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公开(公告)号：US20240372072A1
公开(公告)日：2024-11-07
申请号：US18383660
申请日：2023-10-25
Applicant: SAMSUNG SDI CO., LTD.
Inventor： Jungho LEE , Youngugk KIM , Yookyung KIM , Sungwon JUNG , Jaehou NAH , Hyun SOH , Doori OH
IPC: H01M4/36 , H01M4/04 , H01M4/38 , H01M4/583 , H01M10/052
Abstract: A negative electrode active material composite, including an amorphous carbon matrix, and silicon nanoparticles and crystalline carbon fibers dispersed in the amorphous carbon matrix, the silicon nanoparticles being in contact with a portion or all of the crystalline carbon fibers in the amorphous carbon matrix.
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公开(公告)号：US20200152970A1
公开(公告)日：2020-05-14
申请号：US16630175
申请日：2018-07-10
Applicant: SAMSUNG SDI CO., LTD.
Inventor： Sangeun PARK , Jiyeon KWAK , Yeongap KIM , Youngugk KIM , Uisong DO , Yuntaek OH , Yongchan YOU , Changui JEONG , Inoh CHA , Hee Seon CHOI
IPC: H01M4/36 , H01M10/0525 , H01M4/38 , H01M4/587 , H01M4/62 , C04B35/628 , C04B35/626 , C04B35/52
Abstract: The present invention relates to a negative active material for a lithium secondary battery, a preparation method therefor, and a lithium secondary battery including the same. The negative electrode active material is a negative electrode material for a secondary battery, the negative electrode active material comprising a silicon-carbon composite comprising: a core comprising crystalline carbon and silicon particles; and an amorphous carbon-containing coating layer disposed on a surface of the core, wherein the negative electrode active material comprises: silicon oxide formed on a surface of the silicon particles; and an oxide of crystalline carbon, formed on a surface of the crystalline carbon, the average particle diameter (D50) of the silicon particles having a nanometer size, the proportion of O relative to Si in the silicon oxide is 30%-50%, and the proportion of O relative to C in the oxide of the crystalline carbon is 4%-10%.
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公开(公告)号：US20250125342A1
公开(公告)日：2025-04-17
申请号：US18731582
申请日：2024-06-03
Inventor： Seyoung OH , Sang-Min LEE , Hwijoo LEE , Ilyoung CHOI , Deok-Hyun KIM , Youngugk KIM
Abstract: A negative electrode active material and a rechargeable lithium battery including the negative electrode active material, the negative electrode active material includes a core including a carbon material; vanadium oxide on a surface of the core; and a fluorine (F)-containing carbon layer on the surface of the core and on a surface of the vanadium oxide.
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公开(公告)号：US20240170650A1
公开(公告)日：2024-05-23
申请号：US18383684
申请日：2023-10-25
Applicant: SAMSUNG SDI CO., LTD.
Inventor： Sunil PARK , Young-Min KIM , Youngugk KIM , Changsu SHIN , Doori OH , Jongmin WON , Dae-Hyeok LEE , Sungwon JUNG
IPC: H01M4/36 , H01M4/583 , H01M10/052
CPC classification number: H01M4/366 , H01M4/583 , H01M10/052 , H01M2004/021
Abstract: A negative active material for a rechargeable lithium battery, having a silicon-carbon composite in which crystalline carbon, silicon particles, and amorphous carbon are agglomerated, and single-walled carbon nanotubes are coated on the silicon-carbon composite, to ameliorate the negative effects caused by the expansion and contraction of the volume of a silicon-based negative active material during charging and discharging.
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公开(公告)号：US20230135650A1
公开(公告)日：2023-05-04
申请号：US17944630
申请日：2022-09-14
Applicant: SAMSUNG SDI CO., LTD.
Inventor： Young-Min KIM , Eunji KANG , Youngugk KIM , Yookyung KIM , Sunil PARK , Changsu SHIN , Doori OH , Jongmin WON , Dae-Hyeok LEE , Jungho LEE
Abstract: A negative active material composite, a method of preparing the same, and a negative electrode and a rechargeable lithium battery including the same, the negative active material composite including compound particles represented by SiOx, in which 0
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Patent Agency Ranking
公开(公告)号：US20250038186A1
公开(公告)日：2025-01-30
申请号：US18613370
申请日：2024-03-22
Applicant: SAMSUNG SDI CO., LTD.
Inventor： Heeyoung CHU , Yongseok KIM , Dae-Hyeok LEE , Sojeong YU , Hyejin KIM , Jaewon KIM , Youngugk KIM , Jaehou NAH
Abstract: A negative electrode active material and a rechargeable lithium battery that includes the negative electrode active material, the negative electrode active material includes porous silicon secondary particles in which boron-doped silicon primary particles are agglomerated; and amorphous carbon and the rechargeable lithium battery includes a negative electrode including the negative electrode active material, a positive electrode and an electrolyte.
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公开(公告)号：US20250023034A1
公开(公告)日：2025-01-16
申请号：US18383082
申请日：2023-10-24
Applicant: SAMSUNG SDI CO., LTD.
Inventor： Hyejin KIM , Pil Jin YOO , Deok-Hyun KIM , Youngugk KIM , Jaehou NAH , Ilyoung CHOI , Eunji KANG , Sunil PARK , Jaewon KIM , Doori OH , Yookyung KIM , Narae KIM , Banseok LEE
Abstract: A negative active material includes a core having a silicon-carbon composite and a polymer coating layer formed on the core, wherein the negative active material has about 1.02 to about 1.6 of a ratio of height of N1s peak occurring at about 400±about 0.5 eV relative to a height of N1s peak occurring at about 405±about 0.5 eV of a bonding energy, and about 1.02 to about 3.0 of a ratio of a height of C1s peak occurring at about 286.5±about 0.5 eV relative to a height of C1s peak occurring at about 290±about 0.5 eV when an X-ray photoelectron spectroscopy (XPS) is measured.
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8.发明申请公开(公告)号：US20240387797A1
公开(公告)日：2024-11-21
申请号：US18384401
申请日：2023-10-27
Applicant: SAMSUNG SDI CO., LTD.
Inventor： Dae-Hyeok LEE , Jaehou NAH , Youngugk KIM , Yongseok KIM , Heeyoung CHU , Sojeong YU , Hyejin KIM , Jaewon KIM
IPC: H01M4/36 , H01M4/04 , H01M4/38 , H01M4/583 , H01M10/052
Abstract: A negative electrode active material, including a silicon-carbon composite particle including a plurality of silicon nanoparticles and amorphous carbon, wherein the silicon-carbon composite particle includes closed pores therein, a pore volume of a surface of the silicon-carbon composite particle measured by a BJH method is less than about 0.02 cm3/g, and a volume of the closed pores of the silicon-carbon composite particle calculated by Equation 1 is about 0.015 cm3/g to about 0.05 cm3/g. Volume of closed pores in a particle = ( ( theoretical density ) - ( true density ) ) - 1 - ( pore volume measured by the BJH method ) [ Equation 1 ]
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公开(公告)号：US20240356041A1
公开(公告)日：2024-10-24
申请号：US18384494
申请日：2023-10-27
Applicant: SAMSUNG SDI CO., LTD.
Inventor： Jongmin WON , Jaehou NAH , Youngugk KIM , Changsu SHIN , Sunil PARK , Young-Min KIM , Eunji KANG , Doori OH , Yookyung KIM
IPC: H01M4/62 , H01M4/36 , H01M4/38 , H01M4/587 , H01M10/0525
CPC classification number: H01M4/628 , H01M4/366 , H01M4/386 , H01M4/587 , H01M10/0525 , H01M2004/027
Abstract: A negative active material, including a silicon-carbon composite including silicon and amorphous carbon, a metal oxide, and a metal silicate.
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公开(公告)号：US20240347703A1
公开(公告)日：2024-10-17
申请号：US18383647
申请日：2023-10-25
Applicant: SAMSUNG SDI CO., LTD.
Inventor： Sunil PARK , Changsu SHIN , Young-Min KIM , Eunji KANG , Doori OH , Jongmin WON , Yookyung KIM , Youngugk KIM
IPC: H01M4/36 , C01B32/158 , C01B32/159 , H01M4/133 , H01M4/134 , H01M4/38 , H01M4/587 , H01M10/052
CPC classification number: H01M4/366 , C01B32/158 , C01B32/159 , H01M4/133 , H01M4/134 , H01M4/386 , H01M4/587 , H01M10/052 , C01B2202/02 , C01B2202/06 , C01B2202/22 , C01P2006/40 , H01M2004/027
Abstract: A negative active material and a rechargeable lithium battery including the negative active material, the negative active material includes a silicon-carbon composite including nano-silicon and amorphous carbon; an N-doped carbon layer on the silicon-carbon composite; and a coating layer on the N-doped carbon layer, the coating layer including carbon nanotubes.
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