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1.发明申请公开(公告)号：US20230110233A1
公开(公告)日：2023-04-13
申请号：US17856447
申请日：2022-07-01
发明人： Gwi Ok PARK , Seok Keun Yoo , Dong Il Jang , Ju Ho Chung
IPC分类号： H01M4/36 , H01M4/38 , H01M4/587 , H01M10/0525 , H01M4/04
摘要： An anode active material for a lithium secondary battery includes a carbon-based particle including pores therein, a silicon-containing coating layer formed at an inside the pores of the carbon-based particle or on a surface of the carbon-based particle, and a carbon coating layer formed on the silicon-containing coating layer. A full width at half maximum (FWHM) of an O1s peak of a surface measured by an X-ray photoelectron spectroscopy (XPS) is 2.0 or more. A lithium secondary battery including the anode active material having improved initial discharge capacity and capacity efficiency is provided.
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2.发明公开公开(公告)号：US20240234701A1
公开(公告)日：2024-07-11
申请号：US18403374
申请日：2024-01-03
发明人： Ju Ho CHUNG , Gwi Ok PARK , Jae Young CHOI
CPC分类号： H01M4/366 , C01B33/12 , H01M4/133 , H01M4/48 , H01M4/587 , H01M10/052 , C01P2002/52 , C01P2002/85 , C01P2004/80 , C01P2006/40 , H01M2004/027
摘要： Anode active materials and secondary batteries including the anode active materials are disclosed. An anode active material for a secondary battery based on an embodiment of the present disclosure includes a silicon oxide particle. The silicon oxide particle has a core portion including silicon oxide and a surface portion formed on the core portion. 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 of the surface portion obtained by an X-ray photoelectron spectroscopy (XPS) analysis, and OC is an oxidation number of the silicon oxide of the core portion obtained by the XPS analysis.
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公开(公告)号：US20240128443A1
公开(公告)日：2024-04-18
申请号：US18471302
申请日：2023-09-21
发明人： Hee Soo KIM , Yeon Ho KIM , Young Kwang KIM , Young Eun CHEON , Gwi Ok PARK , Seok Keun YOO
CPC分类号： H01M4/366 , C01B32/05 , H01M4/386 , H01M4/587 , C01P2004/80 , C01P2006/40 , H01M2004/021
摘要： A silicon-carbon containing electrode material includes a porous carbon structure including pores, and a silicon-containing coating formed on the porous carbon structure. A volume ratio of mesopores is 70% or more based on a total pore volume of the porous carbon structure. A weight ratio of silicon is 30 wt % or more based on a total weight of the electrode material. A high-capacity secondary battery is effectively implemented by using silicon-carbon containing electrode material.
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公开(公告)号：US20230207793A1
公开(公告)日：2023-06-29
申请号：US18077522
申请日：2022-12-08
发明人： Ju Ho CHUNG , Jeong Hoon JEUN , Gwi Ok PARK , Eun Jun PARK , Dong Wook HA
摘要： Provided is a negative electrode for a secondary battery satisfying the following Relation 1: [Relation 1] (V1−V2)/V1*100≥45% wherein V1 is a volume fraction (vol %) of silicon-based active material particles having a gray scale value of 30,000 or more in an XRM measurement on a negative electrode in a fully discharged state after formation, and V2 is a volume fraction (vol %) of silicon-based active material particles having a gray scale value of 30,000 or more in an XRM measurement on a negative electrode in a fully charged state after 500 cycles of charging and discharging.
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公开(公告)号：US20230420642A1
公开(公告)日：2023-12-28
申请号：US18338348
申请日：2023-06-21
发明人： Eun Jun PARK , Gwi Ok PARK , Hyo Shik KIL , In Ae LEE
IPC分类号： H01M4/134 , H01M10/052 , H01M4/139
CPC分类号： H01M4/134 , H01M10/052 , H01M4/139 , H01M2004/027
摘要： Provided are a negative electrode for a lithium secondary battery and a method of manufacturing the same. The negative electrode for a lithium secondary battery according to an embodiment of the present invention includes a silicon-based negative electrode active material including iron and aluminum, wherein in ICP analysis of a negative electrode active material layer including the silicon-based negative electrode active material, contents of elements in the negative electrode active material layer satisfy the following Relations (1) to (3):
A/(B2+C2)≤4,500 (1)
5≤B≤1,500 (2)
3≤C≤1,000 (3)
wherein A is a Li content in ppm, B is an Fe content in ppm, and C is an Al content in ppm, based on the total weight of the ICP-analyzed negative electrode active material layer.-
公开(公告)号：US20240363833A1
公开(公告)日：2024-10-31
申请号：US18770656
申请日：2024-07-12
申请人： SK On Co., Ltd.
发明人： Eun Jun PARK , Gwi Ok PARK , Hyo Shik KIL , In Ae LEE
IPC分类号： H01M4/134 , B82Y30/00 , H01M4/02 , H01M4/139 , H01M10/052
CPC分类号： H01M4/134 , H01M4/139 , H01M10/052 , B82Y30/00 , H01M2004/027
摘要： Provided are a negative electrode for a lithium secondary battery and a method of manufacturing the same. The negative electrode for a lithium secondary battery according to an embodiment of the present invention includes a silicon-based negative electrode active material including iron and aluminum, wherein in ICP analysis of a negative electrode active material layer including the silicon-based negative electrode active material, contents of elements in the negative electrode active material layer satisfy the following Relations (1) to (3):
A
/
(
B
2
+
C
2
)
≤
4
,
500
(
1
)
5
≤
B
≤
1
,
500
(
2
)
3
≤
C
≤
1
,
000
(
3
)
wherein A is a Li content in ppm, B is an Fe content in ppm, and C is an Al content in ppm, based on the total weight of the ICP-analyzed negative electrode active material layer.-
公开(公告)号：US20230420666A1
公开(公告)日：2023-12-28
申请号：US18339237
申请日：2023-06-22
申请人： SK On Co., Ltd.
发明人： Eun Jun PARK , Gwi Ok PARK , Hyo Shik KIL , In Ae LEE
IPC分类号： H01M4/38 , H01M10/0525 , H01M4/131 , H01M4/04 , H01M4/1391 , H01M4/134 , H01M4/1395
CPC分类号： H01M4/386 , H01M10/0525 , H01M4/131 , H01M4/0471 , H01M4/1391 , H01M4/134 , H01M4/1395 , H01M2004/027
摘要： Provided are a negative electrode for a lithium secondary battery and a method of manufacturing the same. The negative electrode for a lithium secondary battery according to an embodiment of the present invention includes a negative electrode active material including: a silicon oxide, lithium, and sodium or potassium, wherein in ICP analysis of a negative electrode active material layer including the negative electrode active material, contents of elements in the negative electrode active material layer satisfy the following Relations (1) and (2):
300≤106*A/(B2+C2)≤12.0*106 (1)
800≤A≤140,000 (2)
wherein A is a Li content in ppm, B is a Na content in ppm, and C is a K content in ppm, based on the total weight of the ICP-analyzed negative electrode active material layer.-
公开(公告)号：US20230084565A1
公开(公告)日：2023-03-16
申请号：US17945044
申请日：2022-09-14
申请人： SK ON CO., LTD.
发明人： Ju Ho CHUNG , Jik Soo KIM , Gwi Ok PARK
IPC分类号： H01M4/36 , H01M4/38 , H01M4/62 , H01M4/587 , H01M10/0562 , H01M10/0525
摘要： An anode active material for a lithium secondary battery includes a core portion including a solid electrolyte, and a shell portion encapsulating the core portion and including a silicon-based active material. A lithium secondary includes a case and an electrode assembly accommodated in the case. The electrode assembly includes an anode including the anode active material and a cathode facing the anode.
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公开(公告)号：US20240282915A1
公开(公告)日：2024-08-22
申请号：US18584695
申请日：2024-02-22
申请人： SK On Co., Ltd.
发明人： Gwi Ok PARK , Eun Jun PARK , Hyo Shik KIL , In Ae LEE
CPC分类号： H01M4/362 , H01M4/386 , H01M4/483 , H01M4/5825 , H01M2004/021 , H01M2004/027 , H01M10/0525
摘要： Provided are a negative electrode for a lithium secondary battery and a method of manufacturing the same. An implementation may provide a negative electrode for a lithium secondary battery including: a Si-containing negative electrode active material, wherein when a value derived according to the following Equation (1) by charging/discharging a lithium secondary battery including a negative electrode and a positive electrode including a Li-containing positive electrode active material n times, discharging the battery to 2.5 V, disassembling the battery to obtain the negative electrode and the positive electrode, and analyzing the negative electrode and the positive electrode is SEIn, a (SEI100−SEI5) value is 10 or less: (1) SEIn=([Si]0/[Si]n−1)−((CLL*CW/CMW*(1−MLi/MTM)*LiMW)/ALL).
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10.发明公开公开(公告)号：US20240088389A1
公开(公告)日：2024-03-14
申请号：US18509313
申请日：2023-11-15
申请人： SK ON CO., LTD.
发明人： Gwi Ok PARK , Seok Keun YOO , Ju Ho CHUNG
IPC分类号： H01M4/587 , H01M4/04 , H01M4/1393 , H01M4/1395 , H01M4/38 , H01M10/0525
CPC分类号： H01M4/587 , H01M4/0471 , H01M4/1393 , H01M4/1395 , H01M4/386 , H01M10/0525 , H01M2004/021
摘要： An anode active material for a lithium secondary battery and a lithium secondary battery are provided. The anode active material includes a carbon-based particle including pores formed in at least one of an inside of the particle and a surface of the particle and having a pore size of the carbon-based particle is 20 nm or less, and silicon formed at an inside of the pores of the carbon-based particle or on the surface of the carbon-based particle. Silicon has an amorphous structure or a crystallite size of silicon measured by an XRD analysis is 7 nm or less. Difference between volume expansion ratios of carbon and silicon can be reduced to improve life-span property of the secondary battery.
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