公开(公告)号：US20230063421A1

公开(公告)日：2023-03-02

申请号：US17887410

申请日：2022-08-12

申请人： SK ON CO., LTD.

发明人： So Hyun PARK ,  Hee Gyoung KANG ,  Chan Young JEON ,  Hae Suk HWANG

IPC分类号： H01M4/583 ,  H01M10/052 ,  H01M4/36

摘要： Secondary batteries including the anode and having improved capacity properties and stability are disclosed. In an aspect, an anode for a secondary battery includes first anode active material particles, each of the first anode active material particles having a single particle structure that includes a core particle and a coating layer formed on a surface of the core particle, and second anode active material particles including a carbon-based material, wherein each of the second anode active material particles includes an assembly of a plurality of sub-particles.

公开(公告)号：US20220328829A1

公开(公告)日：2022-10-13

申请号：US17708888

申请日：2022-03-30

申请人： SK ON CO., LTD.

发明人： So Hyun PARK ,  Chan Young JEON ,  Hee Gyoung KANG ,  Hae Suk HWANG

IPC分类号： H01M4/583 ,  H01M4/04 ,  H01M4/36 ,  H01M4/133 ,  H01M10/052

摘要： An anode for a lithium secondary battery according to exemplary embodiments may include an anode current collector and an active material layer formed on at least one surface of the anode current collector and having a value of pore resistance to density within a predetermined range. Accordingly, it is possible to secure both high-capacity characteristics and high speed charging stability, thus to further improve capacity and efficiency of the lithium secondary battery.

公开(公告)号：US20240332511A1

公开(公告)日：2024-10-03

申请号：US18738082

申请日：2024-06-10

申请人： SK ON CO., LTD.

发明人： So Hyun PARK ,  Hee Gyoung KANG ,  Hae Suk HWANG ,  Chan Young JEON

IPC分类号： H01M4/36 ,  H01M4/02 ,  H01M10/0525

CPC分类号： H01M4/366 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

摘要： An anode for a lithium secondary battery includes an anode current collector, and an anode active material layer formed on the anode current collector. The anode active material layer including a lower anode active material layer formed on the anode current collector and an upper anode active material layer formed on the lower anode active material layer. Each of the lower anode active material layer and the upper anode active material layer includes a first anode active material and a second anode active material having a hardness less than that of the first anode active material. A total intrusion amount of mercury to pores having a diameter of 3 nm to 10 μm in the anode active material layer measured by a mercury porosimeter is 0.27 ml/g or more.

公开(公告)号：US20230068138A1

公开(公告)日：2023-03-02

申请号：US17887403

申请日：2022-08-12

申请人： SK ON CO., LTD.

发明人： Chan Young JEON ,  Hee Gyoung KANG ,  So Hyun PARK ,  Hae Suk HWANG

IPC分类号： H01M4/36 ,  H01M10/052 ,  H01M4/583 ,  H01M4/485

摘要： Secondary batteries including an anode and having improved capacity properties and stability are disclosed. In an aspect, an anode for a secondary battery includes first anode active material particles, each of the first anode active material particles having a single particle structure that includes a core particle and a coating layer formed on a surface of the core particle, and second anode active material particles having an average particle diameter greater than that of the first anode active material particles. A ratio of a weight of the first anode active material particles to a total weight of the first anode active material particles and the second anode active material particles is in a range from 50 wt % to 100 wt %.

公开(公告)号：US20220344661A1

公开(公告)日：2022-10-27

申请号：US17724464

申请日：2022-04-19

申请人： SK On Co., Ltd.

发明人： Hae Suk HWANG ,  Jong Hyuk LEE ,  Hee Gyoung KANG ,  So Hyun PARK ,  Chan Young JEON

IPC分类号： H01M4/587 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0525

摘要： Provided is a negative electrode active material for a secondary battery including an active material in a bimodal form including small particles and large particles, in which the small particles are primary particles, and the large particles are secondary particles formed by granulating the primary particles.

公开(公告)号：US20220344637A1

公开(公告)日：2022-10-27

申请号：US17718251

申请日：2022-04-11

申请人： SK ON CO., LTD.

发明人： Hae Suk HWANG ,  Sang Han LEE

IPC分类号： H01M4/36 ,  H01M4/587

摘要： An anode active material for a lithium secondary battery according to an embodiment of the present invention includes a first anode active material and a second anode active material, each of which includes a carbon-based active material and has a crystallite size in a range from 50 nm to 60 nm. An XRD orientation ratio of the first anode active material is in a range from 0.9 to 1.2, and an XRD orientation ratio of the second anode active material is in a range from 1 to 5. High-temperature storage and life-span properties are improved while maintaining high capacity using the combination of the first and second anode active materials.

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.