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公开(公告)号：US11688854B2
公开(公告)日：2023-06-27
申请号：US17692881
申请日：2022-03-11
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 , H01M10/0525 , H01M4/02
CPC分类号： H01M4/587 , H01M4/0471 , H01M10/0525 , H01M2004/021 , H01M2004/027
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. A peak intensity ratio in a Raman spectrum of silicon defined as I(515)/I(480) is 1.2 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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公开(公告)号：US20230130685A1
公开(公告)日：2023-04-27
申请号：US17970259
申请日：2022-10-20
发明人： Min Kyung Seon , Gwi Ok Park , Seok Keun Yoo , Dong Gun Lee , Jun Soo Son , Ju Ho Chung
摘要： Provided are a binder composition for a secondary battery, a negative electrode including the same, and a secondary battery including the same. More particularly, the binder composition for a secondary battery having a three-dimensional structure, which is prepared by mixing a copolymer having specific repeating units and a polymer-type additive containing nitrogen (N) bonded to two or three carbons (C) in the repeating unit, has excellent mechanical properties and may effectively improve a binding force. The negative electrode and the secondary battery including the binder composition for a secondary battery effectively suppress expansion of a negative electrode to manufacture a secondary battery having excellent charge/discharge cycle characteristics and battery performance.
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公开(公告)号：US12074312B2
公开(公告)日：2024-08-27
申请号：US18338348
申请日：2023-06-21
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 , H01M4/139 , H01M10/052 , B82Y30/00 , H01M4/02
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/(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：US11870065B1
公开(公告)日：2024-01-09
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 , H01M4/1391 , H01M4/134 , H01M4/1395 , H01M4/04 , H01M4/02
CPC分类号： H01M4/386 , H01M4/0471 , H01M4/131 , H01M4/134 , H01M4/1391 , H01M4/1395 , H01M10/0525 , 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：US20230187640A1
公开(公告)日：2023-06-15
申请号：US18078162
申请日：2022-12-09
发明人： Jun Soo Son , Gwi Ok Park , Seok Keun Yoo , Min Kyung Seon , Ji Sang Jeong , Ju Ho Chung
CPC分类号： H01M4/622 , H01M4/0404 , H01M4/386 , H01M4/583 , H01M4/364 , H01M10/052 , H01M2004/027
摘要： Provided is a novel binder for a secondary battery including a copolymer for a binder for a secondary battery containing specific repeating units. A negative electrode manufactured by mixing the binder with a negative electrode active material and a secondary battery including the negative electrode have excellent mechanical properties and an improved binding force, thereby effectively suppressing exfoliation and desorption of the negative electrode and expansion of the negative electrode even when a silicon-based negative electrode active material is used, and providing a negative electrode for a secondary battery having improved charge/discharge cycle characteristics and battery performance, and a secondary battery including the same.
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6.发明授权公开(公告)号：US11967705B2
公开(公告)日：2024-04-23
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
CPC分类号： H01M4/366 , H01M4/0471 , H01M4/386 , H01M4/587 , H01M10/0525 , H01M2004/021 , H01M2004/027
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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公开(公告)号：US20220399545A1
公开(公告)日：2022-12-15
申请号：US17839764
申请日：2022-06-14
申请人： SK On Co., Ltd.
发明人： Joon Hyung Moon , Eun Jun Park , Ju Ho Chung , Gwi Ok Park , Seok Keun Yoo
IPC分类号： H01M4/583 , H01M4/36 , H01M4/04 , H01M4/48 , H01M10/052
摘要： Provided is a negative electrode active material for a lithium secondary battery including: a silicon oxide (SiOx, 0
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8.发明授权公开(公告)号：US12021230B2
公开(公告)日：2024-06-25
申请号：US17495876
申请日：2021-10-07
申请人： SK On Co., Ltd.
发明人： Ju Ho Chung , Gwi Ok Park , Joon Sup Kim , Eun Jun Park , Dong Il Jang
IPC分类号： H01M4/38 , H01M4/04 , H01M4/583 , H01M10/0525
CPC分类号： H01M4/386 , H01M4/0471 , H01M4/583 , H01M10/0525
摘要： Provided is a lithium secondary battery including a silicon-based anode active material for a lithium secondary battery and an anode formed using the same. The silicon-based anode active material for a lithium secondary battery according to exemplary embodiments includes a surface coated with carbon and doped with lithium. A ratio of a peak area at 102.5 eV to a total area of a peak area at 100 eV, the peak area at 102.5 eV, and a peak area at 104 eV, which appear in an Si2p spectrum when measuring by X-ray photoelectron spectroscopy (XPS), is 40% or less, thereby allowing an electrode to be stably manufactured without changing physical properties of the slurry during manufacturing the electrode. In addition, the anode active material for a secondary battery may be usefully used to manufacture a lithium secondary battery having high discharge capacity and high energy density characteristics.
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公开(公告)号：US11791458B2
公开(公告)日：2023-10-17
申请号：US17494884
申请日：2021-10-06
申请人： SK ON CO., LTD.
发明人： Gwi Ok Park , Ju Ho Chung , Joon Sup Kim , Eun Jun Park , Dong Il Jang
CPC分类号： H01M4/366 , H01M4/483 , H01M4/587 , H01M10/0525 , H01M2004/027 , H01M2220/20
摘要： According to embodiments of the present invention, there is provided an anode active material for a lithium secondary battery including a silicon oxide which includes a carbon coating layer on a surface thereof and is doped with magnesium. A ratio of peak area at 1303 eV to a sum of a peak area at 1304.5 eV and a peak area at 1303 eV, which appear in a Mg1s spectrum when measuring by X-ray photoelectron spectroscopy (XPS), is 60% or less.
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公开(公告)号：US20230187641A1
公开(公告)日：2023-06-15
申请号：US18078214
申请日：2022-12-09
发明人： Dong Gun Lee , Gwi Ok Park , Seok Keun Yoo , Min Kyung Seon , Jun Soo Son , Ju Ho Chung
IPC分类号： H01M4/62 , C08F216/06 , C08F220/06 , C08K5/17
CPC分类号： H01M4/622 , C08F216/06 , C08F220/06 , C08K5/17
摘要： Provided are a novel binder for a secondary battery including a copolymer containing specific repeating units, and a binder composition for a secondary battery including the binder for a secondary battery and a compound containing an amine group and a hydroxyl group. When the binder for a secondary battery or the binder composition for a secondary battery is applied to a negative electrode and a secondary battery, expansion of the negative electrode is effectively suppressed, and the charge/discharge cycle characteristics and the performance of the secondary battery are significantly improved. Furthermore, the binder for a secondary battery has improved coatability and adhesion to effectively suppress the exfoliation and desorption of the negative electrode, thereby improving the performance of the secondary battery.
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