Method for regenerating positive electrode active material in LiNi1/3Co1/3Mn1/3O2 waste lithium ion battery

A cathode active material, a technology of lithium nickel cobalt manganate, which is applied in the field of regeneration of cathode active materials, can solve the problems of atmospheric environment, water environment pollution, high requirements for anti-corrosion performance, and increase the cost of recycling, and achieves easy operation, The effect of low equipment anti-corrosion requirements and low regeneration cost

Active Publication Date: 2015-03-25
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Sulfuric acid, nitric acid, citric acid, and fluorine-containing organic acids are used to dissolve waste nickel-cobalt lithium manganate in the regeneration method of the positive active material in the lithium-ion battery of lithium-nickel-cobalt-manganate that has been reported so far. gas, NO x Exhaust gas and waste water with high acid content and organic content, which have caused serious pollution to the atmospheric environment and water environment
In addition, the dissolution process uses a higher acid concentration and adds hydrogen peroxide, which has high requirements on the anti-corrosion performance of the leaching equipment and increases the cost of recovery.
The subsequent treatment process after the dissolution of waste nickel cobalt lithium manganese oxide is relatively long, which also leads to high recycling costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Collect scrap lithium-ion batteries with nickel-cobalt lithium manganese oxide as positive electrode material, and place them in 1.0mol / L sodium hydroxide aqueous solution at room temperature for 2h discharge treatment; after discharge treatment, disassemble the scrap lithium-ion batteries , to obtain the positive electrode sheet; the ratio (g / mL) of the quality of the positive electrode sheet to the volume of the ceramic crucible is 1:15 and the positive electrode sheet is packed into the ceramic crucible, and then placed in a box-type resistance furnace from room temperature at 5 The heating rate of ℃ / min raised the temperature of the furnace to 550 ℃ and kept it warm for 20 minutes. According to the ratio of the mass of the positive electrode sheet to the volume of water (g / mL) of 1:50, put the positive electrode sheet into a container filled with water and use an electric motor to The stirrer stirred at a stirring speed of 50r / min for 20min, and the temperature of th...

Embodiment 2

[0025] Collect scrap lithium-ion batteries with nickel-cobalt lithium manganese oxide as positive electrode material, and place them in 1.0mol / L sodium hydroxide aqueous solution at room temperature for 2h discharge treatment; after discharge treatment, disassemble the scrap lithium-ion batteries , to obtain the positive electrode sheet; the ratio (g / mL) of the quality of the positive electrode sheet to the volume of the ceramic crucible is 1:15 and the positive electrode sheet is packed into the ceramic crucible, and then placed in a box-type resistance furnace from room temperature at 5 The heating rate of ℃ / min raised the temperature of the furnace to 550 ℃ and kept it warm for 20 minutes. According to the ratio of the mass of the positive electrode sheet to the volume of water (g / mL) of 1:50, put the positive electrode sheet into a container filled with water and use an electric motor to The stirrer stirred at a stirring speed of 50r / min for 20min, and the temperature of th...

Embodiment 3

[0027] Collect scrap lithium-ion batteries with nickel-cobalt lithium manganese oxide as positive electrode material, and place them in 1.0mol / L sodium hydroxide aqueous solution at room temperature for 2h discharge treatment; after discharge treatment, disassemble the scrap lithium-ion batteries , to obtain the positive electrode sheet; the ratio (g / mL) of the quality of the positive electrode sheet to the volume of the ceramic crucible is 1:15 and the positive electrode sheet is packed into the ceramic crucible, and then placed in a box-type resistance furnace from room temperature at 5 The heating rate of ℃ / min raised the temperature of the furnace to 550 ℃ and kept it warm for 20 minutes. According to the ratio of the mass of the positive electrode sheet to the volume of water (g / mL) of 1:50, put the positive electrode sheet into a container filled with water and use an electric motor to The stirrer stirred at a stirring speed of 50r / min for 20min, and the temperature of th...

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Abstract

The invention discloses a method for regenerating a positive electrode active material in a LiNi1/3Co1/3Mn1/3O2 waste lithium ion battery. The method includes the steps that the waste lithium ion battery is subjected to discharging and dismantling or positive pole leftover materials and positive electrode fragments are collected to obtain waste positive plates, and the waste positive plates are subjected to roasting, water dissolving and filtering to obtain waste LiNi1/3Co1/3Mn1/3O2 powder; the waste LiNi1/3Co1/3Mn1/3O2 powder and sodium pyrosulfate are roasted after being mixed according to a certain proportion, roasted products are leached by water, then a sodium carbonate solution is added into liquor, filtering is conducted, after the proportion of Li, Ni, Co and Mn in carbonate modulation filter residues is supplemented, the Li, Ni, Co and Mn are subjected to ball milling, compressing and roasting, and accordingly the LiNi1/3Co1/3Mn1/3O2 positive electrode material is obtained again. Components of filter liquor are adjusted through sulfuric acid, crystallization processing is carried out, and then sodium hydrogen sulfate is obtained.

Description

technical field [0001] The invention relates to the regeneration technology of positive electrode active materials in nickel-cobalt lithium manganese oxide waste lithium ion batteries. Background technique [0002] Lithium-ion batteries are a new generation of secondary batteries developed rapidly in the 1990s, and are widely used in small portable electronic communication products and electric vehicles. According to statistics, in 2009, the output of lithium-ion batteries in my country reached 1.87 billion, and in 2010, the output of lithium-ion batteries in my country reached 2.68 billion. Since the service life of lithium-ion batteries is generally 2-3 years, the problems of environmental pollution and resource waste caused by discarded lithium-ion batteries have become increasingly prominent. The problem of how to properly dispose of discarded lithium-ion batteries cannot be ignored. The recycling and reuse of resources such as Co, Ni, Mn, Li, Al, and Cu in waste lithiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54
CPCY02W30/84H01M10/54
Inventor 王大辉文豪陈怀敬
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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