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Treatment method for waste LiMn1-x-yNixCoyO2 ternary battery cathode material

A technology for nickel-cobalt lithium manganese oxide and ternary batteries, which is applied in the field of processing positive electrode materials of waste nickel-cobalt lithium manganese oxide ternary batteries, can solve the problems of low recovery rate, cumbersome process, and impure products, and achieve improved recovery rate , The process is simple, and the effect of avoiding the separation of nickel, cobalt and manganese

Active Publication Date: 2015-12-30
浙江三晟化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the mainstream method of processing waste ternary cathode materials is to extract and separate the three elements of nickel, cobalt and manganese or chemical precipitation to obtain cobalt salts, nickel salts and manganese salts, and then carry out further processing, such as the patent No. 201110243034.X, which proposes The method of separating nickel-lithium and manganese-cobalt by carbonate precipitation, nickel by oxalate precipitation, lithium by phosphate precipitation, and cobalt by sulfide precipitation is realized. Although the full recovery of nickel-cobalt-manganese-lithium is realized, the recovery rate is low and the process Complicated, the obtained product is impure

Method used

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  • Treatment method for waste LiMn1-x-yNixCoyO2 ternary battery cathode material

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Embodiment 1

[0023] A kind of processing method of waste and old nickel-cobalt lithium manganese oxide ternary battery cathode material comprises the following steps:

[0024] (1) Pretreatment, the positive electrode material of the waste nickel-cobalt-lithium manganese oxide ternary battery is crushed and passed through an 80-mesh sieve, and the under-sieve is taken;

[0025] (2) Dissolve, add the undersieve to 2mol / l acid solution according to the solid-to-liquid ratio of 1:4, add the reducing agent according to 1 times the total molar number of cobalt, nickel and manganese, stir and react at 80°C for 5 hours, and the stirring speed is 200r / min, then carry out solid-liquid separation, obtain the first filtrate and the first filter residue;

[0026] (3) Remove impurities, adjust the pH of the first filtrate to 4.5 with lye, and at the same time add oxidant according to 2 times the total molar number of ferrous iron in the first filtrate, and add fluoride according to 4 times the molar nu...

Embodiment 2

[0037] A kind of processing method of waste and old nickel-cobalt lithium manganese oxide ternary battery cathode material comprises the following steps:

[0038] (1) Pretreatment, the positive electrode material of the waste nickel-cobalt lithium manganate ternary battery is crushed and passed through a 60-mesh sieve, and the under-sieve is taken;

[0039] (2) Dissolve, add the undersieve to 3mol / l acid solution according to the solid-liquid ratio of 1:5, add the reducing agent according to twice the total molar number of cobalt, nickel and manganese, stir and react at 90°C for 5 hours, and the stirring speed is 100r / min, then carry out solid-liquid separation, obtain the first filtrate and the first filter residue;

[0040] (3) Remove impurities, adjust the first filtrate to pH 5 with lye, add oxidizing agent according to 1.5 times the total moles of ferrous iron in the first filtrate, and add fluoride according to 3 times the moles of calcium and magnesium at the same time...

Embodiment 3

[0051] A kind of processing method of waste and old nickel-cobalt lithium manganese oxide ternary battery cathode material comprises the following steps:

[0052] (1) Pretreatment, the positive electrode material of the waste nickel-cobalt lithium manganate ternary battery is crushed and passed through a 60-mesh sieve, and the under-sieve is taken;

[0053] (2) Dissolve, add the undersieve to 3mol / l acid solution according to the solid-to-liquid ratio of 1:6, add the reducing agent according to twice the total molar number of cobalt, nickel and manganese, stir and react at 90°C for 5 hours, and the stirring speed is 200r / min, then carry out solid-liquid separation, obtain the first filtrate and the first filter residue;

[0054] (3) Remove impurities, adjust the pH of the first filtrate to 5 with lye, add oxidizing agent according to 1.25 times of the total moles of ferrous iron in the first filtrate, and add fluoride according to 2.7 times of the moles of calcium and magnesi...

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Abstract

The invention relates to a treatment method for a waste LiMn1-x-yNixCoyO2 ternary battery cathode material and belongs to the field of waste battery treatment. The method comprises the following steps: (1), pretreatment; (2), chemical dissolution; (3), chemical impurity removal; (4), extraction, deep impurity removal and enrichment of cobalt, nickel and manganese. By adopting the treatment method for the waste LiMn1-x-yNixCoyO2 ternary battery cathode material, the full utilization and directional circulation of nickel, cobalt and manganese in the waste LiMn1-x-yNixCoyO2 ternary battery cathode material can be realized, the comprehensive recovery rate of nickel, cobalt and manganese is high and the treatment cost is low.

Description

technical field [0001] The invention relates to a method for treating the positive electrode material of a waste nickel-cobalt lithium manganese oxide ternary battery, belonging to the field of waste battery treatment. Background technique [0002] With the rapid development of ternary battery materials, the annual demand has reached tens of thousands of tons. The power lithium battery route of ternary (or doped lithium manganate) materials will be the focus of the development of pure electric vehicles in the next 5 years. China is currently basically The lithium iron phosphate route is adopted, but because lithium iron phosphate is limited by the energy density, it is difficult to reach 150wh / kg. Among the future lithium battery technology routes, only ternary or silicon-based technology routes are expected to meet the target, but silicon-based lithium batteries are still far from industrialization. Very far away, ternary materials are the trend. In the next 3-5 years, the ...

Claims

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Application Information

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IPC IPC(8): H01M10/54C22B7/00
CPCH01M10/54Y02P10/20Y02W30/84
Inventor 刘嘉因
Owner 浙江三晟化工有限公司
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