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公开(公告)号：US20220109153A1
公开(公告)日：2022-04-07
申请号：US17492921
申请日：2021-10-04
发明人： Soo Ho KIM , Min Gu KANG , Min Suk KANG
IPC分类号： H01M4/525 , H01M4/505 , H01M4/131 , H01M10/0525 , C01G53/00
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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公开(公告)号：US20210384502A1
公开(公告)日：2021-12-09
申请号：US17230586
申请日：2021-04-14
发明人： Sang Han LEE , Min Gu KANG , Jeong Bae YOON , Yong Hyun CHO
IPC分类号： H01M4/525 , H01M10/0525 , H01M4/505 , H01M4/62
摘要： A lithium secondary battery includes a cathode including a cathode active material including a lithium-transition metal composite oxide particle having a crystal grain size of greater than 500 nm measured through X-ray diffraction (XRD) analysis, and an anode disposed to face the cathode. The present invention provides a lithium secondary battery having improved life-span characteristics while suppressing gas generation due to crack of the particles by controlling the crystal grain size of the lithium-transition metal composite oxide particles.
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公开(公告)号：US20230231106A1
公开(公告)日：2023-07-20
申请号：US18190136
申请日：2023-03-27
发明人： Soo Ho KIM , Min Gu KANG
IPC分类号： H01M4/131 , H01M4/1391 , H01M4/525 , H01M10/052
CPC分类号： H01M4/131 , H01M4/1391 , H01M4/525 , H01M10/052
摘要： A lithium secondary battery includes a cathode including a cathode current collector, and a first cathode active material layer and a second cathode active material layer sequentially formed on the cathode current collector, an anode, and a separation layer interposed between the cathode and the anode. The first cathode active material layer and the second cathode active material layer include a first cathode active material particle and a second cathode active material particle, respectively, which have different compositions or crystalline structures from each other, and the first cathode active material particle and the second cathode active material particle include lithium metal oxides containing nickel. The second cathode active material particle has a single particle structure.
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公开(公告)号：US20220020984A1
公开(公告)日：2022-01-20
申请号：US17377024
申请日：2021-07-15
发明人： Min Suk KANG , Min Gu KANG , Soo Ho KIM
IPC分类号： H01M4/525 , H01M4/36 , H01M10/0525
摘要： A cathode for a lithium secondary battery includes a cathode current collector, a first cathode active material layer including a first cathode active material particle, and a second cathode active material layer including a second cathode active material particle. The first cathode active material layer and the second cathode active material layer are sequentially stacked from the cathode current collector. The first cathode active material particle and the second cathode active material particle have different compositions or particle structures from each other. The first cathode active material particle and the second cathode active material particle include lithium metal oxides containing nickel. The second cathode active material particle has a single particle shape and has a particle size distribution satisfying a specific range relation.
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5.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：US20220149352A1
公开(公告)日：2022-05-12
申请号：US17582986
申请日：2022-01-24
发明人： Soo Ho KIM , Min Gu KANG , Young Hoon DO , Yong Hyun CHO
摘要： A cathode active material includes a first cathode active material particle and a second cathode active material particle. The first cathode active material particle includes a lithium metal oxide including a concentration gradient and has a secondary particle structure formed from an assembly of primary particles. The second cathode active material particle includes a lithium metal oxide having a single particle structure. The first and second cathode active material particles each includes at least two metals except from lithium, and an amount of nickel is the largest among those of the metals in each of the first and second cathode active material particles.
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公开(公告)号：US20220093905A1
公开(公告)日：2022-03-24
申请号：US17540052
申请日：2021-12-01
发明人： Min Gu KANG , Soo Ho KIM , Young Hoon DO , Yong Hyun CHO
IPC分类号： H01M4/131 , H01M4/36 , H01M4/485 , H01M4/505 , H01M4/525 , H01M4/62 , H01M4/66 , H01M10/0525 , H01M10/42 , H01M50/449
摘要： A lithium secondary battery includes a cathode formed from a cathode active material including a first cathode active material particle and a second cathode active material particle, an anode and a separation layer interposed between the cathode and the anode. The first cathode active material particle includes a lithium metal oxide in which at least one metal forms a concentration gradient. The second cathode active material particle includes primary particles having different shapes or crystalline structures from each other.
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公开(公告)号：US20200014022A1
公开(公告)日：2020-01-09
申请号：US16505087
申请日：2019-07-08
发明人： Min Gu KANG , Soo Ho KIM , Young Hoon DO , Yong Hyun CHO
IPC分类号： H01M4/131 , H01M10/0525 , H01M10/42 , H01M2/16 , H01M4/36 , H01M4/485 , H01M4/505 , H01M4/525 , H01M4/62 , H01M4/66
摘要： A lithium secondary battery includes a cathode formed from a cathode active material including a first cathode active material particle and a second cathode active material particle, an anode and a separation layer interposed between the cathode and the anode. The first cathode active material particle includes a lithium metal oxide in which at least one metal forms a concentration gradient. The second cathode active material particle includes primary particles having different shapes or crystalline structures from each other.
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公开(公告)号：US20190221829A1
公开(公告)日：2019-07-18
申请号：US16247732
申请日：2019-01-15
发明人： Soo Ho KIM , Min Gu KANG , Young Hoon DO , Yong Hyun CHO
IPC分类号： H01M4/131 , H01M10/0525 , H01M4/36 , H01M4/525 , H01M4/505
CPC分类号： H01M4/131 , H01M4/364 , H01M4/505 , H01M4/525 , H01M10/0525
摘要： A lithium secondary battery comprises a cathode, an anode, a separator and a nonaqueous electrolyte solution. The cathode includes a first cathode active material in which at least one of metals included in the first cathode material has a concentration gradient region between a central portion and a surface portion, and a second cathode active material having a single particle structure. The lithium secondary battery has improved life-span and penetration stability.
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公开(公告)号：US20220085432A1
公开(公告)日：2022-03-17
申请号：US17474684
申请日：2021-09-14
发明人： Sang Han LEE , Yong Hyun CHO , Min Gu KANG , Min Suk KANG , Yoon Ji LEE
IPC分类号： H01M10/52 , H01M4/13 , H01M4/62 , H01M10/0525
摘要： A lithium secondary battery according to an embodiment of the present invention includes an electrode assembly including a separation layer, and a plurality of cathodes and a plurality of anodes separated by the separation layer and repeatedly stacked, and a gas adsorption layer coated on a single surface of an outermost anode among the plurality of anodes.
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