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A process for preparing lithium nickel manganese oxide by reverse recycling waste lithium batteries as raw materials

A technology for waste lithium batteries and lithium nickel manganese oxide, which is applied in battery recycling, recycling by waste collectors, battery electrodes, etc., can solve problems such as not being environmentally friendly, increasing wastewater treatment costs, and large separation potentials, so as to save costs and realize The effect of resource utilization and reduction of processing costs

Active Publication Date: 2016-05-25
GUANGDONG BRUNP RECYCLING TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of feeding materials is relatively high. If ammonia water is used as a precipitant, ammonia nitrogen wastewater will be generated, which is not environmentally friendly, but also increases the cost of wastewater treatment
[0005] Electrodeposition is currently a method for recovering elemental metals. However, due to the large distance between the precipitation potentials of nickel and manganese, it is easy to separate nickel oxide and manganese oxide during electrodeposition, and it is difficult to co-deposit to obtain nickel manganese oxide; Moreover, the ratio and total concentration of nickel and manganese ion concentrations in the reaction system have a great influence on the morphology and structure of nickel-manganese oxides, so there is no report to illustrate the optimal nickel and manganese ion concentrations of electrodeposited nickel-manganese oxides.

Method used

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  • A process for preparing lithium nickel manganese oxide by reverse recycling waste lithium batteries as raw materials
  • A process for preparing lithium nickel manganese oxide by reverse recycling waste lithium batteries as raw materials
  • A process for preparing lithium nickel manganese oxide by reverse recycling waste lithium batteries as raw materials

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Experimental program
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Effect test

Embodiment 1

[0034] (1) The battery cell was disassembled, and the positive electrode sheet was taken out; the positive electrode sheet was pulverized, pyrolyzed, and sieved with a 60-mesh standard sieve under vibration to obtain 1846 g of positive electrode powder.

[0035] (2) Dissolve the positive electrode powder in 10L of nitric acid, remove the insoluble matter by filtration, control the pH of the filtrate to 2, add 20L of extractant, and the component of the extractant is P with a volume fraction of 30%. 2 0 4 And the sulfonated kerosene whose volume fraction is 70%, the equilibrium time is 15min, then back extraction with 10L2mol / L nitric acid, the equilibrium time is 15min, the obtained solution is a mixed solution of nickel nitrate and manganese nitrate, and the nickel ion concentration in the solution is measured as 0.60mol / L, manganese ion concentration is 0.63mol / L.

[0036] (3) Add 54.84g of nickel nitrate to the mixed solution in step (2), so that the concentration ratio of...

Embodiment 2

[0042] (1) Disassemble the battery cell and take out the positive electrode sheet; crush the positive electrode sheet, pyrolyze it, and sieve it with a 60-mesh standard sieve under vibration to obtain 1950 g of positive electrode powder.

[0043] (2) Dissolve the positive electrode powder in 10L of hydrochloric acid, remove the insoluble matter by filtration, control the pH of the filtrate to 2, add 20L of extractant, the components of the extractant are P204 with a volume fraction of 30% and sulfonated with a volume fraction of 70%. Kerosene, the equilibrium time is 20min, back extraction with 10L2mol / L hydrochloric acid, the equilibrium time is 20min, the obtained solution is a mixed solution of nickel chloride and manganese chloride, the nickel ion concentration in the solution is 1.25mol / L, and the manganese ion The concentration is 2.2mol / L.

[0044] (3) Add 390g of manganese chloride to the mixed solution in step (2), so that the concentration ratio of nickel ions to manga...

Embodiment 3

[0050] (1) The battery cell was disassembled, and the positive electrode sheet was taken out; the positive electrode sheet was crushed, pyrolyzed, and sieved with a 60-mesh standard sieve under vibration to obtain 1872 g of positive electrode powder.

[0051] (2) Dissolve the positive electrode powder in 10L of sulfuric acid, remove the insoluble matter by filtration, control the pH of the filtrate to 3, add 20L of extractant, the components of the extractant are P204 with a volume fraction of 30% and sulfonate with a volume fraction of 70%. Kerosene, equilibrium time is 30min, back extraction with 10L2mol / L sulfuric acid again, equilibrium time is 30min, obtains solution and is the mixed solution of nickel sulfate and manganese sulfate, records the nickel ion concentration in the solution and is 1.2mol / L, manganese ion concentration is 1mol / L.

[0052] (3) Add 1240g of nickel sulfate to the mixed solution in step (2), so that the concentration ratio of nickel ions to manganes...

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Abstract

The invention discloses a process for preparing lithium nickel manganese oxide by reverse recycling using waste lithium batteries as raw materials, which is characterized in that it comprises the following steps: (1) taking the battery positive electrode sheet of the waste lithium ion battery and performing pretreatment to obtain positive electrode powder; 2) Dissolving the positive electrode powder in inorganic acid to remove impurities to obtain a mixed solution containing nickel and manganese; (3) adding nickel source or manganese source to the mixed solution; (4) adding acetate to complex agent, adjust the ratio of acetate concentration to the total concentration of metal ions; (5) place the mixed solution in an electrolytic cell for electrolysis, so that nickel-manganese oxide is deposited on the titanium sheet; (6) stop feeding the direct current, and take out the titanium sheet , separate the nickel-manganese oxide on the titanium sheet, and dry to obtain nickel-manganese oxide powder; (7) mix the nickel-manganese oxide powder and lithium source evenly, and then perform calcination to obtain lithium nickel-manganese oxide. This process can use the waste battery through the reverse recycling process to obtain a recycled product with the same performance as the original product, realizing resource utilization.

Description

technical field [0001] The invention relates to a process for preparing lithium nickel manganese oxide, in particular to a process for preparing lithium nickel manganese oxide by reverse recycling waste lithium batteries as raw materials. Background technique [0002] With the continuous development of the digital product industry, people's demand for batteries is increasing. Lithium nickel manganese oxide is an important cathode material for lithium batteries. It is widely produced and used, and has a large market demand. While lithium batteries are booming, it can be predicted that in the near future, when the battery life ends, it will enter the scrapping stage. Based on the current quantity of lithium batteries, it can be estimated that the amount of scrapping is equally huge. [0003] The positive electrode material of waste lithium batteries is lithium nickel manganese oxide, etc., which can be recycled and used to make metal powder, metal oxide, chemical salt, etc. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/48H01M10/54
CPCY02E60/10Y02W30/84
Inventor 欧彦楠李长东余海军
Owner GUANGDONG BRUNP RECYCLING TECH CO LTD
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