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1.发明公开公开(公告)号：US20230361291A1
公开(公告)日：2023-11-09
申请号：US18306241
申请日：2023-04-25
发明人： Ji Yae DO , Jeong Bae YOON , Min Suk KANG , Hee Jun KWEON , Sang Bok KIM , Yong Hyun CHO , Dong Wook HA
IPC分类号： H01M4/505 , H01M4/525 , H01M10/052 , H01M4/131 , C01G53/00
CPC分类号： H01M4/505 , H01M4/525 , H01M10/052 , 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 a lithium-transition metal oxide particle. The lithium-transition metal oxide particle has a FWHM ratio measured by an in-situ X-ray Diffraction spectroscopy (XRD) and defined by Equation 1 of 400% or less. Life-span properties of a lithium secondary battery can be improved by preventing deformation of a lattice structure and/or a crystal structure in the lithium-transition metal composite oxide particles.
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2.发明公开公开(公告)号：US20240186512A1
公开(公告)日：2024-06-06
申请号：US18523629
申请日：2023-11-29
发明人： Min Suk KANG , Hyo Shik KIL , Ji Yae DO , Min Cheol BEAK
IPC分类号： H01M4/58 , H01M4/38 , H01M10/052
CPC分类号： H01M4/5825 , H01M4/382 , H01M10/052 , H01M2004/028
摘要： Cathode active materials for lithium secondary batteries and lithium secondary batteries including the cathode active materials are disclosed. In an embodiment, a cathode active material includes a lithium iron phosphate-based particle including a surface portion and a central portion, both of which includes vanadium (V). A total weight of the vanadium contained in the lithium iron phosphate-based particle includes a first weight amount of vanadium contained in the surface portion of the lithium iron phosphate-based particle and a second weight amount of vanadium contained in the central portion of the lithium iron phosphate-based particle, and the first weight amount is greater than the second weight amount.
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3.发明公开公开(公告)号：US20240186489A1
公开(公告)日：2024-06-06
申请号：US18343747
申请日：2023-06-29
发明人： Ji Yae DO , Min Suk KANG , Min Cheol BEAK , Kwang Ho LEE , Jae Young CHOI
CPC分类号： H01M4/366 , C01B25/45 , H01M4/133 , H01M4/136 , H01M4/5825 , H01M4/587 , H01M2004/028
摘要： A cathode active material for a lithium secondary battery according to an embodiment of the present disclosures a plurality of composite particles, each of which comprises a lithium metal phosphate particle, and a carbon coating formed on at least a portion of a surface of the lithium metal phosphate particle. A standard deviation of thickness values of the carbon coating measured by an X-ray photoelectron spectroscopy (XPS) for five different composite particles of the plurality of composite particles is 15 nm or less.
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4.发明公开公开(公告)号：US20240170654A1
公开(公告)日：2024-05-23
申请号：US18459432
申请日：2023-09-01
发明人： Min Suk KANG , Ji Yae DO , Min Cheol BEAK , Jung Hyun YUN , Kwang Ho LEE , Hyun Ji LEE
IPC分类号： H01M4/36 , H01M4/58 , H01M4/583 , H01M10/052
CPC分类号： H01M4/366 , H01M4/5825 , H01M4/583 , H01M10/052 , H01M2004/028
摘要： A cathode active material for a lithium secondary battery according to an embodiment includes a plurality of a lithium metal oxide particle that include a core containing a lithium iron phosphate-based compound and being doped with at least one metal element of Ti, V and Mn; and a carbon coating formed of the core. A ratio of an intensity of a peak corresponding to PO4 relative to an intensity of a D band measured by a Raman spectroscopy analysis is in a range from 0.10 to 0.33.
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5.发明公开公开(公告)号：US20240154118A1
公开(公告)日：2024-05-09
申请号：US18501932
申请日：2023-11-03
发明人： Ji Yae DO , Min Suk KANG , Min Cheol BEAK , Kwang Ho LEE , Wan Uk CHOI
IPC分类号： H01M4/58 , C01B25/45 , H01M4/131 , H01M10/052
CPC分类号： H01M4/5825 , C01B25/45 , H01M4/131 , H01M10/052 , H01M2004/021
摘要： Cathode active materials for lithium secondary batteries and lithium secondary batteries including the cathode active materials are disclosed. In some implementations, a cathode active material for a lithium secondary battery includes a lithium metal phosphate particle having a crystallite size in a range from 150 nm to 450 nm in a direction of a crystallographic plane (020) as measured by an X-ray diffraction (XRD) analysis. In some implementations, a lithium secondary battery includes a cathode including a cathode active material layer that includes a cathode active material for a lithium secondary battery, and an anode facing the cathode. In some implementations, an electrode crystallite size ratio defined by Equation 4 is in a range from 0.5 to 0.9.
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6.发明公开公开(公告)号：US20240105938A1
公开(公告)日：2024-03-28
申请号：US18189220
申请日：2023-03-24
申请人： SK ON CO., LTD.
发明人： Min Suk KANG , Ji Yae DO , Min Cheol BEAK , Sang Wook LEE , Yong Hyun CHO
IPC分类号： H01M4/58 , H01M4/36 , H01M4/62 , H01M10/052
CPC分类号： H01M4/5825 , H01M4/364 , H01M4/625 , H01M10/052 , H01M2004/028
摘要： A cathode active material for a lithium secondary battery according to an embodiment of the present disclosure includes first lithium metal phosphate particles, each first lithium metal phosphate particle having a secondary particle shape formed by aggregation of primary particles and having an average particle diameter (D50) in a range from 5 μm to 10 μm, second lithium metal phosphate particles, each having a single particle and having an average particle diameter in a range from 1 μm to 3 μm, and third lithium metal phosphate particles, each having a single particle shape and having an average particle diameter less than 1 μm.
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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.
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