公开(公告)号：US20230207778A1

公开(公告)日：2023-06-29

申请号：US18093215

申请日：2023-01-04

Applicant: SK On Co., Ltd.

Inventor： Sang Min Park ,  Tae Kyoung Lee ,  Sang Bok Kim ,  Jik Soo Kim ,  Sang Hye Shin ,  Yu Na Shim ,  Jeong Bae Yoon

IPC: H01M4/131 ,  H01M4/04 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/1393 ,  H01M4/525 ,  H01M10/0525

CPC classification number: H01M4/131 ,  H01M4/0471 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/1393 ,  H01M4/525 ,  H01M10/0525

Abstract: The cathode active material for a lithium secondary battery according to embodiments of the present invention includes lithium-transition metal composite oxide particles including a plurality of primary particles, and the lithium-transition metal composite oxide particles have a lithium-potassium-containing portion formed between the primary particles. Thereby, it is possible to improve life-span properties and capacity properties by preventing the layer structure deformation of the primary particles and removing residual lithium.

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：US12107256B2

公开(公告)日：2024-10-01

申请号：US18093215

申请日：2023-01-04

Applicant: SK ON CO., LTD.

Inventor： Sang Min Park ,  Tae Kyoung Lee ,  Sang Bok Kim ,  Jik Soo Kim ,  Sang Hye Shin ,  Yu Na Shim ,  Jeong Bae Yoon

IPC: H01M4/131 ,  H01M4/04 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/1393 ,  H01M4/525 ,  H01M10/0525

CPC classification number: H01M4/131 ,  H01M4/0471 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/1393 ,  H01M4/525 ,  H01M10/0525

Abstract: The cathode active material for a lithium secondary battery according to embodiments of the present invention includes lithium-transition metal composite oxide particles including a plurality of primary particles, and the lithium-transition metal composite oxide particles have a lithium-potassium-containing portion formed between the primary particles. Thereby, it is possible to improve life-span properties and capacity properties by preventing the layer structure deformation of the primary particles and removing residual lithium.

公开(公告)号：US20230238527A1

公开(公告)日：2023-07-27

申请号：US18099498

申请日：2023-01-20

Applicant: SK Innovation Co., Ltd. ,  SK ON CO., LTD.

Inventor： Hee Jun Kweon ,  Sang Bok Kim ,  Sang Min Park ,  Sang Hye Shin ,  Tae Kyoung Lee ,  Ji Hoon Choi

IPC: H01M4/525 ,  H01M4/505

CPC classification number: H01M4/525 ,  H01M4/505 ,  H01M2004/028

Abstract: A cathode active material for a lithium secondary battery according to an embodiment of the present invention includes a lithium metal oxide particle that contains tungsten and has a secondary shape in which a plurality of primary particles are aggregated. The lithium metal oxide particle includes a sulfur-containing portion formed between the primary particles in an inner region of the lithium metal oxide particle.