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1.发明公开公开(公告)号：US20230155119A1
公开(公告)日：2023-05-18
申请号：US18098415
申请日：2023-01-18
Applicant: NEXEON LTD.
Inventor： Seung Chul Park , Eui Joon Song , Young Tai Cho , Jee Hye Park
IPC: H01M4/38 , C01B33/021 , H01M4/36 , H01M4/134 , H01M4/1395 , H01M10/052
CPC classification number: H01M4/386 , C01B33/021 , H01M4/36 , H01M4/38 , H01M4/134 , H01M4/1395 , H01M10/052 , H01M2004/021
Abstract: The present invention relates to a negative electrode active material for a secondary battery and a manufacturing method thereof. A negative electrode active material, according to one embodiment of the present invention, comprises silicon-based primary particles, and a particle size distribution of the silicon-based primary particles is D10≥50 nm and D90≤150 nm. The negative electrode active material suppresses or reduces tensile hoop stress generated in lithiated silicon particles during a charging of a battery to thus suppress a crack due to a volume expansion of the silicon particles and/or an irreversible reaction caused by the crack, such that the lifetime and capacity of the battery can be improved.
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公开(公告)号：US10586976B2
公开(公告)日：2020-03-10
申请号：US15305763
申请日：2015-04-22
Applicant: Nexeon Ltd
Inventor： Young Tai Cho , Seung Chul Park , Seon Park , Hee Young Seo , Jee Hye Park , Yong Eui Lee , Chul Hwan Kim
IPC: H01M4/134 , H01M4/38 , H01M10/052 , H01M4/36 , H01M10/0525 , H01M4/62 , H01M4/02
Abstract: Provided is a negative active material and a lithium secondary battery including the negative active material. The negative active material for a secondary battery includes silicon particles, wherein circularities of the particles are determined by equation 1 below, and the circularities are 0.5 or greater and 0.9 or less, Circularity=2(pi×A)1/2/P [Equation 1] where A denotes a projected area of the silicon particle that is two-dimensionally projected, and P denotes a circumferential length of the silicon particle that is two-dimensionally projected.
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公开(公告)号：US10522824B2
公开(公告)日：2019-12-31
申请号：US15327744
申请日：2015-07-21
Applicant: Nexeon Ltd
Inventor： Young Tai Cho , Yong Gil Choi , Seung Chul Park , Seon Park , Hee Young Seo , Jee Hye Park , Yong Eui Lee , Chul Hwan Kim
Abstract: The present invention relates to a method for preparing silicon-based active material particles for a secondary battery and silicon-based active material particles. The method for preparing silicon-based active material particles according to an embodiment of the present invention comprises the steps of: providing silicon powder; dispersing the silicon powder into an oxidant solvent to provide a mixture prior to grinding; fine-graining the silicon powder by applying mechanical compression and shear stress to the silicon powder in the mixture prior to grinding to produce silicon particles; producing a layer of chemical oxidation on the fine-grained silicon particles with the oxidant solvent while applying mechanical compression and shear stress to produce silicon-based active material particles; and drying the resulting product comprising the silicon-based active material particles to yield silicon-based active material particles.
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4.发明授权公开(公告)号：US10396355B2
公开(公告)日：2019-08-27
申请号：US15302957
申请日：2015-04-09
Applicant: Nexeon Ltd
Inventor： Young Tai Cho , Seung Chul Park , Seon Park , Hee Young Seo , Jee Hye Park , Yong Eui Lee , Chul Hwan Kim
Abstract: Provided is an anode active material for a secondary battery and a method of fabricating the anode active material. A silicon-based active material composite according to an embodiment of the inventive concept includes silicon and silicon oxide obtained by oxidizing at least a part of the silicon, and an amount of oxygen with respect to a total weight of the silicon and the silicon oxide is restricted to 9 wt % to 20 wt %.
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公开(公告)号：US10797303B2
公开(公告)日：2020-10-06
申请号：US15561171
申请日：2016-03-25
Applicant: Nexeon Ltd
Inventor： Young Tai Cho , Yong Gil Choi , Seung Chul Park , Seon Park , Hee Young Seo , Jee Hye Park , Yong Eui Lee , Chul Hwan Kim
Abstract: The present invention relates to a silicon-based anode active material and a method of fabricating the same. The silicon-based anode active material according to an embodiment of the present invention comprises: particles comprising silicon and oxygen combined with the silicon, wherein a carbon-based conductive layer is coated with on outermost surface of the particles; and phosphorus doped in the particles, wherein a content of the phosphorus with respect to a total weight of the particles and the phosphorus doped in the particles have a range of 0.01 wt % to 15 wt %, and a content of the oxygen has a range of 9.5 wt % to 25 wt %.
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Patent Agency Ranking
公开(公告)号：US10673072B2
公开(公告)日：2020-06-02
申请号：US15553294
申请日：2015-02-24
Applicant: Nexeon Ltd.
Inventor： Young Tai Cho , Yong Gil Choi , Seon Park , Young Jae Lee , Hee Young Seo , Jee Hye Park , Yong Eui Lee , Young Jin Hong
Abstract: The present invention relates to a silicon anode active material capable of high capacity and high output, and a method for fabricating the same. A silicon anode active material according to an embodiment of the present invention includes a silicon core including silicon particles; and a double clamping layer having a silicon carbide layer on the silicon core and a silicon oxide layer between the silicon core and the silicon carbide layer.
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公开(公告)号：US20190198869A1
公开(公告)日：2019-06-27
申请号：US16326873
申请日：2017-08-23
Applicant: NEXEON LTD.
Inventor： Seung Chul Park , Eui Joon Song , Young Tai Cho , Jee Hye Park
IPC: H01M4/38 , H01M4/1395 , H01M4/134 , C01B33/021 , H01M10/052
CPC classification number: H01M4/386 , C01B33/021 , H01M4/134 , H01M4/1395 , H01M4/36 , H01M4/38 , H01M10/052 , H01M2004/021 , H01M2004/028
Abstract: The present invention relates to a cathode active material for a secondary battery and a manufacturing method thereof. A cathode active material, according to one embodiment of the present invention, comprises silicon-based primary particles, and a particle size distribution of the silicon-based primary particles is D10≥50 nm and D90≤150 nm. The cathode active material suppresses or reduces tensile hoop stress generated in lithiated silicon particles during a charging of a battery to thus suppress a crack due to a volume expansion of the silicon particles and/or an irreversible reaction caused by the crack, such that the lifetime and capacity of the battery can be improved.
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公开(公告)号：US11588152B2
公开(公告)日：2023-02-21
申请号：US16326873
申请日：2017-08-23
Applicant: NEXEON LTD.
Inventor： Seung Chul Park , Eui Joon Song , Young Tai Cho , Jee Hye Park
IPC: H01M4/38 , C01B33/021 , H01M4/36 , H01M4/134 , H01M4/1395 , H01M10/052 , H01M4/02
Abstract: The present invention relates to a cathode active material for a secondary battery and a manufacturing method thereof. A cathode active material, according to one embodiment of the present invention, comprises silicon-based primary particles, and a particle size distribution of the silicon-based primary particles is D10≥50 nm and D90≤150 nm. The cathode active material suppresses or reduces tensile hoop stress generated in lithiated silicon particles during a charging of a battery to thus suppress a crack due to a volume expansion of the silicon particles and/or an irreversible reaction caused by the crack, such that the lifetime and capacity of the battery can be improved.
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公开(公告)号：US11196042B2
公开(公告)日：2021-12-07
申请号：US16439602
申请日：2019-06-12
Applicant: Nexeon Ltd
Inventor： Young Tai Cho , Yong Gil Choi , Seung Chul Park , Seon Park , Hee Young Seo , Jee Hye Park , Yong Eui Lee , Chul Hwan Kim
Abstract: The present invention relates to a method for preparing silicon-based active material particles for a secondary battery and silicon-based active material particles. The method for preparing silicon-based active material particles according to an embodiment of the present invention comprises the steps of: providing silicon powder; dispersing the silicon powder into an oxidant solvent to provide a mixture prior to grinding; fine-graining the silicon powder by applying mechanical compression and shear stress to the silicon powder in the mixture prior to grinding to produce silicon particles; producing a layer of chemical oxidation on the fine-grained silicon particles with the oxidant solvent while applying mechanical compression and shear stress to produce silicon-based active material particles; and drying the resulting product comprising the silicon-based active material particles to yield silicon-based active material particles.
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10.发明授权公开(公告)号：US11171332B2
公开(公告)日：2021-11-09
申请号：US16326672
申请日：2017-08-23
Applicant: NEXEON LTD.
Inventor： Seung Chul Park , Eui Joon Song , Min Young Cheong , Jong Hun Lee , Young Tai Cho , Yong Gil Choi , Seon Park , Sung Hwan Kang , Hee Young Seo , Jee Hye Park , Tae Jin Yang
IPC: H01M4/38 , H01M4/04 , H01M4/134 , H01M4/36 , C01B33/021
Abstract: The present invention relates to a method for producing silicon-based active material particles for a secondary battery and silicon-based active material particles. A method for producing silicon-based active material particles for a secondary battery according to an embodiment of the present invention may comprise: a step of providing silicon powder; a step of providing a pre-pulverization mixture in which the silicon powder is dispersed in a solvent for dispersion comprising an antioxidant; a step of applying mechanical compression and shear stress to the silicon powder of the pre-pulverization mixture to refine the silicon powder, thereby forming silicon particles having an oxygen content controlled by the antioxidant; and a step of drying the resulting material comprising the silicon particles to obtain silicon-based active material particles.
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