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1.发明公开
公开(公告)号：EP4386900A1
公开(公告)日：2024-06-19
申请号：EP23191888.9
申请日：2023-08-17
发明人： KANG, Min Suk , DO, Ji Yae , BEAK, Min Cheol , YUN, Jung Hyun , LEE, Kwang Ho , LEE, Hyun Ji
CPC分类号： H01M2004/02820130101 , H01M4/366 , H01M4/525 , H01M4/5825 , H01M4/62
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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2.发明公开
公开(公告)号：EP4368570A1
公开(公告)日：2024-05-15
申请号：EP23194046.1
申请日：2023-08-29
发明人： DO, Ji Yae , KANG, Min Suk , BEAK, Min Cheol , LEE, Kwang Ho , CHOI, Wan Uk
CPC分类号： H01M4/5825 , H01M4/366 , C01B25/30
摘要： 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 (020) plane as measured by an X-ray diffraction (XRD) analysis. 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. An electrode crystallite size ratio defined by Equation 4 is in a range from 0.5 to 0.9.
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3.发明公开
公开(公告)号：EP4276074A1
公开(公告)日：2023-11-15
申请号：EP23172166.3
申请日：2023-05-08
发明人： DO, Ji Yae , YOON, Jeong Bae , KANG, Min Suk , KWEON, Hee Jun , KIM, Sang Bok , CHO, Yong Hyun , HA, Dong Wook
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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4.发明公开
公开(公告)号：EP4383364A1
公开(公告)日：2024-06-12
申请号：EP23191342.7
申请日：2023-08-14
发明人： DO, Ji Yae , KANG, Min Suk , BEAK, Min Cheol , LEE, Kwang Ho , CHOI, Jae Young
IPC分类号： H01M4/131 , H01M4/36 , H01M4/58 , H01M4/62 , H01M10/052
CPC分类号： H01M4/5825 , H01M4/366 , H01M4/625 , H01M10/052 , H01M4/131
摘要： A cathode active material for a lithium secondary battery according to an embodiment of the present disclosure 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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5.发明公开
公开(公告)号：EP4379854A1
公开(公告)日：2024-06-05
申请号：EP23213559.0
申请日：2023-11-30
发明人： KANG, Min Suk , KIL, Hyo Shik , DO, Ji Yae , BEAK, Min Cheol
IPC分类号： H01M4/136 , H01M4/58 , H01M4/36 , H01M10/052 , H01M4/02
CPC分类号： H01M4/5825 , H01M2004/02820130101 , H01M4/136 , H01M4/366 , H01M10/052
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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6.发明公开
公开(公告)号：EP4064390A1
公开(公告)日：2022-09-28
申请号：EP22156653.2
申请日：2022-02-14
申请人： SK On Co., Ltd.
发明人： KANG, Min Gu , KANG, Min Suk , KIM, Soo Ho
摘要： A cathode for a lithium secondary battery includes a cathode current collector, and a cathode active material layer comprising a first cathode active material layer and a second cathode active material layer sequentially stacked on the cathode current collector. The first cathode active material layer includes a first cathode active material particle having a secondary particle structure, and the second cathode active material layer includes a second cathode active material particle having a single particle shape. An adhesive force of the first cathode active material layer to a surface of the cathode current collector is greater than an adhesive force of the second cathode active material layer to a surface of the first cathode active material layer.
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7.发明公开
公开(公告)号：EP4343890A1
公开(公告)日：2024-03-27
申请号：EP23164547.4
申请日：2023-03-28
申请人： SK On Co., Ltd.
发明人： KANG, Min Suk , DO, Ji Yae , BEAK, Min Cheol , LEE, Sang Wook , CHO, Yong Hyun
摘要： A cathode active material for a lithium secondary battery according to an embodiment of the present invention includes first lithium metal phosphate particles having a shape of a secondary particle 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 having a shape of a single particle and having an average particle diameter in a range from 1 µm to 3 µm, and third lithium metal phosphate particles having a shape of a single particle and having an average particle diameter less than 1 µm.
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公开(公告)号：EP4108637A1
公开(公告)日：2022-12-28
申请号：EP22175252.0
申请日：2022-05-24
申请人： SK On Co., Ltd.
发明人： CHO, Yong Hyun , DO, Ji Yae , LEE, Yoon Ji , KANG, Min Suk
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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9.发明公开
公开(公告)号：EP3995455A1
公开(公告)日：2022-05-11
申请号：EP21206759.9
申请日：2021-11-05
发明人： LEE, Yoon Ji , LEE, Sang Han , KANG, Min Suk , CHO, Yong Hyun
IPC分类号： C01G53/00
摘要： The cathode active material for a lithium secondary battery includes lithium-transition metal composite oxide particles having a crystal grain size of less than 300 nm measured through XRD analysis and an XRD peak intensity ratio of 7% or more. The present invention provides a lithium secondary battery with improved life-span properties and output properties by controlling the crystal grain size and XRD peak intensity ratio of lithium-transition metal composite oxide particles.
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