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Method for recycling lithium from waste lithium ion battery

A lithium-ion battery and lithium recovery technology, applied in the field of lithium recovery, can solve the problems of complex steps, large environmental pollution, high cost, etc., and achieve the effect of promoting recycling

Pending Publication Date: 2022-07-08
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods often have problems such as complicated steps, large environmental pollution, and high cost.

Method used

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  • Method for recycling lithium from waste lithium ion battery

Examples

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Effect test

Embodiment 1

[0039] A method for recovering lithium from waste lithium-ion batteries, comprising the steps of:

[0040] (1) Charge the recovered waste lithium iron phosphate lithium-ion battery at a current density of 1C until it is fully charged.

[0041] (2) Disassemble the waste lithium iron phosphate lithium-ion battery in a fully charged state to obtain a positive electrode sheet after delithiation, a lithiated graphite negative electrode sheet, a separator, and the like.

[0042] (3) The lithiated graphite negative electrode sheet obtained above was soaked in deionized water at 25° C. for 1 hour.

[0043] (4) filter after soaking to obtain an aqueous solution of lithium hydroxide.

[0044] (5) adding the obtained lithium hydroxide aqueous solution to an impurity remover to remove impurities, and after removing impurities, heating and concentrating to remove water at 98° C. to obtain lithium hydroxide solid powder.

[0045] (6) According to the ratio of the lithium content of the fi...

Embodiment 2

[0047] A method for recovering lithium from waste lithium-ion batteries, comprising the steps of:

[0048] (1) Charge the recovered waste nickel-cobalt-manganese ternary lithium-ion battery at a current density of 1C until it is fully charged.

[0049] (2) Disassemble the waste nickel-cobalt-manganese ternary lithium-ion battery in a fully charged state to obtain a positive electrode sheet, a lithiated graphite negative electrode sheet, a separator and the like after delithiation.

[0050] (3) The lithiated graphite negative electrode sheet obtained above was soaked in deionized water at 25° C. for 1 hour.

[0051] (4) filter after soaking to obtain an aqueous solution of lithium hydroxide.

[0052] (5) adding the obtained lithium hydroxide aqueous solution to an impurity removing agent to remove impurities, and after removing impurities, heating and concentrating to remove water at 98° C. to obtain lithium hydroxide solid powder.

[0053] (6) According to the ratio of the l...

Embodiment 3

[0055] A method for recovering lithium from waste lithium-ion batteries, comprising the steps of:

[0056] (1) Charge the recovered waste lithium cobalt oxide lithium-ion battery at a current density of 1C until it is fully charged.

[0057] (2) Disassemble the waste lithium cobalt oxide lithium ion battery in a fully charged state to obtain a positive electrode sheet after delithiation, a lithiated graphite negative electrode sheet, a separator, and the like.

[0058] (3) The lithiated graphite negative electrode sheet obtained above was soaked in deionized water at 25° C. for 1 hour.

[0059] (4) filter after soaking to obtain an aqueous solution of lithium hydroxide.

[0060] (5) adding the obtained lithium hydroxide aqueous solution to an impurity removing agent to remove impurities, and after removing impurities, heating and concentrating to remove water at 98° C. to obtain lithium hydroxide solid powder.

[0061] (6) According to the ratio of the lithium content of the...

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Abstract

The invention relates to a method for recovering lithium from a waste lithium ion battery, in particular to a method for extracting lithium from water by transferring a lithium element from a positive electrode to a graphite negative electrode by adopting an electrochemical method and then transferring the lithium element into the water by utilizing the reaction activity of the lithium on the graphite negative electrode through a simple soaking process. According to the method provided by the invention, high-energy-consumption and high-pollution processes such as acid-base leaching and calcination in a traditional process are avoided, and lithium is successfully recycled. The green and environment-friendly process provided by the invention can promote the recycling of the waste batteries, and has a huge promotion effect on the sustainable and healthy development of circular economy, green economy and new energy industry.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and particularly relates to a method for recovering lithium from waste lithium ion batteries. Background technique [0002] The disclosure of information in this Background section is only for enhancement of understanding of the general background of the invention and should not necessarily be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art. [0003] After more than 30 years of development, lithium-ion batteries have been widely used in electric vehicles, electronic products, smart grids, mobile energy storage equipment and other fields, greatly enriching people's lives. However, the scarcity and uneven distribution of global lithium resources limit the wide application of lithium-ion batteries around the world to a certain extent. Recycling the lithium source in spent lithium-ion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54
CPCH01M10/54Y02W30/84
Inventor 冯金奎魏传亮
Owner SHANDONG UNIV
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