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1.发明公开
公开(公告)号：EP4397627A1
公开(公告)日：2024-07-10
申请号：EP23220233.3
申请日：2023-12-27
发明人： PARK, Young Uk , KANG, Min Gu , KIM, Seung Hyun , JEUN, Jeong Hoon , CHOI, Jae Young , CHOI, Je Nam
CPC分类号： C01P2002/5420130101 , H01M4/505 , C01G53/006 , C01G53/50 , C01P2004/8020130101 , H01M4/525 , H01M10/052
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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2.发明公开
公开(公告)号：EP4407703A1
公开(公告)日：2024-07-31
申请号：EP23198160.6
申请日：2023-09-19
发明人： JEONG, Kwang Ho , SEO, Seung Deok , CHOI, Jae Young , KIM, Sung Do , KIM, Jeong A , YU, Do Ae , LEE, Yong Seok
IPC分类号： H01M4/04 , H01M4/13 , H01M4/134 , H01M4/136 , H01M4/139 , H01M4/1395 , H01M4/1397 , H01M4/36 , H01M4/38 , H01M4/48 , H01M4/58 , H01M4/62
CPC分类号： Y02E60/10 , H01M2004/02720130101 , H01M4/0404 , H01M4/139 , H01M4/1395 , H01M4/1397 , H01M4/13 , H01M4/134 , H01M4/136 , H01M4/366 , H01M4/483 , H01M4/58 , H01M4/386 , H01M4/622
摘要： An anode (130) for a lithium secondary battery includes an anode current collector (125), and an anode active material layer formed on at least one surface of the anode current collector (125). The anode active material layer includes an anode active material and an anode binder. The anode active material includes a plurality of composite particles, each of which includes a silicon-based active material particle, and a solid electrolyte interphase (SEI) layer formed on at least a portion of a surface of the silicon-based active material particle. A relative standard deviation of thickness values of the SEI layer which are measured by an X-ray photoelectron spectroscopy (XPS) from 9 different composite particles among the plurality of composite particles after repeating 100 cycles of charging and discharging is 20% or less.
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3.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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4.发明公开
公开(公告)号：EP4431455A1
公开(公告)日：2024-09-18
申请号：EP23214233.1
申请日：2023-12-05
发明人： CHUNG, Ju Ho , PARK, Gwi Ok , CHOI, Jae Young
IPC分类号： C01B33/113 , H01M4/13 , H01M4/36 , H01M4/48 , H01M4/587
CPC分类号： Y02E60/10 , C01B33/113 , C01P2002/5220130101 , C01P2004/8020130101 , H01M4/48 , H01M4/366 , H01M4/362 , H01M4/587 , H01M4/13 , H01M10/052 , H01M2004/02720130101 , H01M4/133 , H01M4/483 , H01M10/0525 , H01M4/625 , H01M4/485 , C01B33/12
摘要： An anode active material for a secondary battery according to an embodiment of the present invention includes a silicon oxide particle. The silicon oxide particle has a core portion and a surface portion on the core portion, and an oxidation number ratio defined as OS/OC of the silicon oxide particle is 1.7 or more, and less than 2.2. OS is an oxidation number of silicon oxide at the surface portion obtained by an X-ray photoelectron spectroscopy (XPS) analysis, and OC is an oxidation number of silicon oxide at the core portion obtained by the XPS analysis.
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5.发明公开
公开(公告)号：EP4300613A1
公开(公告)日：2024-01-03
申请号：EP23170512.0
申请日：2023-04-27
发明人： YANG, Young Mo , MOON, Joon Hyung , YU, Do Ae , CHUNG, Ju Ho , CHOI, Jae Young
IPC分类号： H01M4/04 , H01M4/133 , H01M4/134 , H01M4/1393 , H01M4/1395 , H01M4/36
摘要： An anode active material for a secondary battery according to an embodiment of the present invention includes a plurality of a composite particle. The composite particle includes a carbon-based particle containing pores therein, a silicon-containing coating layer formed at an inside of the pores and/or on a surface of the carbon-based particle, and a surface oxide layer formed on the silicon-containing coating layer. The surface oxide layer contains silicon oxide. A silicon oxidation number ratio defined by Equation 1 of the composite particle is 0.6 or less.
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6.发明公开
公开(公告)号：EP4170751A1
公开(公告)日：2023-04-26
申请号：EP22202624.7
申请日：2022-10-19
发明人： KIM, Sang Bok , PARK, Sang Min , CHOI, Ji Hoon , SUNG, Jung Moon , SHIN, Sang Hye , LEE, Ji Sun , CHOI, Jae Young
IPC分类号： H01M4/36 , H01M4/46 , H01M4/485 , H01M4/505 , H01M4/525 , H01M4/62 , H01M10/0525 , H01M50/105 , H01M4/02
摘要： Embodiments of the present invention provide a cathode active material for a lithium secondary battery. The cathode active material for a lithium secondary battery includes lithium-transition metal composite oxide particles, and a coating formed on each of the lithium-transition metal composite oxide particles. The coating includes a lithium-sulfur compound and a metal hydroxide. A residual lithium on a surface of the cathode active material is sufficiently removed to improve an ionic conductivity and low-resistance.
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