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1.发明公开公开(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.
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2.发明公开公开(公告)号：US20240222617A1
公开(公告)日：2024-07-04
申请号：US18516957
申请日：2023-11-22
发明人： Young Uk PARK , Min Gu KANG , Seung Hyun KIM , Jeong Hoon JEUN , Jae Young CHOI , Je Nam CHOI
摘要： A cathode active material for a lithium secondary battery includes a lithium-transition metal oxide particle having a shape of a single particle and having a Mn oxidation number ratio of 0.23 or less. The Mn oxidation number ratio is calculated from a deconvolution of a Mn2p spectrum of the lithium-transition metal oxide particle by an X-ray photoelectron spectroscopy (XPS) analysis.
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3.发明公开公开(公告)号：US20230197924A1
公开(公告)日：2023-06-22
申请号：US17994230
申请日：2022-11-25
申请人： SK ON CO., LTD.
发明人： Min Gu KANG , Sang Han Lee , Yong Hyun Cho
CPC分类号： H01M4/0435 , H01M4/505 , H01M4/525 , H01M2004/028
摘要： A cathode for a lithium secondary battery is provided. The cathode for a lithium secondary battery includes a current collector, and a first cathode active material layer formed by being pressed on at least one surface of the current collector. The first cathode active material layer includes first lithium-transition metal composite oxide particles. A pressed ratio of the current collector is 25% or less, and an electrode density is 3.4 g/cc or more.
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4.发明公开公开(公告)号：US20240222624A1
公开(公告)日：2024-07-04
申请号：US18601671
申请日：2024-03-11
申请人： SK ON CO., LTD.
发明人： Soo Ho KIM , Min Gu KANG , Min Suk KANG
CPC分类号： H01M4/525 , C01G53/50 , H01M4/131 , H01M4/505 , H01M10/0525 , C01P2002/74 , H01M2004/021
摘要： A cathode active material for a lithium secondary battery according to an embodiment of the present invention includes a lithium composite oxide particle that contains lithium and transition metals including an excess amount of nickel. The lithium composite oxide particle satisfies a predetermined XRD peak area relation. A lithium secondary battery using the cathode active material and providing improved stability and durability is provided.
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5.发明公开公开(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.
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