication Date: 2020-12-22
CENT SOUTH UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Using inorganic acid to leach the positive electrode active material of waste lithium-ion battery can have a high leaching rate, but the acid concentration used in this process is high, which will cause corrosion to the equipment and release HCl and NO at the same time x , SO 3 and other toxic gas pollutants, and the waste acid after leaching is difficult to handle, which will also pose potential hazards to human body and environment

Method used

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  • Method for efficiently recycling and regenerating positive electrode material of waste lithium ion battery
  • Method for efficiently recycling and regenerating positive electrode material of waste lithium ion battery
  • Method for efficiently recycling and regenerating positive electrode material of waste lithium ion battery

Examples

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Effect test

Embodiment 1

[0040] Such as figure 1 As shown, the method for high-priced recovery and regeneration of spent lithium-ion battery cathode materials comprises the following steps:

[0041] S1. First discharge the waste lithium-ion battery thoroughly, disassemble and peel off, and soak the obtained positive pole piece in N-methylpyrrolidone solution for ultrasonication to accelerate the separation of the positive active material from the aluminum foil of the current collector. After separation, dry the solid powder Calcination to obtain the positive electrode LiNi of waste batteries 0.5 co 0.2 mn 0.3 o 2 The active material is ground for later use.

[0042] S2. Weigh an appropriate amount of benzenesulfonic acid and place it in a 250mL three-neck flask, add deionized water, the concentration of benzenesulfonic acid is 0.1mol / L, and after the organic acid is completely dissolved, add a certain amount of hydrogen peroxide into the flask to configure the leaching agent, hydrogen peroxide is...

Embodiment 2

[0048] Such as figure 1 As shown, the method for high-priced recovery and regeneration of spent lithium-ion battery cathode materials comprises the following steps:

[0049] S1. First discharge the waste lithium-ion battery thoroughly, disassemble and peel off, and soak the obtained positive pole piece in N-methylpyrrolidone solution for ultrasonication to accelerate the separation of the positive active material from the aluminum foil of the current collector. After separation, dry the solid powder Calcination to obtain the positive electrode LiNi of waste batteries 0.5 co 0.2 mn 0.3 o 2 Active materials are ground for use;

[0050] S2. Weigh an appropriate amount of ethanesulfonic acid and place it in a 250mL three-neck flask, add deionized water, the concentration of benzenesulfonic acid is 0.5mol / L, and after the organic acid is completely dissolved, add a certain amount of hydrogen peroxide into the flask to configure Leaching agent, hydrogen peroxide is 5% of the to...

Embodiment 3

[0056] Such as figure 1 As shown, the method for high-priced recovery and regeneration of spent lithium-ion battery cathode materials comprises the following steps:

[0057] S1. First discharge the waste lithium-ion battery thoroughly, disassemble and peel off, and soak the obtained positive pole piece in N-methylpyrrolidone solution for ultrasonication to accelerate the separation of the positive active material from the aluminum foil of the current collector. After separation, dry the solid powder Calcination to obtain the positive electrode LiNi of waste batteries 0.5 co 0.2 mn 0.3 o 2 Active material, ground for use;

[0058] S2. Weigh an appropriate amount of vinylsulfonic acid and place it in a 250mL three-neck flask, add deionized water, the concentration of benzenesulfonic acid is 0.4mol / L, and after the organic acid is completely dissolved, add a certain amount of hydrogen peroxide into the flask to configure Leaching agent, hydrogen peroxide is 3% of the total v...

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Abstract

The invention discloses a method for efficiently recycling and regenerating a positive electrode material of a waste lithium ion battery. The method comprises the following steps: completely discharging, disassembling, stripping, calcining and grinding the recycled waste lithium ion battery to obtain a LiNi0.5Co0.2Mn0.3O2 active material; leaching the active material by using a leaching agent to obtain a leaching solution rich in lithium and a precipitate containing nickel, cobalt and manganese; dispersing the obtained precipitate in water, adding alkali liquor, and adjusting the pH value to obtain nickel cobalt manganese hydroxide precipitate; filtering the nickel cobalt manganese hydroxide precipitate to obtain a ternary precursor, carrying out lithiation on the ternary precursor and anexcessive lithium source according to the amount of substance of the ternary precursor, performing grinding, mixing and calcining to obtain a positive electrode active material; adding inorganic acidinto filtrate obtained after filtering, generating new organic acid, and realizing recycling of the organic acid. By using the method provided by the invention, the ternary positive electrode materialcan be recycled, the process is simple, the processing cost can be effectively reduced, and the recycling of organic acid can be realized.

Description

technical field [0001] The invention relates to the technical field of recovering valuable metals from waste lithium ion batteries, in particular to a method for efficiently recovering and regenerating positive electrode materials of waste lithium ion batteries. Background technique [0002] The widespread use of lithium-ion batteries not only brings convenience to people, but also increases the amount of waste year by year. With the energy and mineral crisis and the increasing awareness of environmental protection, all countries are actively carrying out the recycling of waste lithium batteries, which has become a research hotspot in the field of solid waste treatment and recycling in recent years. At present, recycling research mainly focuses on lithium in positive active materials. , nickel, cobalt and other rare and precious metals. The recycling process of used lithium-ion batteries at home and abroad includes three steps: pretreatment, secondary treatment and advanced...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54H01M10/0525
CPCH01M10/0525H01M10/54Y02E60/10Y02W30/84
Inventor 纪效波邱雪景侯红帅邹国强
Owner CENT SOUTH UNIV
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