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Comprehensive recovery method for cathode materials of ternary lithium ion battery

A technology for lithium-ion batteries and positive electrode materials, applied in the field of comprehensive recovery of positive electrode materials for ternary lithium-ion batteries, can solve the problems of low Li recovery rate and achieve the effect of improving recovery rate

Inactive Publication Date: 2018-03-23
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the biological recovery technology is still immature, and some Li will enter the waste gas in the dry recovery technology; the wet recovery technology pays attention to the recovery of Ni, Co and Mn, and puts the recovery of Li at the end of the process, resulting in the recovery of Li low rate

Method used

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  • Comprehensive recovery method for cathode materials of ternary lithium ion battery

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Comparison scheme
Effect test

Embodiment 1

[0025] A comprehensive recovery method for ternary lithium-ion battery cathode materials, comprising the following steps:

[0026] S1. Add the positive electrode powder of the ternary lithium-ion battery into water for beating treatment to obtain a beating liquid. The mass ratio of solid to liquid in the beating liquid is 1:6. Then add concentrated sulfuric acid and hydrogen peroxide and stir for 1.5 hours. The stirring temperature is 70°C. The volume-to-volume ratio (mol / L) of the material to the beating liquid is 2:1, the volume-to-mass ratio (mL / g) of the hydrogen peroxide to the positive electrode powder of the ternary lithium-ion battery is 2:1, and the pickling solution A is obtained by filtration;

[0027] S2, adjust pickling solution A to be acidic, add excessive Fe powder to remove Cu impurity, then use the sender method to remove iron and aluminum impurities in the solution, and filter to obtain filtrate B;

[0028] S3. Adjust the filtrate B to be alkaline to precipi...

Embodiment 2

[0032] A comprehensive recovery method for ternary lithium-ion battery cathode materials, comprising the following steps:

[0033] S1. Add the positive electrode powder of the ternary lithium-ion battery into water for beating treatment to obtain a beating liquid. The mass ratio of solid to liquid in the beating liquid is 1:8. Then add concentrated sulfuric acid and hydrogen peroxide and stir for 2.5 hours. The stirring temperature is 80°C. The volume-to-volume ratio (mol / L) of the material to the beating liquid is 4:1, the volume-to-mass ratio (mL / g) of the hydrogen peroxide to the positive electrode powder of the ternary lithium-ion battery is 3:1, and the pickling solution A is obtained by filtration;

[0034] S2, adjust pickling solution A to be acidic, add excessive Fe powder to remove Cu impurity, then use the sender method to remove iron and aluminum impurities in the solution, and filter to obtain filtrate B;

[0035] S3. Adjust the filtrate B to be alkaline to precipi...

Embodiment 3

[0039] A comprehensive recovery method for ternary lithium-ion battery cathode materials, comprising the following steps:

[0040] S1. Add 1 kg of ternary lithium-ion battery positive electrode powder into 4 L of deionized water for beating treatment to obtain a beating liquid, then add 20 mol of concentrated sulfuric acid and 1 L of hydrogen peroxide and stir for 3 hours at a stirring temperature of 60 ° C, and filter to obtain acid dipping liquid A;

[0041] S2. Adjust the pH value of pickling solution A to 2, add excess Fe powder to remove Cu impurities, then add excess sodium chlorate and sodium carbonate, adjust the pH value to 2.5 to remove iron and aluminum impurities in the solution, and filter to obtain filtered Liquid B;

[0042] S3. Add NaOH solid to the filtrate B, adjust the pH value of the filtrate B to 10 to precipitate nickel, cobalt, and manganese elements, and filter to obtain solution C and filter residue D;

[0043] S4. Concentrate the solution C until the...

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Abstract

The invention discloses a comprehensive recovery method for cathode materials of a ternary lithium ion battery. The comprehensive recovery method comprises the following steps that the cathode materials of the ternary lithium ion battery are added into water for pulping treatment to obtain a pulping liquid, then concentrated sulfuric acid and hydrogen peroxide are added to be stirred, and filtering is conducted to obtain an acid leaching solution A; the acid leaching A is regulated to be acidic, excessive Fe powder is added to remove Cu impurity, then iron and aluminum impurities in the solution are removed by using a halotrichite method, and filtering is conducted to obtain a filtrate B; the filtrate B is regulated to be alkaline to precipitate a nickel element, a cobalt element and a manganese element, and filtering is conducted to obtain a solution C and filter residue D; the solution C is concentrated, and then a saturated sodium carbonate solution is added to obtain lithium carbonate precipitation; and the filter residue D is dissolved to obtain a solution E, and the solution E is extracted and separated to obtain a nickel-containing solution, a cobalt-containing solution anda manganese-containing solution. According to the comprehensive recovery method for the cathode materials of the ternary lithium ion battery, after the cathode materials of the ternary lithium ion battery are leached and impurities are removed, the nickel, cobalt and manganese elements are precipitated, the lithium element is separated firstly, prior recovery of lithium is achieved, and the recovery rate of the lithium element is improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery recovery, in particular to a comprehensive recovery method for anode materials of ternary lithium ion batteries. Background technique [0002] In the next few years, the supply of high-end ternary system power lithium batteries will be in short supply, and the annual demand will reach tens of thousands of tons, and now electric vehicles represented by Tesla Motors are using ternary material lithium-ion batteries technology has gradually matured. [0003] At the same time, the treatment and recycling of ternary batteries has gradually attracted everyone's attention. The waste of ternary batteries mainly includes the waste produced in the production of ternary batteries and the waste produced by the scrapping of ternary batteries. Since ternary battery waste contains lithium, cobalt, nickel, manganese and other metals, and its content is high, its recycling has high economic value and a...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B26/12C22B23/00C22B47/00H01M10/54
CPCC22B7/007C22B23/043C22B23/0476C22B26/12C22B47/00H01M10/54Y02P10/20Y02W30/84
Inventor 王德钊郑浩徐懋李道聪
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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