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A method for synthesize mother liquor of ternary cathode material precursor of lithium ion battery

A technology for lithium ion batteries and positive electrode materials is applied in the field of comprehensive utilization of mother liquor in the synthesis process of precursors of ternary positive electrode materials of lithium batteries, so as to achieve the effects of being easy to return to use and reducing production time cost and raw material cost.

Active Publication Date: 2019-01-22
QINGYUAN JIAZHI NEW MATERIAL RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the existing problems, the present invention provides a method for the comprehensive utilization of mother liquor in the synthesis process of the precursor of the lithium battery ternary positive electrode material. The method is simple in process, easy to control, low in pollution, capable of continuous production, and achieves resource recycling. effect, to solve the problems raised in the above-mentioned background technology

Method used

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  • A method for synthesize mother liquor of ternary cathode material precursor of lithium ion battery

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Embodiment 1

[0019] see figure 1 A method for comprehensive utilization of mother liquor in the synthesis process of a lithium battery ternary cathode material precursor, comprising the following steps:

[0020] The first step: the ternary precursor mother liquor is passed from top to bottom into the stripping tower deamination system and the rectification tower for deamination. The deamination residence time of the mother liquor per unit volume is controlled to 1.0h, and the ammonia gas obtained by distilling ammonia from the mother liquor is recovered. After the tower absorbs, it is passed into the ammonia water storage tank and can be returned to the co-precipitation process for use;

[0021] Step 2: Add the ternary precursor mother liquor after deamination in step 1 to the reaction tank. The ternary precursor waste is nickel-cobalt-manganese hydroxide with unqualified main element ratio or physical properties in the production process, ternary precursor The amount of waste added is 0....

Embodiment 2

[0025] see figure 1 A method for comprehensive utilization of mother liquor in the synthesis process of a lithium battery ternary cathode material precursor, comprising the following steps:

[0026] The first step: the ternary precursor mother liquor is passed from top to bottom into the stripping tower deamination system and the rectification tower for deamination. The deamination residence time of the mother liquor per unit volume is controlled to 1.0h, and the ammonia gas obtained by distilling ammonia from the mother liquor is recovered. After the tower absorbs, it is passed into the ammonia water storage tank and can be returned to the co-precipitation process for use;

[0027] Step 2: Add the ternary precursor mother liquor after deamination in step 1 to the reaction tank. The ternary precursor waste is nickel-cobalt-manganese hydroxide with unqualified main element ratio or physical properties in the production process, ternary precursor The amount of waste added is 1....

Embodiment 3

[0031] see figure 1 A method for comprehensive utilization of mother liquor in the synthesis process of a lithium battery ternary cathode material precursor, comprising the following steps:

[0032] The first step: the ternary precursor mother liquor is passed from top to bottom into the stripping tower deamination system and the rectification tower for deamination. The deamination residence time of the mother liquor per unit volume is controlled to 0.5h, and the ammonia gas obtained by distilling ammonia from the mother liquor is recovered. After the tower absorbs, it is passed into the ammonia water storage tank and can be returned to the co-precipitation process for use;

[0033] Step 2: Add the ternary precursor mother liquor after deamination in step 1 to the reaction tank. The ternary precursor waste is nickel-cobalt-manganese hydroxide with unqualified main element ratio or physical properties in the production process, ternary precursor The amount of waste added is 1....

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Abstract

A method for comprehensively utilizing mother liquor dure synthesis of ternary cathode material precursor of lithium ion battery comprises that following steps of: pas mother liquor of ternary precursor from top to bottom into a rectification column of a stripper ammonia deamination system for deamination, and controlling the deamination residence time of the mother liquor per unit volume to be 0.5-1.0 mmol / L, wherein the deamination residence time of the mother liquor per unit volume of the stripper ammonia deamination system is less than 0.5 mmol / L. 1.0h; A certain amount of ternary precursor waste is added after deamination in the first step, and ozone is introduced at a certain rate, and the mixture is heated and stirred to react with 0.5-2h; Filtering the mother liquor of the ternaryprecursor after the reaction is completed in the step 2 to obtain filtrate and filter residue; 3, put that filter residue obtain in the step 3 into another reaction tank, adding water to mix slurry, adding a certain amount of sulfuric acid and reduce agent, heating and stirring to leach 2-6h. A method for synthesize a ternary cathode material precursor of a lithium ion battery by comprehensively utilizing a moth liquor, wherein that obtained precipitate is easy to filter and easy to be returned for use; Nickel cobalt manganese and ammonium ions are thoroughly removed, which lays the foundationfor the subsequent production of high-purity sodium sulfate, reduces the cost of production time and raw materials, and realizes the closed-circuit recycling of resources in wastewater.

Description

technical field [0001] The invention relates to a method for comprehensive utilization in the preparation process of lithium ion battery positive electrode materials, in particular to a method for comprehensive utilization of mother liquor in the synthesis process of lithium battery ternary positive electrode material precursors. Background technique [0002] In recent years, power lithium batteries with ternary materials as cathode materials have gradually occupied an increasingly important position in the power battery industry due to their important advantages such as high capacity, high energy density, good cycle stability, and moderate cost. At present, the industrial ternary cathode materials are generally made of the hydroxides of Ni, Co, and Mn as precursors and calcined with lithium. The mainstream process for the generation of ternary material precursors is the co-precipitation method. By configuring a solution of mixed metal ions with a certain concentration, NaOH...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36C01D5/00
CPCC01D5/00H01M4/36C01G53/006C01P2006/80H01M4/525Y02E60/10
Inventor 汤依伟吴理觉文定强陈建兵黄亚祥郑世林
Owner QINGYUAN JIAZHI NEW MATERIAL RES INST CO LTD
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