公开(公告)号：US20240113277A1

公开(公告)日：2024-04-04

申请号：US18538239

申请日：2023-12-13

Applicant: SK On Co., Ltd.

Inventor： Sang Bok Kim ,  Ji Hoon Choi ,  Jik Soo Kim ,  Mi Jung Noh ,  Dong Il Jang ,  Dong Wook Ha

IPC: H01M4/131 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525

CPC classification number: H01M4/131 ,  H01M4/0471 ,  H01M4/1391 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525

Abstract: In a method of manufacturing a cathode active material for a lithium secondary battery, a preliminary lithium metal oxide particle is prepared. The preliminary lithium metal oxide particle is cleaned using a boron compound cleaning solution. A cathode active material for a lithium secondary particle includes a lithium metal oxide particle where a ratio of a B+ peak intensity relative to a sum of peak intensities of Li+, B+ and LiB+ fragments by a TOF-SIMS analysis is in a range from 0.03% to 1.5%.

公开(公告)号：US11888102B2

公开(公告)日：2024-01-30

申请号：US17014314

申请日：2020-09-08

Applicant: SK ON CO., LTD.

Inventor： Sang Bok Kim ,  Ji Hoon Choi ,  Jik Soo Kim ,  Mi Jung Noh ,  Dong Il Jang ,  Dong Wook Ha

IPC: H01M4/36 ,  H01M4/131 ,  H01M4/1391 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/505 ,  H01M4/04

CPC classification number: H01M4/131 ,  H01M4/0471 ,  H01M4/1391 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525

Abstract: In a method of manufacturing a cathode active material for a lithium secondary battery, a preliminary lithium metal oxide particle is prepared. The preliminary lithium metal oxide particle is cleaned using a boron compound cleaning solution. A cathode active material for a lithium secondary particle includes a lithium metal oxide particle where a ratio of a B+ peak intensity relative to a sum of peak intensities of Li+, B+ and LiB+ fragments by a TOF-SIMS analysis is in a range from 0.03% to 1.5%.

公开(公告)号：US20230246181A1

公开(公告)日：2023-08-03

申请号：US18104799

申请日：2023-02-02

Applicant: SK ON CO., LTD.

Inventor： Jik Soo Kim ,  Mi Jung Noh ,  Jae Ho Choi

IPC: H01M4/505 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/525 ,  C01G53/00

CPC classification number: H01M4/505 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/525 ,  C01G53/50 ,  H01M2004/028

Abstract: A cathode active material for a lithium secondary battery according to an embodiment of the present invention includes a lithium-nickel composite metal oxide in which an oxidation number of nickel is 2.8 or more. The lithium-nickel composite metal oxide includes a first doping element having an oxidation number of +2 and a second doping element having an oxidation number of +4. A ratio of a molar ratio of the second doping element relative to a molar ratio of the first doping element is greater than 1 and less than 5.

公开(公告)号：US20220310999A1

公开(公告)日：2022-09-29

申请号：US17704201

申请日：2022-03-25

Applicant: SK ON CO., LTD.

Inventor： Sang Min Park ,  Mi Jung Noh ,  Jae Ho Choi

IPC: H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/36

Abstract: A lithium secondary battery includes a cathode including a cathode current collector and a cathode active material layer formed on the cathode current collector, the cathode active material layer including lithium-transition metal composite oxide particles, and an anode facing the cathode. A BET specific surface area after 300 cycles of the cathode active material layer is in a range from 1.5 m2/g to 2.6 m2/g, when a single cycle includes charging at 1.0 C and 4.2V in a CC/CV mode to a 100% state of charge (SOC) and then discharging at 1.0 C and 2.5V in a CC mode in a temperature range from 20° C. to 45° C.

公开(公告)号：US11978893B2

公开(公告)日：2024-05-07

申请号：US18303577

申请日：2023-04-20

Applicant: SK On Co., Ltd.

Inventor： Jik Soo Kim ,  Sang Bok Kim ,  Hyo Shin Kwak ,  Myoung Lae Kim ,  Se Rah Moon ,  Jin Seok Seo ,  Mi Jung Noh ,  Duck Chul Hwang

IPC: H01M4/36 ,  C07D277/36 ,  C07D295/14 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/62 ,  H01M4/02

CPC classification number: H01M4/366 ,  C07D277/36 ,  C07D295/14 ,  H01M4/525 ,  H01M4/628 ,  H01M10/0525 ,  H01M2004/028

Abstract: A cathode active material for a lithium secondary battery includes a lithium metal oxide particle and a thio-based compound formed on at least portion of a surface of the lithium metal oxide particle. The thio-based compound has a double bond that contains a sulfur atom. Chemical stability of the lithium metal oxide particle may be improved and surface residues may be reduced by the thio-based compound.