公开(公告)号：US20240154112A1

公开(公告)日：2024-05-09

申请号：US18492778

申请日：2023-10-24

申请人： SK ON CO., LTD.

发明人： Hong Ki KIM ,  Min Gu KANG ,  Seung Hyun KIM ,  Young Hoon DO ,  Young Uk PARK ,  Yoon Ji LEE ,  Yong Hyun CHO

IPC分类号： H01M4/525 ,  H01M4/485 ,  H01M4/505 ,  H01M10/052

CPC分类号： H01M4/525 ,  H01M4/485 ,  H01M4/505 ,  H01M10/052 ,  H01M2004/028

摘要： A cathode active material for a lithium secondary battery according to an embodiment includes lithium metal oxide particles containing lithium and nickel, and containing a small amount of cobalt or no cobalt. An average particle diameter, a modulus and a hardness of the lithium metal oxide particles are adjusted to satisfy a desired relation. A lithium secondary battery has improved high-temperature storage properties, structural stability and high power properties.

公开(公告)号：US20240170669A1

公开(公告)日：2024-05-23

申请号：US18512659

申请日：2023-11-17

申请人： SK ON CO., LTD.

发明人： Eun Jin KIM ,  You Kyung PARK ,  Jung Hyun SEO ,  Eun Sam CHO ,  Jeong Tae HWANG ,  Mi Ryeong LEE ,  Yoon Ji LEE

IPC分类号： H01M4/587 ,  H01M4/133 ,  H01M10/052 ,  H01M10/0569

CPC分类号： H01M4/587 ,  H01M4/133 ,  H01M10/052 ,  H01M10/0569 ,  H01M2004/021

摘要： Lithium secondary batteries are disclosed. In an embodiment, a lithium secondary battery includes an anode including an anode active material that includes carbon-based active material particles including carbon, the carbon-based active material particles having a Brunauer-Emmett-Teller (BET) specific surface area of 3.0 m2/g to 5.0 m2/g and an average particle diameter (D50) of 5μm to 7.5 μm, a cathode facing the anode, and a non-aqueous electrolyte solution including a non-aqueous organic solvent that includes a propionate-based organic solvent including propionate and a lithium salt. A content of the propionate-based organic solvent relative to a total volume of the non-aqueous organic solvent is 55 vol % or more.

公开(公告)号：US20240170661A1

公开(公告)日：2024-05-23

申请号：US18181549

申请日：2023-03-10

申请人： SK ON CO., LTD.

发明人： Yoon Ji LEE ,  Seung Hyun KIM ,  Hong Ki KIM ,  Min Gu KANG

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

CPC分类号： H01M4/525 ,  C01G53/50 ,  H01M4/131 ,  H01M4/505 ,  H01M10/052 ,  H01M2004/028

摘要： Embodiments of the present invention provide a cathode active material for a lithium secondary battery including lithium-transition metal composite oxide particles. The lithium-transition metal composite oxide particles have a (113) plane FWHM change rate of 75% or less, which is measured through in-situ X-ray diffraction (XRD) and defined by Equation 1. Thereby, life-span characteristics of the lithium secondary battery may be improved by preventing a lattice structure and/or a crystal structure in lithium-transition metal composite oxide particles from being deformed.

公开(公告)号：US20230317929A1

公开(公告)日：2023-10-05

申请号：US18186259

申请日：2023-03-20

申请人： SK On Co., Ltd.

发明人： Yoon Ji LEE ,  Sang Wook LEE ,  Yong Hyun CHO

IPC分类号： H01M4/36 ,  H01M4/525 ,  H01M4/505 ,  H01M4/131 ,  C01G53/00

CPC分类号： H01M4/366 ,  H01M4/525 ,  H01M4/505 ,  H01M4/131 ,  C01G53/50 ,  H01M2004/028

摘要： A cathode active material for a lithium secondary battery according to an embodiment of the present invention includes active material particles containing a lithium-nickel metal oxide, and a tungsten-containing coating formed on at least portion of the active material particles. A content of tungsten measured by an ICP (inductively coupled plasma) is in a range from 100 ppm to 5,000 ppm, and a content of carbon measured by a CS (Carbon-Sulfur) analyzer is 500 ppm or less.

公开(公告)号：US20220384792A1

公开(公告)日：2022-12-01

申请号：US17828534

申请日：2022-05-31

申请人： SK ON CO., LTD.

发明人： Yong Hyun CHO ,  Ji Yae DO ,  Yoon Ji LEE ,  Min Suk KANG

IPC分类号： H01M4/36 ,  H01M10/052 ,  H01M4/525 ,  H01M4/505 ,  C01G53/00

摘要： A cathode active material for a lithium secondary battery includes a core portion comprising a lithium metal oxide particle, and a coating layer at least partially covering a surface of the core portion and including a lithium boron composite oxide. The lithium boron composite oxide is included in an amount from 100 ppm to 1,500 ppm based on a total weight of the cathode active material. A lithium secondary battery having improved structural stability and electrical property is provided using the cathode active material.