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Method for recycling positive electrode material of waste nickel-cobalt-manganese ternary lithium battery

A technology of ternary lithium battery and cathode material, applied in battery recycling, waste collector recycling, secondary battery, etc., can solve problems such as complex recycling operation

Pending Publication Date: 2021-05-18
JIANGSU HELPER FUNCTIONAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method does not need to use extractant and organic solvent, which reduces pollution, but the recovery operation is more complicated

Method used

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  • Method for recycling positive electrode material of waste nickel-cobalt-manganese ternary lithium battery

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Effect test

Embodiment 1

[0027] Such as figure 1 As shown, the recovery process of the waste nickel-cobalt-manganese ternary lithium battery cathode material in this embodiment is as follows:

[0028] S1, put the waste nickel-cobalt-manganese ternary lithium battery in 1.5mol / L NaCl solution for discharge treatment, wash and dry the waste nickel-cobalt-manganese ternary lithium battery after discharge, disassemble and peel off, and obtain the powder form positive electrode material; the concentration is 5.0wt% sulfuric acid solution to the positive electrode material leaching of waste nickel-cobalt-manganese ternary lithium battery for 10 ~ 60min, the solid-liquid ratio of positive electrode material and sulfuric acid solution is 50g / g; the slurry obtained after leaching Material is through pressure filtration, obtains the leach solution A containing nickel-cobalt-manganese-lithium;

[0029] S2, adding sulfuric acid solution with a concentration of 2.0wt% and hydrogen peroxide with a concentration of...

Embodiment 2

[0041] Such as figure 1 As shown, the recovery process of the waste nickel-cobalt-manganese ternary lithium battery cathode material in this embodiment is as follows:

[0042] S1, put the waste nickel-cobalt-manganese ternary lithium battery in 1.5mol / L NaCl solution for discharge treatment, wash and dry the waste nickel-cobalt-manganese ternary lithium battery after discharge, disassemble and peel off, and obtain the powder form positive electrode material; the concentration is 5.0wt% sulfuric acid solution to the positive electrode material leaching of waste nickel-cobalt-manganese ternary lithium battery for 10 ~ 60min, the solid-liquid ratio of positive electrode material and sulfuric acid solution is 50g / g; the slurry obtained after leaching Material is through pressure filtration, obtains the leach solution A containing nickel-cobalt-manganese-lithium;

[0043] S2, adding sulfuric acid solution with a concentration of 1.0 wt% and hydrogen peroxide with a concentration o...

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Abstract

The invention discloses a method for recycling a positive electrode material of a waste nickel-cobalt-manganese ternary lithium battery, and belongs to the technical field of material recycling. The recycling method comprises the following steps: S1, carrying out leaching treatment on the positive electrode material of the waste nickel-cobalt-manganese ternary lithium battery by adopting dilute acid, and then carrying out filter pressing to obtain a leaching solution A; S2, throwing dilute acid and hydrogen peroxide into the leaching solution A for pretreatment, and obtaining a leaching solution B; S3, adjusting the pH value of the leaching solution B, removing aluminum ions through precipitation, and obtaining a leaching solution C; S4, adsorbing manganese and cobalt in the leaching solution C sequentially through chelating resin, and then obtaining adsorption effluent; carrying out dilute acid desorption on the chelating resin, and recycling manganese and cobalt after alkali liquor precipitation; S5, carrying out neutralization treatment on the adsorption effluent by adopting alkali liquor, and recycling nickel after precipitation and obtaining filtrate; and S6, reacting under a certain temperature condition, treating the filtrate by adopting a saturated crystallization method, and crystallizing to obtain lithium carbonate for recycling. The method is simple in process, low in cost and environment-friendly, and high recycling rate and high purity can be guaranteed.

Description

technical field [0001] The invention relates to a technology in the field of material recycling, in particular to a method for recycling positive electrode materials of waste nickel-cobalt-manganese ternary lithium batteries. Background technique [0002] In recent years, with the deepening of my country's energy crisis, the increasing public awareness of environmental protection, and government policy subsidies and other incentives, the new energy automobile industry has developed rapidly. With the gradual maturity of hybrid electric vehicle technology and the gradual reduction of the cost of power batteries, major companies have gathered to enter the new energy vehicle industry. Relevant data show that in 2020, China's domestic automobile power battery recycling volume will reach 257,000 tons, and it is expected to reach 422,000 tons in 2022. With the rapid development of the new energy vehicle industry, my country has become the world's largest production and sales count...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B47/00C22B23/00C22B26/12H01M10/54H01M10/0525
CPCC22B7/007C22B47/00C22B23/0415C22B23/0453C22B23/0461C22B26/12H01M10/54H01M10/0525Y02W30/84Y02P10/20Y02E60/10
Inventor 蔡建国石洪雁胡银龙
Owner JIANGSU HELPER FUNCTIONAL MATERIALS
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