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Method for recovery of lithium from used lithium ion cell with ion sieve

A lithium-ion battery, separation and recovery technology, applied in the field of lithium recovery, can solve problems such as capacity drop, scrapping, electrode expansion, etc.

Inactive Publication Date: 2003-10-29
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lithium-ion secondary batteries will be scrapped due to electrode expansion and capacity drop after a certain number of charge and discharge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Fully discharge the waste lithium-ion battery, remove the shell of the battery by physical methods, soak the battery core in 4.0mol / L excess hydrochloric acid at 70°C, and keep stirring to make Li + The ions are fully dissolved. Use 2mol / L NaOH to adjust the pH value of the solution to about 12, filter to remove precipitates and insoluble matter, and put the filtrate into a tank containing excess λ-MnO 2 In the container of ion sieve solid powder, keep stirring to make λ-MnO 2 The ion sieve is suspended, and its clear solution is used to determine the Li + The concentration of ions until Li in solution + The ion concentration is less than 1ppm. Filter and separate the system, wash the residual mother liquor on the surface of the ion sieve, then soak it in excess 1.0mol / L hydrochloric acid, stir continuously to make it in a suspended state, when the Li in the eluent + After the ion concentration does not change and reaches equilibrium, it is filtered and separated ag...

Embodiment 2

[0025] Fully discharge the waste lithium-ion battery, remove the shell of the battery by physical means, soak the remaining part in 3.0mol / L excess hydrochloric acid at 80°C, and keep stirring to make Li + The ions are fully dissolved. Use 3mol / L NaOH to adjust the pH value of the solution system to about 11, filter and separate the precipitate and insoluble matter to obtain the Li-containing + solution of ions. The filtrate was transferred to the bottom plugged with a layer of glass sand core and filled with excess λ-MnO 2 In the glass exchange column of ion sieve particles, the diameter of the glass exchange column is 1.2cm, and the capacity is 50ml. Before the filtrate is transferred, the exchange column is driven off with distilled water to remove air bubbles. Open the valve of the exchange column, and control the flow rate to 1-5ml / min for exchange and adsorption. When λ-MnO 2 After ion sieve adsorption reaches saturation, wash the residual liquid in the column with d...

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Abstract

A process for recovering Li from used Li-ion battery by ion sieve includes dissolving the Li-ion battery in acid, adsorbing the Li ions by lambda-MnO2 ion sieve, and eluting Li ions out by diluted hydrochloric acid solution. Its advantages are high recovery yield and purity, and environmentally friendly.

Description

technical field [0001] The invention relates to a method for recovering lithium from waste lithium ion batteries, in particular to a method for using ion sieves to recover lithium from waste lithium ion batteries. Background technique [0002] Since the commercial production of lithium-ion batteries in 1990, they have been widely used due to their small size, light weight, large power storage capacity, fast charging speed, wide temperature range, long working hours and long cycle life. Used in cameras, mobile phones, notebook computers, and portable measuring instruments. It is also the preferred light and high-energy power source for electric vehicles in the future. After a certain number of charging and discharging, the lithium-ion secondary battery will be scrapped due to the expansion of the electrode and the decrease in capacity. With the development of technology and economy, the use of lithium-ion batteries will continue to increase year by year, and the number of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/24H01M10/54
CPCY02W30/84
Inventor 雷家珩郭丽萍童辉陈永熙孙育斌
Owner WUHAN UNIV OF TECH
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