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1.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：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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3.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：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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5.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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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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公开(公告)号：US20170320130A1
公开(公告)日：2017-11-09
申请号：US15522607
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： B22D11/06
CPC分类号： B22D11/0682 , B22D11/0611 , B22D11/113
摘要： Disclosed is a continuous rapid solidification apparatus, which comprises 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; and two or more molten metal supplies configured to melt raw material metal and sequentially supply the crucible with the molten metal.
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公开(公告)号：US10892478B2
公开(公告)日：2021-01-12
申请号：US15738649
申请日：2016-05-31
发明人： Cheol Ho Park , Min Hyun Kim , Young Pil Choi , Seon Kyong Kim
IPC分类号： H01M4/36 , H01M4/38 , H01M4/134 , H01M4/1395 , C01B33/037 , H01M10/0525 , H01M10/052 , H01M4/02
摘要： Provided are a negative electrode active material for a secondary battery, which suppresses a dispersal phenomenon of a negative electrode active material during charging/discharging by controlling a lattice mismatch ratio of an amorphous matrix layer to a silicon layer in a silicon-based negative electrode active material.
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10.发明授权公开(公告)号：US10297856B2
公开(公告)日：2019-05-21
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
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 (1) 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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