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公开(公告)号：US20230327099A1
公开(公告)日：2023-10-12
申请号：US18299643
申请日：2023-04-12
发明人： Young Hoon DO , Byoung Beom LIM , Jeong Hoon JEUN , Yong Hyun CHO
IPC分类号： H01M4/505 , H01M4/131 , H01M10/058 , H01M4/525 , H01M10/44
CPC分类号： H01M4/505 , H01M4/131 , H01M10/058 , H01M4/525 , H01M10/446 , H01M2004/021
摘要： A cathode for a lithium secondary battery according to an embodiment of the present invention includes a cathode current collector, and a cathode active material layer on the cathode current collector. The cathode active material layer includes cathode active material particles. The cathode active material particles include first lithium metal oxide particles having a shape of a secondary particle in which a plurality of primary particles are aggregated, and second lithium metal oxide particles having a shape of a single particle. A closed pore ratio of the cathode active material layer is 5% or less.
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公开(公告)号：US20230231113A1
公开(公告)日：2023-07-20
申请号：US18093815
申请日：2023-01-06
发明人： Ji Hoon CHOI , Hee Jun KWEON , Sang Bok KIM , Sang Min PARK , Ji Sun LEE , Jeong Hoon JEUN , Je Nam CHOI
IPC分类号： H01M4/36 , H01M10/052 , H01M4/525 , H01M4/505
CPC分类号： H01M4/366 , H01M10/052 , H01M4/525 , H01M4/505 , H01M2004/028
摘要： A cathode active material precursor for a lithium secondary battery is provided according to embodiments of the present invention. The cathode active material precursor for a lithium secondary battery includes a core including a first transition metal composite hydroxide, and a shell which is formed on the core and includes a second transition metal composite hydroxide in which the first transition metal composite hydroxide is doped with a doping metal including at least one of Group 4 to Group 12 metals, wherein the cathode active material precursor has a particle size distribution degree of 0.8 to 1.6 defined by Equation 1. Thereby, it is possible to suppress capacity degradation of the secondary battery due to doping while improving the structural stability of the cathode active material precursor.
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3.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：US20230207793A1
公开(公告)日：2023-06-29
申请号：US18077522
申请日：2022-12-08
发明人： Ju Ho CHUNG , Jeong Hoon JEUN , Gwi Ok PARK , Eun Jun PARK , Dong Wook HA
摘要： Provided is a negative electrode for a secondary battery satisfying the following Relation 1: [Relation 1] (V1−V2)/V1*100≥45% wherein V1 is a volume fraction (vol %) of silicon-based active material particles having a gray scale value of 30,000 or more in an XRM measurement on a negative electrode in a fully discharged state after formation, and V2 is a volume fraction (vol %) of silicon-based active material particles having a gray scale value of 30,000 or more in an XRM measurement on a negative electrode in a fully charged state after 500 cycles of charging and discharging.
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5.发明公开公开(公告)号：US20240154110A1
公开(公告)日：2024-05-09
申请号：US18457074
申请日：2023-08-28
发明人： Yong Seok LEE , Jeong Hoon JEUN , Jae Ram KIM , Jae Yun MIN , Ki Joo EOM , Myung Ro LEE , Hyun Joong JANG , Je Nam CHOI
IPC分类号： H01M4/525 , H01M4/62 , H01M10/052
CPC分类号： H01M4/525 , H01M4/625 , H01M4/626 , H01M10/052 , H01M2004/028
摘要： Cathodes and lithium secondary batteries including the cathodes are disclosed. In some implementations, a cathode may include a cathode current collector and a cathode active material layer disposed on the cathode current collector and including cathode active material particles such that the cathode active material layer satisfies a specific equation. The cathode active material particles may include lithium metal oxide particles that include nickel, and may have a mole fraction of cobalt of 0.02 or less with respect to all elements except for lithium and oxygen.
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6.发明公开公开(公告)号：US20240097125A1
公开(公告)日：2024-03-21
申请号：US18349955
申请日：2023-07-11
发明人： Yong Seok LEE , Jeong Hoon JEUN , Jae Ram KIM , Jae Yun MIN , Ki Joo EOM , Myung Ro LEE , Hyun Joong JANG , Je Nam CHOI
CPC分类号： H01M4/525 , H01M4/131 , H01M4/505 , H01M2004/021
摘要： A cathode for a lithium secondary battery includes a cathode current collector, and a cathode active material layer formed on the cathode current collector. The cathode active material layer includes cathode active material particles. The cathode active material particles include a lithium metal oxide particle containing nickel and having a mole fraction of cobalt of 0.02 or less among all elements except lithium and oxygen.
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