METHOD FOR RECOVERING ACTIVE METAL OF LITHIUM SECONDARY BATTERY

Title:

METHOD FOR RECOVERING ACTIVE METAL OF LITHIUM SECONDARY BATTERY

Document Type and Number:

WIPO Patent Application WO/2021/256732

Kind Code:

A1

Abstract:

In a method for recovering an active metal of a lithium secondary battery, a sulfuric acid solution is added to a lithium metal composite oxide so as to prepare a sulfated active material solution. A transition metal is extracted from the sulfated active material solution. A lithium precursor is recovered by adding a lithium extracting agent to the solution remaining after the transition metal has been extracted from the sulfated active material solution. Provided is a high-yield lithium precursor recovery method in which the amount of impurities is reduced and sulfuric acid and the neutralizing agent can be recycled.

Inventors:

LEE HYEON HUI (KR)
PARK JI YUN (KR)
SEO YOUNG BIN (KR)
LEE SEUNG OK (KR)
SON SUNG REAL (KR)

Application Number:

PCT/KR2021/006733

Publication Date:

December 23, 2021

Filing Date:

May 31, 2021

Export Citation:

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Assignee:

SK INNOVATION CO LTD (KR)

International Classes:

C22B3/04; B01D61/42; C01D15/02; C01G45/10; C01G51/10; C01G53/10; C22B3/00; C22B26/12; H01M10/54

Domestic Patent References:

WO2019100159A1

2019-05-31

Foreign References:

KR20190127864A	2019-11-13
KR20150063159A	2015-06-08
KR20200036625A	2020-04-07
JP2013181203A	2013-09-12
KR100709268B1	2007-04-19

Other References: