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Method for synchronously separating and recycling cobalt, lithium and manganese from cathode material of waste lithium ion battery

A lithium-ion battery and positive electrode material technology, which is applied in the field of waste lithium battery waste treatment and resource recycling, can solve the problems of limited mass transfer of electron acceptors, high impurity content in leachate, and poor microbial tolerance, so as to reduce production capacity and disposal costs, saving resources and energy, and easy operation

Active Publication Date: 2018-11-13
KANFORT JIANGMEN ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, biohydrometallurgy technology also has its inherent problems, such as long leaching period, high impurity content in leaching solution, limited mass transfer of electron acceptors and nutrients, poor microbial tolerance, cobalt, lithium, manganese, nickel and other elements in the leaching solution Coexistence, it still needs secondary separation, etc.

Method used

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  • Method for synchronously separating and recycling cobalt, lithium and manganese from cathode material of waste lithium ion battery
  • Method for synchronously separating and recycling cobalt, lithium and manganese from cathode material of waste lithium ion battery
  • Method for synchronously separating and recycling cobalt, lithium and manganese from cathode material of waste lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 Effect of surface-modified activated carbon addition of different proportions of active agent mixture on the recovery efficiency of cobalt, manganese and lithium

[0025]Disassemble the used lithium-ion battery and take out the positive electrode material foil. The cathode material foil was pulverized, and put into an ultrasonic cleaner together with N-methyl-2-pyrrolidone for cleaning for five minutes. The cathode material fragments were taken out, washed three times with deionized water, and then dried for later use to obtain the cathode material for lithium ion batteries. Soak commercial activated carbon in a mixture containing 8% by mass of 2-ethylhexylphosphonic acid mono-2-ethylhexyl (PC-88A) and 3% by mass of tri-n-octylamine (TOA) In the three groups of mixed solutions containing 10% by mass PC-88A and 5% by mass TOA activator, 12% by mass PC-88A and 7% by mass TOA activator, mechanically stirred for 2 hour, then take it out and rinse it three times ...

Embodiment 2

[0033] Example 2 The effect of mixed matrix powder addition in different mixing ratios on cobalt, manganese, and lithium recovery efficiency

[0034] The hematite powder, the pyrite powder, and the positive electrode material of the lithium ion battery were mechanically ball milled for 2 hours respectively. The sample area of ​​the electrolytic cell was equally divided into four sub-areas with a polyethylene grid with a pore size of 0.25 mm. Soak commercial activated carbon in 12% 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (PC-88A) and 7% tri-n-octylamine (TOA) activator mixture, mechanically stir for 2 hour, then take it out and rinse it three times with deionized water, and dry it for subsequent use to obtain surface-modified activated carbon powder. The lithium-ion battery cathode material, elemental sulfur and pyrite powder prepared in Example 1 were dried at a constant temperature until the water content was less than 2%, and then sieved. In parts by mass, weig...

Embodiment 3

[0040] Embodiment 3 The common influence of voltage gradient and electrolyzer running time on cobalt, lithium, manganese recovery efficiency

[0041] The hematite powder, the pyrite powder, and the positive electrode material of the lithium-ion battery were mechanically milled for 4 hours respectively. The sample area of ​​the electrolytic cell was equally divided into four sub-areas with a polyethylene grid with a pore size of 0.5 mm. Dry the lithium ion battery cathode material, elemental sulfur and pyrite powder prepared in Example 1 at a constant temperature until the water content is less than 2%, and then sieve. In parts by mass, weigh mixed matrix powder: lithium-ion battery cathode material, elemental sulfur, and pyrite powder (5 parts, 5 parts, 90 parts) and stir evenly and add to the S2 area of ​​the electrolytic cell. Fill the hematite powder equal to the mixed matrix powder and the surface-modified activated carbon powder prepared in Example 2 into the S1 and S4 a...

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Abstract

The invention discloses a method for synchronously separating and recycling cobalt, lithium and manganese from a cathode material of a waste lithium ion battery. The method comprises the following steps of firstly, uniformly dividing a sample area of an electrolytic cell into four subareas by a polyethylene grid, respectively filling the same amount of solid powder, and slowly injecting deionizedwater into the third subarea; inoculating a sulfur oxide thiobacillus solution into the second subarea, placing the electrolyte cell after inoculating for 2 to 4 days at the room temperature, connecting the electrolyte cell and a direct-current power source through a cathode and an anode, and maintaining the electrolyte cell to run for 9 to 18 days; collecting the activated carbon, cathode precipitate and cathode liquid, so as to separate and recycle the cobalt, lithium and manganese from the cathode material of the waste lithium ion battery. The method has the advantages that the recycling process is greatly simplified, the operation is simple and convenient, the feasibility is strong, the production amount of secondary pollution waste liquid and the treatment cost in the process are reduced, and the resource and energy source are certainly saved.

Description

technical field [0001] The invention belongs to the research field of waste lithium battery waste treatment and resource recovery and utilization, and specifically relates to a method to realize the extraction of three elements of cobalt, lithium and manganese in the positive electrode material of waste lithium ion batteries under the premise of normal temperature environment and leaching ions without secondary separation. A method for efficient separation and recovery. Background technique [0002] Single crystal cobalt minerals are very rare on the earth, and cobalt mainly exists in arsenic-cobalt ore, copper-cobalt ore, nickel-cobalt ore and other minerals. In recent years, the growth rate of global cobalt production has been close to zero, which has severely restricted the expansion of the lithium-ion battery (LIB) industry. Lithium (Li) is widely used in lithium batteries, and its supply imbalance has led to the current lithium carbonate (Li 2 CO 3 ) The market price...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54C22B7/00
CPCC22B7/007H01M10/54Y02P10/20Y02W30/84
Inventor 黄涛刘龙飞陶骏骏周璐璐
Owner KANFORT JIANGMEN ENVIRONMENTAL TECH CO LTD
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