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公开(公告)号：US20240313195A1
公开(公告)日：2024-09-19
申请号：US18405497
申请日：2024-01-05
申请人： SK On Co., Ltd.
发明人： Kwang Ho JEONG , Seung Deok SEO
CPC分类号： H01M4/364 , H01M4/133 , H01M4/136 , H01M4/483 , H01M4/587 , H01M4/622 , H01M10/0525 , H01M2004/021 , H01M2004/027
摘要： Provided is an anode for a lithium secondary battery and a lithium secondary battery including the same, the anode for a secondary battery including: an anode current collector; a first anode mixture layer disposed on at least one surface of the anode current collector, and including a first silicon-based anode active material; and a second anode mixture layer disposed on the first anode mixture layer, and including a second silicon-based anode active material, wherein the second silicon-based anode active material has a higher discharge capacity than the first silicon-based anode active material.
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公开(公告)号：US20240297299A1
公开(公告)日：2024-09-05
申请号：US18589898
申请日：2024-02-28
申请人： SK ON CO., LTD.
发明人： Yong Seok LEE , Sung Do KIM , Jeong A KIM , Joon Hyung MOON , Seung Deok SEO , Young Mo YANG , Kwang Ho JEONG , Ju Ho CHUNG
IPC分类号： H01M4/36 , H01M4/02 , H01M4/04 , H01M4/133 , H01M4/137 , H01M4/1393 , H01M4/1399 , H01M4/587 , H01M4/60 , H01M10/052
CPC分类号： H01M4/366 , H01M4/0404 , H01M4/133 , H01M4/137 , H01M4/1393 , H01M4/1399 , H01M4/587 , H01M4/602 , H01M10/052 , H01M2004/027
摘要： An anode for a lithium secondary battery includes an anode current collector, a second anode active material layer disposed on the anode current collector and including a second anode active material that includes a graphite-based active material and composite particles, and a first anode active material layer disposed between the anode current collector and the second anode active material layer and including a first anode active material that includes a graphite-based active material and does not include the composite particles. Each of the composite particles includes a carbon-based particle including pores, a silicon-containing coating layer disposed on an inside of the pores of the carbon-based particle or on a surface of the carbon-based particle, and a surface oxide layer disposed on the silicon-containing coating layer and including a silicon oxide.
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3.发明公开公开(公告)号：US20240213446A1
公开(公告)日：2024-06-27
申请号：US18528787
申请日：2023-12-05
发明人： Kwang Ho JEONG , Seung Deok SEO , Ji Sun LEE
IPC分类号： H01M4/134 , H01M4/133 , H01M4/1393 , H01M4/1395 , H01M4/36 , H01M4/48 , H01M4/583 , H01M4/62 , H01M10/052 , H01M10/42
CPC分类号： H01M4/134 , H01M4/133 , H01M4/1393 , H01M4/1395 , H01M4/364 , H01M4/366 , H01M4/483 , H01M4/583 , H01M4/622 , H01M10/052 , H01M10/4235 , H01M2004/027
摘要： An anode active material for a secondary battery includes an anode current collector, and an anode active material layer on at least one surface of the anode current collector. The anode active material layer includes an anode active material and an anode binder. The anode active material includes a composite particle that 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. An F-density defined by Equation 1 is 23% or less.
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4.发明公开公开(公告)号：US20240213444A1
公开(公告)日：2024-06-27
申请号：US18465160
申请日：2023-09-12
发明人： Kwang Ho JEONG , Seung Deok SEO , Jae Young CHOI , Sung Do KIM , Jeong A KIM , Do Ae YU , Yong Seok LEE
IPC分类号： H01M4/134 , H01M4/04 , H01M4/133 , H01M4/1393 , H01M4/1395 , H01M4/36 , H01M4/38 , H01M4/587 , H01M4/62 , H01M10/42
CPC分类号： H01M4/134 , H01M4/0404 , H01M4/133 , H01M4/1393 , H01M4/1395 , H01M4/364 , H01M4/366 , H01M4/386 , H01M4/587 , H01M4/622 , H01M4/625 , H01M10/4235 , H01M2004/027
摘要： An anode for a lithium secondary battery includes an anode current collector, and an anode active material layer formed on at least one surface of the anode current collector. 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 the composite particles include 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 of the composite particles, 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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