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公开(公告)号：US11050056B2
公开(公告)日：2021-06-29
申请号：US16347413
申请日：2017-11-13
发明人： Cheol Ho Park , Seon Kyong Kim , Min Hyun Kim
摘要： The present invention relates to a negative electrode active material for a secondary battery, including: a Si main phase formed of crystalline Si; and a matrix coexisting with the Si main phase, in which at least a part of the matrix has a crystal lattice parameter which is any one among n times, 1/n time, n√2 times, n/√2 times, and n√5 times of a crystal lattice parameter of the Si main phase (n is an integer).
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2.发明申请公开(公告)号：US20170352911A1
公开(公告)日：2017-12-07
申请号：US15541470
申请日：2016-02-26
发明人： Young Pil Choi , Cheol Ho Park , Min Hyun Kim , Myeong Han Kim , Seon Kyong Kim
CPC分类号： H01M10/052 , H01M4/13 , H01M4/133 , H01M4/134 , H01M4/364 , H01M4/38 , H01M4/386 , H01M4/587 , H01M4/62 , H01M4/622 , H01M4/625
摘要： The present disclosure is to provide a negative electrode for a lithium secondary battery having high negative electrode efficiency and excellent capacity retention, and a lithium secondary battery including the negative electrode. In one aspect, there is provided a negative electrode for a lithium secondary battery, wherein the electrode contains 3 to 9% by weight of a silicon-based negative-electrode active material having a following composition formula (1); and 87.5 to 95.5% by weight of a graphite-based negative-electrode active material: SixTiyFezAlu (i) where x, y, z and u are atomic %, x: 1−(y+z+u), y: 0.09 to 0.14, z: 0.09 to 0.14, u: 0.01 exclusive to 0.2 exclusive.
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3.发明授权公开(公告)号：US10734644B2
公开(公告)日：2020-08-04
申请号：US15738666
申请日：2016-05-31
发明人： Cheol Ho Park , Min Hyun Kim , Young Pil Choi , Seon Kyong Kim
摘要： Provided are a negative electrode active material for a secondary battery, in which a silicon-based negative electrode active material is formed in a three-layer structure including an amorphous matrix, thereby suppressing a dispersal phenomenon of the negative electrode active material during charging/discharging. The negative electrode active material having a three-layer structure includes: a silicon (Si) layer; an amorphous matrix layer outside the Si layer; and a nano grain matrix layer formed on an interface between the Si layer and the amorphous matrix layer.
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公开(公告)号：US10283766B2
公开(公告)日：2019-05-07
申请号：US15109394
申请日：2014-12-09
发明人： Cheol Ho Park , Seon Kyong Kim , Seung Chul Lee , Young Pil Choi , Hyang Yeon Kim , Jae Woong Kim , Min Seok Sung
IPC分类号： C22C28/00 , H01M10/0525 , H01M4/04 , H01M4/134 , H01M4/38 , C22C1/00 , C22C45/00 , H01M10/052 , H01M4/02
摘要： A negative electrode active material for a lithium secondary battery according to an exemplary embodiment of the present invention includes an alloy containing silicon (Si), titanium (Ti), and iron (Fe), wherein the degree of amorphization of the alloy is raised by 40% or more by further adding copper (Cu) to the alloy.
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公开(公告)号：US10589350B2
公开(公告)日：2020-03-17
申请号：US15522624
申请日：2015-10-19
发明人： Young Pil Choi , Cheol Ho Park , Min Hyun Kim , Myeong Han Kim
IPC分类号： B22D11/112 , B22D11/113 , B22D11/124 , B22D11/06 , B22D21/02
摘要： Disclosed is a continuous rapid solidification apparatus, which has a cooling roll configured to cool a molten metal supplied to an outer circumference surface thereof; a crucible configured to supply the cooling roll with the molten metal; a molten metal supply configured to melt a raw material metal and supply the crucible with the molten metal; a first chamber configured to form a sealed space where the molten metal supplied from the crucible is cooled by the cooling roll; and a second chamber configured to be formed of a space separated from the first chamber and to form a sealed space where the molten metal is supplied to the crucible by the molten metal supply.
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6.发明申请公开(公告)号：US20190312271A1
公开(公告)日：2019-10-10
申请号：US16347413
申请日：2017-11-13
发明人： Cheol Ho Park , Seon Kyong Kim , Min Hyun Kim
IPC分类号： H01M4/38 , H01M10/0525 , H01M4/134 , H01M4/04
摘要： The present invention relates to a negative active material for a secondary battery, the anode active material comprising: an Si main phase including crystalline Si; and a matrix coexisting with the Si main phase, wherein at least a part of the matrix has a crystal lattice parameter which is one among n times, 1/n times, n√2 times, n/√2 times, and n√5 times (n is an integer) that of the Si main phase.
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公开(公告)号：US20160372745A1
公开(公告)日：2016-12-22
申请号：US15117449
申请日：2015-02-10
发明人： Young Pil Choi , Cheol Ho Park , Seon Kyong Kim , Hyang Yeon Kim , Seung Chul Lee , Jae Woong Kim , Min Seok Sung
IPC分类号： H01M4/46 , H01M4/134 , C22C30/02 , B22D25/04 , C22C1/02 , B22D11/06 , B22D11/00 , H01M10/0525 , C22C28/00
CPC分类号： H01M4/463 , B22D11/001 , B22D11/0611 , B22D25/04 , C22C1/02 , C22C28/00 , C22C30/02 , H01M4/134 , H01M4/386 , H01M10/052 , H01M10/0525
摘要： A negative electrode active material for a lithium secondary battery according to an exemplary embodiment of the present invention includes an alloy including silicon (Si), copper (cu), and aluminum (Al) of 40 to 70 at %, wherein the ratio of aluminum (Al) to copper (Cu) included in the alloy is substantailly 10:90 to 30:70, and the alloy further includes iron (Fe), and further includes zirconium (Zr) or titanium (Ti).
摘要翻译： 根据本发明的示例性实施方案的用于锂二次电池的负极活性材料包括含有硅（Si），铜（cu）和铝（Al）的合金，其含量为40至70原子％，其中铝 （Al）与合金中所含的铜（Cu）的比例为10:90〜30:70，合金还含有铁（Fe），还含有锆（Zr）或钛（Ti）。
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公开(公告)号：US20160329561A1
公开(公告)日：2016-11-10
申请号：US15109394
申请日：2014-12-09
发明人： Cheol Ho Park , Seon Kyong Kim , Seung Chul Lee , Young Pil Choi , Hyang Yeon Kim , Jae Woong Kim , Min Seok Sung
IPC分类号： H01M4/38 , H01M4/04 , C22C28/00 , H01M10/0525 , H01M4/134
CPC分类号： H01M4/386 , C22C1/002 , C22C28/00 , C22C45/00 , H01M4/0471 , H01M4/134 , H01M10/052 , H01M10/0525 , H01M2004/027 , H01M2220/30
摘要： A negative electrode active material for a lithium secondary battery according to an exemplary embodiment of the present invention includes an alloy containing silicon (Si), titanium (Ti), and iron (Fe), wherein the degree of amorphization of the alloy is raised by 40% or more by further adding copper (Cu) to the alloy.
摘要翻译： 根据本发明的示例性实施方案的用于锂二次电池的负极活性材料包括含有硅（Si），钛（Ti）和铁（Fe）的合金，其中合金的非晶化程度由 通过进一步向合金中加入铜（Cu），为40％以上。
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公开(公告)号：US10566616B2
公开(公告)日：2020-02-18
申请号：US15527351
申请日：2015-12-01
发明人： Young Pil Choi , Cheol Ho Park , Min Hyun Kim , Myeong Han Kim , Seon Kyong Kim
IPC分类号： H01M10/0525 , H01M4/38 , H01M10/052 , H01M4/02
摘要： Disclosed is a negative active material having a reduced volume change during charge/discharge. A fine crystalline region exists on a matrix of an alloy, and lithium is easily dispersed due to the fine crystalline region. In the negative active material, a ratio of the fine crystalline region is represented by an amorphization degree, and is optimized in designing a battery through a measurement of an expansion rate after 50 cycles. The negative active material is used for a secondary battery and includes an alloy formed by a chemical formula below: (a ratio of Ti to Fe is 1:1 and a ratio of Si:Ti or Si:Fe has a range of 5:1 to 9:1.) Si—−xTiyFezAlu where x, y, z, and u are at %, x: 1−(y+z+u), y: 0.09 to 0.14, z: 0.09 to 0.14, and u: larger than 0.01 and less than 0.2.
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公开(公告)号：US20170331105A1
公开(公告)日：2017-11-16
申请号：US15527351
申请日：2015-12-01
发明人： Young Pil Choi , Cheol Ho Park , Min Hyun Kim , Myeong Han Kim , Seon Kyong Kim
IPC分类号： H01M4/38 , H01M10/0525 , H01M4/02
摘要： Disclosed is a negative active material having a reduced volume change during charge/discharge. A fine crystalline region exists on a matrix of an alloy, and lithium is easily dispersed due to the fine crystalline region. In the negative active material, a ratio of the fine crystalline region is represented by an amorphization degree, and is optimized in designing a battery through a measurement of an expansion rate after 50 cycles. The negative active material is used for a secondary battery and includes an alloy formed by a chemical formula below: (a ratio of Ti to Fe is 1:1 and a ratio of Si:Ti or Si:Fe has a range of 5:1 to 9:1.) Si—−xTiyFezAlu where x, y, z, and u are at %, x: 1−(y+z+u), y: 0.09 to 0.14, z: 0.09 to 0.14, and u: larger than 0.01 and less than 0.2.
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