公开(公告)号：US20240396111A1

公开(公告)日：2024-11-28

申请号：US18694416

申请日：2022-09-14

Applicant: SK INNOVATION CO., LTD.

Inventor： Young Bin SEO ,  Hyeon Jung KIM ,  Ji Yun PARK ,  Sung Real SON ,  Sang Ick LEE ,  Suk Joon HONG ,  Ji Min KIM

IPC: H01M10/54 ,  C01D15/02

Abstract: In a method for recovering a lithium precursor from a lithium secondary battery, an electrode powder is prepared from a lithium secondary battery. A calcium compound is mixed with the electrode powder to prepare a cathode active material mixture. The cathode active material mixture is reductively treated to form a preliminary precursor mixture. A lithium precursor is recovered from the preliminary precursor mixture. Accordingly, the lithium precursor is obtained with high purity without a complicated leaching process and an additional process resulting from a wet-based process using an acidic solution.

公开(公告)号：US20240006678A1

公开(公告)日：2024-01-04

申请号：US18467727

申请日：2023-09-15

Applicant: SK INNOVATION CO., LTD.

Inventor： Min Ji SUNG ,  Sung Real SON ,  Suk Joon HONG ,  Ji Min KIM ,  Hyeon Jung KIM ,  Young Bin SEO

IPC: H01M10/54 ,  C22B1/24 ,  C22B5/14 ,  C22B26/12

CPC classification number: H01M10/54 ,  C22B1/24 ,  C22B5/14 ,  C22B26/12

Abstract: A method for recovering active metals of a lithium secondary battery comprises collecting a cathode active material mixture from the cathode of the lithium secondary battery; subjecting the cathode active material mixture to a reducing reaction to prepare a preliminary precursor mixture; forming an aqueous lithium precursor solution from the preliminary precursor mixture; and collecting an aluminum-containing material from the aqueous lithium precursor solution with an aluminum removing resin.

公开(公告)号：US20230369670A1

公开(公告)日：2023-11-16

申请号：US18246095

申请日：2021-08-24

Applicant: SK INNOVATION CO., LTD.

Inventor： Young Bin SEO ,  Min Ji SUNG ,  Ji Min KIM ,  Seung Ok LEE ,  In Ae LEE

IPC: H01M10/54 ,  C22B5/14 ,  C22B7/00 ,  C22B3/24 ,  C22B1/00 ,  C22B21/00 ,  C22B21/02 ,  C22B26/12 ,  B01J43/00 ,  B01J47/02 ,  B01J49/50 ,  C01D15/02 ,  C01D15/08 ,  C01F7/021

CPC classification number: H01M10/54 ,  C22B5/14 ,  C22B7/006 ,  C22B3/24 ,  C22B1/005 ,  C22B21/0007 ,  C22B21/0023 ,  C22B21/02 ,  C22B26/12 ,  B01J43/00 ,  B01J47/02 ,  B01J49/50 ,  C01D15/02 ,  C01D15/08 ,  C01F7/021

Abstract: In a method for recovering active metals of a lithium secondary battery according to an embodiment, a cathode active material mixture is collected from the cathode of the lithium secondary battery, the cathode active material mixture is reduced by a reducing reaction to prepare a preliminary precursor mixture, an aqueous lithium precursor solution is formed from the preliminary precursor mixture, and an aluminum-containing material is removed from the aqueous lithium precursor solution with an aluminum removing resin.

公开(公告)号：US20240150191A1

公开(公告)日：2024-05-09

申请号：US18549348

申请日：2022-03-03

Applicant: SK INNOVATION CO., LTD.

Inventor： Young Bin SEO ,  Ji Yun PARK ,  Sung Real SON ,  Sang Ick LEE ,  Suk Joon HONG ,  Ji Min KIM

IPC: C01D15/02 ,  C01D15/04 ,  C01D15/08 ,  H01M10/54

CPC classification number: C01D15/02 ,  C01D15/04 ,  C01D15/08 ,  H01M10/54

Abstract: In a method for recovering lithium hydroxide from a lithium secondary battery, cathode powder is prepared from a cathode of the lithium secondary battery. A cathode active material mixture is prepared by mixing the cathode powder with a calcium compound. The cathode active material mixture is reduced to form a preliminary precursor mixture. A lithium precursor is recovered from the preliminary precursor mixture. Therefore, a lithium precursor can be obtained with high purity without a complicated leaching process or an additional process, which result from a wet-based acid solution process.

公开(公告)号：US20230420762A1

公开(公告)日：2023-12-28

申请号：US18464894

申请日：2023-09-11

Applicant: SK INNOVATION CO., LTD.

Inventor： Min Ji SUNG ,  Ye Rhee CHA ,  Sung Real SON ,  Ji Min KIM ,  Young Bin SEO ,  Hyeon Bae HA

IPC: H01M10/54 ,  C01D15/02 ,  C01D15/08 ,  B01J8/18

CPC classification number: H01M10/54 ,  C01D15/02 ,  C01D15/08 ,  B01J8/1827 ,  C01P2004/61

Abstract: In a method for recycling a lithium precursor of the present invention, cathode active material powders including lithium composite oxide particles and having different particle sizes are prepared. A preliminary precursor mixture is prepared by reducing the cathode active material powders in a fluidized bed reactor including a reactor body whose cross-sectional diameter is decreased stepwise or gradually from an upper portion to a lower portion. Subsequently, a lithium precursor is recovered from the preliminary precursor mixture.

公开(公告)号：US20230250507A1

公开(公告)日：2023-08-10

申请号：US18010576

申请日：2021-05-31

Applicant: SK INNOVATION CO., LTD.

Inventor： Hyeon Hui LEE ,  Ji Yun PARK ,  Young Bin SEO ,  Seung Ok LEE ,  Sung Real SON

IPC: C22B3/08 ,  H01M10/54 ,  C22B3/00 ,  C22B47/00 ,  C22B26/12 ,  C22B3/04 ,  C01D15/02

CPC classification number: C22B3/08 ,  H01M10/54 ,  C22B23/043 ,  C22B47/00 ,  C22B26/12 ,  C22B3/045 ,  C01D15/02

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. In the method, the amount of impurities is reduced, and sulfuric acid and the neutralizing agent can be recycled so that a high-yield lithium precursor recovery is enabled.