公开(公告)号：US20240282951A1

公开(公告)日：2024-08-22

申请号：US18427836

申请日：2024-01-31

Applicant: SK ON CO., LTD. ,  SK INNOVATION CO., LTD.

Inventor： Yeong Bin YOO ,  Sung Soon PARK ,  Jong Hwa KIM ,  Kyung Bin YOO ,  Ju Wook LEE

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/02 ,  H01M4/131 ,  H01M4/505 ,  H01M10/052

CPC classification number: H01M4/525 ,  C01G53/006 ,  C01G53/50 ,  H01M4/131 ,  H01M4/505 ,  H01M10/052 ,  C01P2002/52 ,  C01P2004/50 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/40 ,  H01M2004/021 ,  H01M2004/028

Abstract: A cathode active material precursor for a lithium secondary battery includes nickel and at least one metal except for nickel. The cathode active material precursor includes primary particles having a major axis length of 500 nm or less and an aspect ratio in a range from 1.0 to 3.0. A volume ratio of micropores having a pore diameter of 2 nm or less relative to a total pore volume is 1.4% or less.

公开(公告)号：US20240194860A1

公开(公告)日：2024-06-13

申请号：US18510647

申请日：2023-11-16

Applicant: SK INNOVATION CO., LTD. ,  SK ON CO., LTD.

Inventor： Yeong Bin YOO ,  Sung Soon PARK ,  Keum Jung YOON ,  Jong Hwa KIM ,  Dong Il JANG

IPC: H01M4/36 ,  C01G53/00 ,  H01M4/38 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M10/052

CPC classification number: H01M4/366 ,  C01G53/50 ,  H01M4/38 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/052 ,  H01M2004/028

Abstract: A cathode active material for a lithium secondary battery includes a lithium-transition metal oxide particle containing phosphorus introduced into the particle, and a coating formed on at least a portion of a surface of the lithium-transition metal oxide particle. The coating includes a phosphorus-containing compound. A content of phosphorus introduced into the lithium-transition metal oxide particle is in a range from 15 wt % to 30 wt % based on a sum of a weight of phosphorus introduced into the lithium-transition metal oxide particle and a weight of phosphorus contained in the coating.

公开(公告)号：US20250054954A1

公开(公告)日：2025-02-13

申请号：US18789706

申请日：2024-07-31

Applicant: SK ON CO., LTD.

Inventor： Sung Soon PARK ,  Jong Hwa KIM ,  Yeong Bin YOO ,  Sang Bok KIM

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525

Abstract: A cathode active material for a lithium secondary battery includes a coating element and lithium-nickel metal oxide particles. A coating area defined as (AC/ANi)*100 1 is 25% or more. AC is an area of a region where a content of the coating element is 1.6 wt % or more based on a total weight of the lithium-nickel metal oxide particles in a quantitative map (Q-map) image obtained through a scanning electron microscope-energy dispersive X-ray spectroscopy (SEM-EDS), and ANi is an area of a region where nickel is present in the Q-map image obtained through the SEM-EDS.

公开(公告)号：US20240204185A1

公开(公告)日：2024-06-20

申请号：US18444154

申请日：2024-02-16

Applicant: SK On Co., Ltd.

Inventor： Yeong Bin YOO ,  Hee Jun KWEON ,  Tae Kyoung LEE ,  Ji Hoon CHOI ,  Kook Hyun HAN

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

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

Abstract: The cathode active material according to exemplary embodiments includes lithium metal oxide particle including a layered crystal structure and a cubic crystal structure, wherein the lithium metal oxide particle contains 80 mol % or more of nickel based on a total number of moles of all elements except for lithium and oxygen, and the lithium metal oxide particle includes the cubic crystal structure only in a region having a thickness of less than 200 nm from a surface thereof when analyzing a crystal structure thereof by a high-resolution transmission electron microscopy.

公开(公告)号：US20240170665A1

公开(公告)日：2024-05-23

申请号：US18485313

申请日：2023-10-12

Applicant: SK ON CO., LTD. ,  SK INNOVATION CO., LTD.

Inventor： Jong Hwa KIM ,  In Haeng CHO ,  Yeong Bin YOO ,  Ju Wook LEE ,  Wan Uk CHOI

IPC: H01M4/525 ,  H01M4/505 ,  H01M10/052 ,  H01M10/0569

CPC classification number: H01M4/525 ,  H01M4/505 ,  H01M10/052 ,  H01M10/0569 ,  H01M2004/028

Abstract: A lithium secondary battery includes a cathode including a cathode active material layer that includes a plurality of lithium metal oxide particles, each lithium metal oxide particle having a form of a secondary particle including a plurality of aggregated primary particles, an anode facing the cathode, and an electrolyte solution containing a lithium salt and an organic solvent. The organic solvent includes a compound represented by a specific chemical formula. The plurality of primary particles include rod-shape particles having an aspect ratio of 1.5 to 5. The rod-shape particles have a major axis oriented in a direction from a center of the lithium metal oxide particle to a surface of the lithium metal oxide particle.