公开(公告)号：US20240213444A1

公开(公告)日：2024-06-27

申请号：US18465160

申请日：2023-09-12

申请人： SK INNOVATION CO., LTD. ,  SK ON CO., LTD.

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.

公开(公告)号：US20230223548A1

公开(公告)日：2023-07-13

申请号：US18154617

申请日：2023-01-13

申请人： SK ON CO., LTD.

发明人： Jae Kyu JIN ,  Jeong A KIM ,  Sung Do KIM

IPC分类号： H01M4/66

CPC分类号： H01M4/661 ,  H01M2004/021

摘要： According to an exemplary embodiment, there is provided a secondary battery in which a value of K1 represented by the following Expression (1) is 130 to 270:


(200*AR+CR+20*CIR)*(1+CA)/CP  (1)



in Expression (1), AR is a bulk resistance (Ω·cm) of the anode, CR is a bulk resistance (Ω·cm) of the cathode, CIR is an interfacial resistance (Ω·cm2) between the cathode active material layer and the cathode current collector, CP is 1−D/4.7, D is a pressed density (g/cc) of the cathode, and CA is an adhesive force (N/18 mm) between the cathode active material layer and the cathode current collector.

公开(公告)号：US20230163277A1

公开(公告)日：2023-05-25

申请号：US17991355

申请日：2022-11-21

申请人： SK ON CO., LTD.

发明人： Kwang Ho JEONG ,  Sung Do KIM ,  Jong Hwi LIM

IPC分类号： H01M4/36 ,  H01M4/48 ,  H01M4/587 ,  H01M4/134 ,  H01M4/133 ,  H01M4/62

CPC分类号： H01M4/366 ,  H01M4/483 ,  H01M4/587 ,  H01M4/364 ,  H01M4/134 ,  H01M4/133 ,  H01M4/622 ,  H01M2004/027

摘要： An anode for a lithium secondary battery includes an anode current collector, and an anode active material layer including a first anode active material layer and a second anode active material layer sequentially disposed on a surface of the anode current collector. Each of the first anode active material layer and the second anode active material layer includes a silicon-based active material. A ratio of a content of the silicon-based active material in the second anode active material layer relative to a content of the silicon-based active material in the first anode active material layer among a total content of the silicon-based active material included in the anode active material layer is 1.25 or more, and less than 5.

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.

公开(公告)号：US20230231101A1

公开(公告)日：2023-07-20

申请号：US18156192

申请日：2023-01-18

申请人： SK ON CO., LTD.

发明人： Kwang Ho JEONG ,  Sung Do KIM ,  Jae Kyu JIN

IPC分类号： H01M4/04 ,  H01M4/38 ,  H01M4/62 ,  H01M4/36 ,  H01M10/052

CPC分类号： H01M4/0416 ,  H01M4/0435 ,  H01M4/386 ,  H01M4/622 ,  H01M4/364 ,  H01M10/052 ,  H01M4/0404 ,  H01M2004/021

摘要： A method of manufacturing a negative electrode includes styrene butadiene rubber on at least one surface of a negative electrode current collector, applying a second slurry including a negative electrode active material and a polyacrylic acid-based binder onto the first slurry, and drying and rolling the negative electrode current collector to which the first slurry and the second slurry are applied. The negative electrode active material includes a silicon-based negative electrode active material. According to the present disclosure, expansion and contraction of a silicon-based negative electrode active material during charging and discharging may be alleviated, and electrode flexibility may be improved, resulting in a significant improvement in lifespan properties of a secondary battery.

公开(公告)号：US20230163283A1

公开(公告)日：2023-05-25

申请号：US17989995

申请日：2022-11-18

申请人： SK ON CO., LTD.

发明人： Kwang Ho JEONG ,  Sung Do KIM

IPC分类号： H01M4/38 ,  H01M4/04 ,  H01M4/62 ,  H01M10/052 ,  H01M4/583 ,  H01M4/48

CPC分类号： H01M4/386 ,  H01M4/0404 ,  H01M4/622 ,  H01M10/052 ,  H01M4/583 ,  H01M4/48

摘要： An anode for a lithium secondary battery according to an embodiment of the present invention includes an anode current collector, a primer layer formed on a surface of the anode current collector, and an anode active material layer including a first anode active material layer and a second anode active material layer sequentially disposed on the primer layer. Each of the first anode active material layer and the second anode active material layer includes a silicon-based active material. A ratio of a content of the silicon-based active material in the second anode active material layer relative to a content of the silicon-based active material in the first anode active material layer among a total content of the silicon-based active material included in the anode active material layer is greater than 1.25 and less than 5.

公开(公告)号：US20230125607A1

公开(公告)日：2023-04-27

申请号：US17971446

申请日：2022-10-21

申请人： SK ON CO., LTD.

发明人： Sung Do KIM ,  Kwang Ho JEONG

IPC分类号： H01M4/62 ,  H01M4/04 ,  H01M4/583 ,  H01M4/38 ,  H01M50/46 ,  H01M10/0525

摘要： A negative electrode includes a negative electrode current collector and a negative electrode mixture layer provided on at least one surface of the negative electrode current collector. The negative electrode mixture layer includes a negative electrode active material, a binder, and an additive containing a conductive polymer and a template compound. The conductive polymer included in the negative electrode may lower resistance of the electrode by providing an electron movement path for the negative electrode active material and the conductive material of the negative electrode. Stable electrical conductivity may be maintained while significantly reducing the content of conductive materials such as carbon black and carbon nanotubes, thereby improving lifespan characteristics of the secondary battery.