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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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公开(公告)号：US20240162478A1
公开(公告)日：2024-05-16
申请号：US18470423
申请日：2023-09-20
申请人： SK ON CO., LTD.
发明人： Young Uk PARK , In Haeng CHO , Seung Hyun KIM , Ki Sung PARK , Min Woo PARK , Seon Yeong PARK , Yong Hyun CHO
IPC分类号： H01M10/0525 , H01M4/505 , H01M4/525 , H01M10/0569
CPC分类号： H01M10/0525 , H01M4/505 , H01M4/525 , H01M10/0569 , H01M2300/0034
摘要： A lithium secondary battery includes a cathode including a cathode active material that contains lithium metal oxide particles, an anode facing the cathode, and a non-aqueous electrolyte solution including a non-aqueous organic solvent that contains a fluorine-based organic solvent and a lithium salt. A ratio of the number of moles of lithium contained in each of the lithium metal oxide particles to the total number of moles of metals excluding lithium contained in each of the lithium metal oxide particles is 1.05 or more. A content of the fluorine-based organic solvent is in a range from 5 vol % to 60 vol % based on a total volume of the non-aqueous organic solvent.
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4.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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