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公开(公告)号：US20220285693A1
公开(公告)日：2022-09-08
申请号：US17686030
申请日：2022-03-03
申请人： SK ON CO., LTD.
发明人： Hee Gyoung KANG , Gi Hyeon MOON , So Hyun PARK , Mi Ryeong LEE , Jong Hyuk LEE , Chan Young JEON , Hae Suk HWANG
IPC分类号： H01M4/70 , H01M10/0525 , H01M4/13 , H01M10/0585
摘要： The lithium secondary battery includes a cathode which includes a cathode active material layer including a cathode current collector, a cathode tab protruding from one end thereof in a longitudinal direction of the cathode current collector, a second cathode portion disposed spaced apart from the cathode tab on the cathode current collector, and a first cathode portion disposed adjacent to the cathode tab on the cathode current collector and having an electrode density higher than that of the second cathode portion, and an anode disposed to face the cathode. Life-span characteristics of the lithium secondary battery may be improved by controlling the electrode density in the peripheral part of the cathode tab.
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公开(公告)号：US20220320502A1
公开(公告)日：2022-10-06
申请号：US17710448
申请日：2022-03-31
申请人： SK On Co., Ltd.
发明人： Jong Hyuk LEE , Hee Gyoung KANG , Mi Ryeong LEE
摘要： An electrode and a method of manufacturing the electrode are provided. The electrode includes an electrode current collector and an electrode active material layer on at least one surface of the electrode current collector. The electrode active material layer has a thickness of 200 μm or more, and when the electrode active material layer is divided into three portions of a surface layer portion, a middle layer portion, and a lower layer portion in a thickness direction, a difference in porosity between the surface layer portion and the lower layer portion by XRM analysis is 10% or less.
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公开(公告)号：US20240170669A1
公开(公告)日：2024-05-23
申请号：US18512659
申请日：2023-11-17
申请人： SK ON CO., LTD.
发明人： Eun Jin KIM , You Kyung PARK , Jung Hyun SEO , Eun Sam CHO , Jeong Tae HWANG , Mi Ryeong LEE , Yoon Ji LEE
IPC分类号： H01M4/587 , H01M4/133 , H01M10/052 , H01M10/0569
CPC分类号： H01M4/587 , H01M4/133 , H01M10/052 , H01M10/0569 , H01M2004/021
摘要： Lithium secondary batteries are disclosed. In an embodiment, a lithium secondary battery includes an anode including an anode active material that includes carbon-based active material particles including carbon, the carbon-based active material particles having a Brunauer-Emmett-Teller (BET) specific surface area of 3.0 m2/g to 5.0 m2/g and an average particle diameter (D50) of 5μm to 7.5 μm, a cathode facing the anode, and a non-aqueous electrolyte solution including a non-aqueous organic solvent that includes a propionate-based organic solvent including propionate and a lithium salt. A content of the propionate-based organic solvent relative to a total volume of the non-aqueous organic solvent is 55 vol % or more.
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公开(公告)号：US20220359864A1
公开(公告)日：2022-11-10
申请号：US17737222
申请日：2022-05-05
申请人： SK ON CO., LTD.
发明人： Mi Ryeong LEE , Hee Gyoung KANG , Gi Hyeon MOON , Jong Hyuk LEE
摘要： An anode active material for a secondary battery according to an embodiment of the present invention includes a core particle, a polymer coating formed on a surface of the core particle, and conductive particles formed on the polymer coating. The conductive particles have an average particle diameter greater than a thickness of the polymer coating. The anode active material and a secondary battery having improved stability and reduced resistance are provided using the polymer coating and the conductive particles.
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公开(公告)号：US20220285672A1
公开(公告)日：2022-09-08
申请号：US17683806
申请日：2022-03-01
申请人： SK ON CO., LTD.
发明人： Mi Ryeong LEE , Gi Hyeon MOON , Jong Hyuk LEE , Hee Gyoung KANG
摘要： An anode active material for a secondary battery according to an embodiment of the present invention includes a core particle, a polymer coating formed on a surface of the core particle, and conductive particles formed on the polymer coating. The conductive particles have an average particle diameter greater than a thickness of the polymer coating. The anode active material and a secondary battery having improved stability and reduced resistance are provided using the polymer coating and the conductive particles.
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