System of recovering lithium precursor and method of recovering lithium precursor

Patent metadata

Field	Value
Publication number	US-2024167181-A1
Application number	US-202318493809-A
Country	US
Kind code	A1
Filing date	Oct 25, 2023
Priority date	Nov 18, 2022
Publication date	May 23, 2024
Grant date	—

Abstract

In a method of recovering a lithium precursor, a first electrode including an active material, and a second electrode are prepared. The first electrode and the second electrode are immersed in a first reaction solution in a first reaction vessel and a second reaction solution in a second reaction vessel, respectively. A voltage or a current is applied to the first electrode and the second electrode to recover a lithium precursor from the active material.

First claim

What is claimed is:

1 . A method of recovering a lithium precursor, the method comprising:
preparing a first electrode to include an active material, and a second electrode; immersing the first electrode and the second electrode in a first reaction solution in a first reaction vessel and a second reaction solution in a second reaction vessel, respectively; and applying a voltage or a current to the first electrode and the second electrode to recover a lithium precursor from the active material.

2 . The method of claim 1 , wherein the preparing of the first electrode includes preparing the first electrode to contain the active material in an active material storing portion thereof or coating the active material on a surface thereof.

3 . The method of claim 1 , wherein the first electrode comprises an active material storing portion at one end thereof in which the active material is accommodated.

4 . The method of claim 3 , wherein the active material storing portion has a pouch shape or a basket shape.

5 . The method of claim 4 , wherein the active material storing portion is formed of a carbon felt.

6 . The method of claim 3 , wherein the first electrode comprises an electrode bar connected to the active material storing portion.

7 . The method of claim 1 , wherein the first electrode comprises an electrode bar, and the active material is directly coated on a surface of the electrode bar.

8 . The method of claim 1 , wherein the first reaction vessel serves as an oxidation unit, and the second reaction vessel serves as a reduction unit.

9 . The method of claim 8 , wherein the first reaction solution comprises a lithium ion-containing aqueous solution, and the second reaction solution includes water or a lithium ion-containing aqueous solution.

10 . The method of claim 9 , wherein the first reaction vessel and the second reaction vessel are connected to each other by a connection portion including an ion exchange membrane therein.

11 . The method of claim 10 , wherein the ion exchange membrane includes at least one made of NAFION, DIAION and TRILITE.

12 . The method of claim 1 , wherein the active material comprises lithium iron phosphate.

13 . The method of claim 12 , wherein lithium ions separated from the active material move to the second reaction vessel to be collected as lithium hydroxide.

14 . A recovery system of a lithium precursor, the recovery system comprising:
a first electrode comprising an active material; a first reaction vessel into which the first electrode is immersed; a second reaction vessel into which a second electrode is immersed; a connecting portion connecting the first reaction vessel and the second reaction vessel and including an ion exchange membrane therein; and a power source applying a voltage or a current to the first electrode and the second electrode.

15 . The recovery system of claim 14 ,
wherein the active material is in the form of a coating on the first electrode or is contained in an active material storing portion of the first electrode, and wherein the active material comprises lithium iron phosphate.

16 . The recovery system of claim 15 , wherein the first electrode comprises an electrode bar connected to the active material storing portion.

17 . The recovery system of claim 14 , wherein the first electrode serves as an oxidizing electrode and the second electrode serves as a reducing electrode.

18 . The recovery system of claim 14 , wherein the first electrode comprises an active material storing portion at one end thereof in which the active material is accommodated.

19 . The recovery system of claim 18 , wherein the active material storing portion has a pouch shape or a basket shape.

20 . The recovery system of claim 19 , wherein the active material storing portion is formed of a carbon felt.

Assignees

• Sk Innovation Co Ltd

Inventors

• Hong Suk Joon
• Bae Hyun Tae
• Kim Ji Min
• Lee Sang Ick
• Lee In Ae

Classifications

• H01M4/5825

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• H01M10/54 Primary

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• C25B11/04

  characterised by the material · CPC title

• C25B9/19

  with diaphragms · CPC title

• C25B1/01

  Products · CPC title