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Method for recovering transition metals from waste lithium-ion battery cathode materials containing at least one of CO and Mn or their precursors

A technology for lithium ion batteries and cathode materials, which is applied in the field of lithium ion battery cathode materials or their precursors for recovering transition metals, can solve the problems of excessive chlorine residues, affecting sintering, and harsh working conditions, and achieves less environmental pollution and faster reaction. Speed, good working conditions

Active Publication Date: 2016-01-13
宁夏中色金辉新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But above-mentioned method not only has chlorine gas and hydrogen chloride gas to volatilize in the operation process, and environmental pollution is big, and operating environment is poor, working condition is bad, and when the nickel-cobalt-manganese chloride salt that obtains is re-prepared into multi-element material, due to chloride ion to stainless steel The equipment is severely corroded, so plastic equipment is required, and the operation is complicated. At the same time, there are many residual chlorine radicals that are not easy to remove, which will affect the sintering, and then adversely affect the performance of the multi-component material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Mechanical exfoliation of LiNi from spent lithium-ion battery cathode sheets using Al foil as current collector 0.8 co 0.2 o 2 , 150g of the LiNi 0.8 co 0.2 o 2 Add to 1L of sulfuric acid solution with a concentration of 0.1mol / L, stir for 30 minutes and then filter, and wash the filter cake with 50°C water for 20 minutes;

[0069] Add the washed filter cake to 1L of water at 60°C, stir and disperse, and then slowly add 300mL of concentrated sulfuric acid with a concentration of 98% to it under slow stirring to obtain a mixed solution;

[0070] Heat the mixed solution, and when the temperature rises to 95°C, start to add hydrazine hydrate with a concentration of 80% to it for reaction. The hydrazine hydrate is added in 5 times, and the total amount added is 2mL. After adding hydrazine hydrate, continue heating 5 minutes;

[0071] After the reaction is completed, use ammonium carbonate to adjust the pH to 4-6, then use a microfiltration membrane to filter, remove t...

Embodiment 2

[0074] Get 150g lithium-ion battery cathode material factory waste LiNi 0.5 co 0.2 mn 0.3 o 2 , added to 1L of water at 60°C, stirred to disperse, and then slowly added 300mL of concentrated sulfuric acid with a concentration of 98% to it under slow stirring to obtain a mixed solution;

[0075] Heat the mixed solution, and when the temperature rises to 95°C, start to add hydrazine hydrate with a concentration of 80% to it for reaction. The hydrazine hydrate is added in 4 times, and the total amount added is 4mL. After adding hydrazine hydrate, continue heating 5 minutes;

[0076] After the reaction is completed, use sodium bicarbonate to adjust the pH to 4-6, then use a microfiltration membrane to filter, remove the filter residue, and collect the filtrate to obtain an aqueous sulfate solution containing Li, Ni, Co, and Mn.

[0077] The filter residue that adopts the method detection of elemental analysis to produce, result shows, wherein Ni, Co, Mn content are less than 0...

Embodiment 3

[0079] Get 150g production waste Ni 0.4 co 0.2 mn 0.4 (OH) 2 , added to 1L of water at 40°C, stirred to disperse, and then slowly added 450mL of concentrated sulfuric acid with a concentration of 98% to it under slow stirring to obtain a mixed solution;

[0080] Heat the mixed solution, and when the temperature rises to 100°C, start to add hydrazine hydrate with a concentration of 80% to it for reaction. The hydrazine hydrate is added in 5 times, and the total amount added is 5mL. After adding hydrazine hydrate, continue heating 10 minutes;

[0081] After the reaction is completed, use sodium carbonate to adjust the pH to 4-6, then use a microfiltration membrane to filter, remove the filter residue, and collect the filtrate to obtain a sulfate aqueous solution containing Ni, Co, and Mn.

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PUM

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Abstract

The invention provides a method for recycling transition metal from a waste lithium ion battery positive pole material or precursor thereof containing at least one of Mn and Co. The method comprises the following steps of: firstly mixing the waste lithium ion battery positive pole material or precursor thereof containing at least one of Mn and Co with water and concentrated sulfuric acid, so as to obtain mixed liquor, with the concentration of the concentrated sulfuric acid in the mixed liquor being of 5 to 8.5mol / L, then raising the temperature of the mixed liquor to be 95 to 100 DEG C, and ensuring that the mixed liquor is mixed and reacted with any one of hydrazine hydrate, triethanolamine and polyatomic alcohol, so as to obtain a solution of transition metal ions, containing at least one of Co and Mn. According to the method, a system containing concentrated sulfuric acid and any one of hydrazine hydrate, triethanolamine and polyatomic alcohol is adopted to recycle transition metal from the waste lithium ion battery positive pole material or precursor thereof containing at least one of Mn and Co, and the method has the advantages that environment pollution is low, labor conditions are good, impurities are not introduced, the method is simple and convenient to operate, the efficiency is high, the cost is low, and the like.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a method for recovering transition metals from waste lithium ion battery anode materials containing at least one of Co and Mn or their precursors. Background technique [0002] Since the commercialization of lithium-ion batteries in the 1990s, due to their advantages in high energy density, light weight, high voltage, long service life, and ease of miniaturization and miniaturization, lithium-ion batteries have been rapidly used in mobile phones, notebook computers and digital devices. Cameras and other communications and portable digital products and other fields. In recent years, countries have developed lithium-ion battery electric vehicles and other electric vehicles one after another to alleviate the oil and other energy crises and reduce environmental pollution. Therefore, lithium-ion batteries have begun to enter the field of power batteries, and their develo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54
CPCY02W30/84
Inventor 晁锋刚贾廷庆李志林
Owner 宁夏中色金辉新能源有限公司