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公开(公告)号：US11316156B2
公开(公告)日：2022-04-26
申请号：US16541737
申请日：2019-08-15
Applicant: LG CHEM, LTD.
Inventor： Sang Wook Woo , Eun Kyung Kim , Yoon Ah Kang , Jun Hyuk Song , Oh Byong Chae
Abstract: A method of pre-lithiating a negative electrode for a secondary battery, including: dispersing a lithium metal powder, an inorganic material powder and a binder in a solvent to prepare a mixed solution; and applying the mixed solution to the negative electrode to form a lithium metal-inorganic composite layer on the negative electrode, thereby forming the pre-lithiated negative electrode. Also, a method for pre-lithiating a negative electrode having a high capacity by a simple process. Further, a negative electrode for a secondary battery manufactured through the pre-lithiation method provided in the present invention has an improved initial irreversibility, and secondary batteries manufactured using such a negative electrode for a secondary battery have excellent charge/discharge efficiency.
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公开(公告)号：US11316145B2
公开(公告)日：2022-04-26
申请号：US16606458
申请日：2018-08-03
Applicant: LG CHEM, LTD.
Inventor： Sang Wook Woo , Eun Kyung Kim , Yoon Ah Kang , Jun Hyuk Song , Oh Byong Chae
IPC: H01M4/04 , H01M4/1391 , H01M4/131 , H01M4/485 , H01M10/0525 , H01M4/02
Abstract: A method for pre-lithiation of a negative electrode and a negative electrode formed by the method, the method including forming a mixture of inorganic material powder and molten lithium, forming a lithium metal-inorganic material composite ribbon, rolling the ribbon into a film and bonding the lithium metal-inorganic material composite film on a surface of a negative electrode to form a lithium metal-inorganic material composite layer on the surface of the negative electrode. This method reduces the deterioration of lithium during application of a mixture slurry and a negative electrode for a secondary battery, manufactured by the method for pre-lithiation, has improved initial irreversibility, and a secondary battery manufactured using such a negative electrode has excellent charging and discharging efficiency.
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公开(公告)号：US10964946B2
公开(公告)日：2021-03-30
申请号：US16197964
申请日：2018-11-21
Applicant: LG Chem, Ltd.
Inventor： Su Min Lee , Dong Sub Jung , Eun Kyung Kim , Sang Wook Woo , Sun Young Shin
IPC: H01M4/587 , H01M4/133 , H01G11/32 , H01M4/36 , H01M10/052 , H01G11/24 , H01G11/38 , H01G11/50 , H01M4/02 , H01G11/28 , H01G11/42 , H01G11/06
Abstract: The present invention relates to an anode active material including natural graphite and mosaic coke-based artificial graphite, and a lithium secondary battery including the same. According to an embodiment of the present invention, an anode active material including natural graphite and mosaic coke-based artificial graphite is used, when applied to a lithium secondary battery, intercalation and deintercalation of lithium ions is more facilitated and conductivity of an electrode is improved even if no or little conductive material is used. Furthermore, the increase in conductivity can lead to not only a further improvement in rate performance of a lithium secondary battery but also a reduction in interfacial resistance.
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公开(公告)号：US20190165373A1
公开(公告)日：2019-05-30
申请号：US16197964
申请日：2018-11-21
Applicant: LG Chem, Ltd.
Inventor： Su Min Lee , Dong Sub Jung , Eun Kyung Kim , Sang Wook Woo , Sun Young Shin
Abstract: The present invention relates to an anode active material including natural graphite and mosaic coke-based artificial graphite, and a lithium secondary battery including the same. According to an embodiment of the present invention, an anode active material including natural graphite and mosaic coke-based artificial graphite is used, when applied to a lithium secondary battery, intercalation and deintercalation of lithium ions is more facilitated and conductivity of an electrode is improved even if no or little conductive material is used. Furthermore, the increase in conductivity can lead to not only a further improvement in rate performance of a lithium secondary battery but also a reduction in interfacial resistance.
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35.发明授权公开(公告)号：US10026956B2
公开(公告)日：2018-07-17
申请号：US14257094
申请日：2014-04-21
Applicant: LG Chem, Ltd.
Inventor： Hyun Wook Kim , Sang Wook Woo , Je Young Kim , Ki Tae Kim
Abstract: Provided are an anode including spherical natural graphite having a surface coated with an amorphous carbon layer, wherein a crystal orientation ratio is in a range of 0.06 to 0.08 at a compressed density of 1.40 g/cc to 1.85 g/cc, and a lithium secondary battery including the anode. Initial efficiency, electrode adhesion, and capacity characteristics of the lithium secondary battery may be improved by using the anode of the present invention in the lithium secondary battery.
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Patent Agency Ranking
公开(公告)号：US09997781B2
公开(公告)日：2018-06-12
申请号：US14540321
申请日：2014-11-13
Applicant: LG Chem, Ltd.
Inventor： Sang Wook Woo , Ji Heon Ryu , Eun Kyung Kim , Je Young Kim , Sang Jo An , Min Young Hong
IPC: H01M4/58 , H01M4/36 , C01B25/44 , H01M4/62 , H01M10/0525
CPC classification number: H01M4/5825 , C01B25/44 , H01M4/366 , H01M4/625 , H01M10/0525 , Y02T10/7011
Abstract: Provided is an anode active material including a transition metal-metaphosphate of Chemical Formula 1: M(PO3)2 where M is any one selected from the group consisting of titanium (Ti), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), ruthenium (Ru), palladium (Pd), and silver (Ag), or two or more elements thereof. Since the anode active material of the present invention is stable and has excellent conversion reactivity while including only transition metal and phosphate without using lithium in which the price thereof is continuously increased, the anode active material of the present invention may improve capacity characteristics.
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37.发明申请NEGATIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY, METHOD FOR PREPARING SAME, AND RECHARGEABLE LITHIUM BATTERY COMPRISING SAME 有权用于可充电锂电池的负极活性材料，其制备方法和包含其的可充电锂电池公开(公告)号：US20160372741A1
公开(公告)日：2016-12-22
申请号：US14898977
申请日：2015-07-23
Applicant: LG CHEM,LTD.
Inventor： Ju Ho Chung , Eun Kyung Kim , Sang Wook Woo , Sung Bin Park , Ye Ri Kim , Jun Hyuk Song
IPC: H01M4/36 , H01M4/485 , H01M4/131 , H01M4/1397 , H01M4/62 , H01M4/136 , H01M4/1391 , H01M10/0525 , H01M4/58
CPC classification number: H01M4/366 , H01M4/131 , H01M4/136 , H01M4/1391 , H01M4/1397 , H01M4/485 , H01M4/582 , H01M4/623 , H01M10/0525 , Y02T10/7011
Abstract: Disclosed are a negative electrode active material for lithium secondary batteries, a method of preparing the same and a lithium secondary battery including the same. More particularly, the negative electrode active material includes a core that includes a lithium titanium oxide represented by Formula 1 below and a coating layer that is located in a surface of the core and includes fluorine, and thus, a moisture content in the active material is decreased and adsorption of outside moisture is inhibited, thereby removing concern for side reaction occurrence due to moisture. In addition, loss of an SEI layer may be prevented due to a stable fluorine-containing coating layer formed on a surface of the active material. As a result, battery performance may be enhanced and stable expression thereof is possible: LixTiyO4, [Formula 1] wherein x and y are the same as defined in the present specification.
Abstract translation: 公开了一种锂二次电池用负极活性物质及其制备方法以及包含该二次电池的锂二次电池。 更具体地说，负极活性物质包括含有下述通式1所示的锂二氧化钛和位于芯的表面并含有氟的涂层的芯，因此活性物质中的水分含量为 外界水分的减少和吸附被抑制，从而消除了由于水分引起的副反应的担心。 此外，由于形成在活性物质表面上的稳定的含氟涂层，可以防止SEI层的损失。 因此，电池性能可能得到提高，其稳定的表达是可能的：€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ[Formula 1]€ƒ€ƒ€ƒ€ƒLix Ti y O 4，其中x和y与本说明书中定义的相同。
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公开(公告)号：US20140336975A1
公开(公告)日：2014-11-13
申请号：US14331510
申请日：2014-07-15
Applicant: LG Chem, Ltd.
Inventor： Eun Kyung Kim , Sun Young Shin , Je Young Kim , Sang Wook Woo
CPC classification number: G01N9/36 , G01N23/207 , G01N2223/633 , G01N2223/649
Abstract: Provided are methods of measuring electrode density and electrode porosity using X-ray diffraction.According to the methods of measuring electrode density and porosity of the present invention, electrode density and porosity may be efficiently measured by a non-destructive method using X-ray diffraction.
Abstract translation: 提供了使用X射线衍射测量电极密度和电极孔隙率的方法。 根据本发明的电极密度和孔隙率的测定方法，可以通过使用X射线衍射的非破坏性方法有效地测定电极密度和孔隙率。
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公开(公告)号：US11929487B2
公开(公告)日：2024-03-12
申请号：US16771601
申请日：2019-01-25
Applicant: LG CHEM, LTD.
Inventor： Oh Byong Chae , Sang Wook Woo , Je Young Kim , Yoon Ah Kang , Jun Hyuk Song
IPC: H01M4/134 , H01M4/02 , H01M4/133 , H01M4/1393 , H01M4/1395 , H01M4/36 , H01M4/66 , H01M10/0525 , H01M50/46
CPC classification number: H01M4/134 , H01M4/133 , H01M4/1393 , H01M4/1395 , H01M4/364 , H01M4/661 , H01M10/0525 , H01M50/46 , H01M2004/021 , H01M2004/027
Abstract: A method of preparing a negative electrode for a lithium secondary battery, which includes forming a negative electrode mixture layer including a negative electrode active material on a negative electrode current collector, disposing lithium metal powder on at least a part of the negative electrode mixture layer, pressing the negative electrode mixture layer on which the lithium metal powder is disposed, wetting the pressed negative electrode mixture layer with a first electrolyte solution, and drying the wet negative electrode mixture layer. A battery including the negative electrode of the present invention has enhanced rapid charge/discharge characteristics and enhanced lifespan characteristics.
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公开(公告)号：US11575117B2
公开(公告)日：2023-02-07
申请号：US16465900
申请日：2018-04-04
Applicant: LG CHEM, LTD.
Inventor： Oh Byong Chae , Jun Hyuk Song , Eun Kyung Kim , Yoon Ah Kang , Sang Wook Woo
IPC: H01M4/04 , H01M4/1391 , H01M4/131 , H01M4/485 , H01M10/0525 , H01M4/02
Abstract: A method for pre-lithiating a silicon oxide negative electrode for a secondary battery, specifically a method for pre-lithiation by immersing the silicon oxide negative electrode in an electrolytic solution for wetting, and by applying pressure while a lithium metal is in direct contact with the wetted silicon oxide negative electrode. The silicon oxide negative electrode for a secondary battery manufactured through pre-lithiation provided in the present disclosure has improved initial irreversibility, and a secondary battery manufactured using such a silicon oxide negative electrode for a secondary battery has excellent charge/discharge efficiency.
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