公开(公告)号：US20190010057A1

公开(公告)日：2019-01-10

申请号：US15748747

申请日：2017-01-13

Applicant: LG Chem, Ltd.

Inventor： Sun Young Shin ,  Su Min Lee ,  Oh Byong Chae ,  Eun Kyung Kim

IPC: C01B32/182 ,  H01M4/587 ,  H01M10/0525 ,  C01D15/08 ,  C01D7/00

Abstract: The present invention relates to a negative electrode active material for a lithium secondary battery, which comprises graphite having an alkali carbonate layer formed on a surface thereof, wherein the graphite has an ID/IG ratio of 0.05 to 0.3 in Raman spectroscopy, and a method of preparing the same, wherein, since the negative electrode active material for a lithium secondary battery of the present invention includes the graphite having an alkali carbonate layer formed on the surface thereof, the alkali carbonate layer contributes to the formation of a stable solid electrolyte interface (SEI) to reduce a side reaction with an electrolyte solution including propylene carbonate. Thus, since low-temperature performance and initial efficiency of the lithium secondary battery may be improved, the negative electrode active material for a lithium secondary battery of the present invention is suitable for the preparation of the lithium secondary battery.

公开(公告)号：US09972845B2

公开(公告)日：2018-05-15

申请号：US15108028

申请日：2015-06-10

Applicant: LG Chem, Ltd.

Inventor： Su Yeon Lee ,  Sun Young Shin ,  Su Min Lee ,  Eun Kyung Kim

IPC: H01M4/587 ,  H01M4/1393 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/02

CPC classification number: H01M4/587 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/366 ,  H01M4/625 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: The present invention relates to a negative electrode active material, and a method of manufacturing the same. The negative electrode active material includes a low crystalline artificial graphite and an amorphous carbon coating layer formed on the low crystalline artificial graphite, wherein an interplanar spacing d002 of (002) plane is in a range of greater than 0.338 nm to less than 0.3396 nm, as measured by X-ray diffraction (XRD). When the negative electrode active material according to one exemplary embodiment of the present invention is used for lithium secondary batteries, a more stable SEI layer can be formed during reacting with an electrolyte solution, thereby improving initial efficiency and reversible capacity of the lithium secondary battery.

公开(公告)号：US20160322636A1

公开(公告)日：2016-11-03

申请号：US15108028

申请日：2015-06-10

Applicant: LG CHEM, LTD.

Inventor： Su Yeon Lee ,  Sun Young Shin ,  Su Min Lee ,  Eun Kyung Kim

IPC: H01M4/587 ,  H01M10/0525 ,  H01M4/1393 ,  H01M4/36 ,  H01M4/62

CPC classification number: H01M4/587 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/366 ,  H01M4/625 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: The present invention relates to a negative electrode active material, and a method of manufacturing the same. The negative electrode active material includes a low crystalline artificial graphite and an amorphous carbon coating layer formed on the low crystalline artificial graphite, wherein an interplanar spacing d002 of (002) plane is in a range of greater than 0.338 nm to less than 0.3396 nm, as measured by X-ray diffraction (XRD). When the negative electrode active material according to one exemplary embodiment of the present invention is used for lithium secondary batteries, a more stable SEI layer can be formed during reacting with an electrolyte solution, thereby improving initial efficiency and reversible capacity of the lithium secondary battery.

Abstract translation: 负极活性物质及其制造方法技术领域本发明涉及负极活性物质及其制造方法。 负极活性物质包含在低结晶人造石墨上形成的低结晶人造石墨和无定形碳涂层，其中（002）面的面间距d002在大于0.338nm〜小于0.3396nm的范围内， 如通过X射线衍射（XRD）测量的。 当根据本发明的一个示例性实施方案的负极活性材料用于锂二次电池时，可以在与电解质溶液反应期间形成更稳定的SEI层，从而提高锂二次电池的初始效率和可逆容量。

公开(公告)号：US12009515B2

公开(公告)日：2024-06-11

申请号：US16764641

申请日：2018-11-22

Applicant: LG CHEM, LTD.

Inventor： Yong Ju Lee ,  Rae Hwan Jo ,  Su Min Lee ,  Dong Hyuk Kim ,  Se Mi Park

IPC: H01M4/485 ,  C01B33/22 ,  C01B33/32 ,  H01M4/02 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M4/485 ,  C01B33/22 ,  C01B33/32 ,  H01M4/366 ,  H01M4/625 ,  H01M10/0525 ,  C01P2002/02 ,  C01P2004/80 ,  C01P2006/40 ,  H01M2004/027

Abstract: A negative electrode active material for a lithium secondary battery, which includes a silicon-based particle represented by M-SiOx, wherein M is Li, Mg, Ca, Al, or Ti, and 0≤x

公开(公告)号：US11552289B2

公开(公告)日：2023-01-10

申请号：US15746322

申请日：2017-05-19

Applicant: LG Chem, Ltd.

Inventor： Su Min Lee ,  Sun Young Shin ,  Eun Kyung Kim ,  Su Yeon Lee ,  Lilin Piao

IPC: H01M4/36 ,  H01M4/133 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/1393 ,  H01M4/02

Abstract: The present invention relates to a composite negative electrode material for a secondary battery, and a negative electrode and a lithium secondary battery which include the same, and particularly to a composite negative electrode material for a secondary battery, which includes a graphene sheet, and two or more coating layers formed on both sides of the graphene sheet, wherein the two or more coating layers include at least one polymer coating layer and at least one pitch coating layer, and the graphene sheet and the two or more coating layers are included in a weight ratio of greater than 1:greater than 0.01 to less than 0.1, and a negative electrode and a lithium secondary battery which include the same.

公开(公告)号：US11515515B2

公开(公告)日：2022-11-29

申请号：US16754388

申请日：2018-10-19

Applicant: LG CHEM, LTD.

Inventor： Il Geun Oh ,  Eun Kyung Kim ,  Yong Ju Lee ,  Rae Hwan Jo ,  Su Min Lee ,  Jung Hyun Choi ,  Dong Hyuk Kim ,  Se Mi Park

IPC: H01M4/04 ,  H01M4/131 ,  H01M4/58 ,  H01M4/134 ,  H01M10/0525 ,  C01B33/32 ,  H01M4/1395 ,  H01M4/02

Abstract: The present invention relates to a method of preparing a negative electrode active material which includes forming a mixture by mixing Li2O and SiOx(0

公开(公告)号：US11495797B2

公开(公告)日：2022-11-08

申请号：US16761662

申请日：2018-11-06

Applicant: LG CHEM, LTD.

Inventor： Il Geun Oh ,  Eun Kyung Kim ,  Yong Ju Lee ,  Rae Hwan Jo ,  Su Min Lee ,  Jung Hyun Choi

IPC: H01M4/587 ,  H01M4/04 ,  H01M4/38 ,  H01M4/02

Abstract: A negative electrode active material including a silicon-carbon-based particle, the silicon-carbon-based particle having a SiCx matrix and boron doped in the SiCx matrix, wherein x of the SiCx matrix is 0.3 or more and less than 0.6.

公开(公告)号：US11114670B2

公开(公告)日：2021-09-07

申请号：US16304998

申请日：2017-10-26

Applicant: LG CHEM, LTD.

Inventor： Su Min Lee ,  Sun Young Shin ,  Su Yeon Lee ,  Eun Kyung Kim

IPC: H01M4/66 ,  H01M4/02

Abstract: A negative electrode according to one embodiment of the present invention comprises a current collector and a negative electrode active material layer disposed on the current collector, wherein the negative electrode active material layer includes a first particle and a second particle, the first particle includes a first core including artificial graphite; and a first shell disposed on the first core, said first shell including an oxide of the artificial graphite, wherein a sphericity of the first particle measured through a particle shape analyzer is from 0.94 to 0.98, the second particle is artificial graphite having sphericity measured through the particle shape analyzer of 0.70 to 0.92, and a weight ratio of the first particle and the second particle is from 1:1 to 1:9.

公开(公告)号：US20190177509A1

公开(公告)日：2019-06-13

申请号：US16274652

申请日：2019-02-13

Applicant: LG CHEM, LTD.

Inventor： Yeon Sik Choi ,  Su Min Lee ,  Chang Hun Yun ,  Gi Dae Choi

IPC: C08K7/06 ,  C08K5/05 ,  C08K5/09 ,  C08K7/24 ,  B29B9/16 ,  C08K5/10 ,  C08J7/06 ,  C08K5/22 ,  C08K5/20

Abstract: Disclosed are methods for combining a thermoplastic polymer with a carbon nanomaterial. More particularly, A method of preparing a thermoplastic polymer combined with a carbon nanomaterial includes combining the carbon nanomaterial with a pyrene derivative by stirring 1 to 40 wt % of a carbon nanomaterial, 1 to 40 wt % of a polycyclic aromatic hydrocarbon derivative, and 20 to 98 wt % of a solvent with a mechanical mixer. According to the present invention, the resulting materials exhibit excellent tensile strength, tensile modulus, electromagnetic shielding effects and anti-static effects, and the like.

公开(公告)号：US10266675B2

公开(公告)日：2019-04-23

申请号：US14419423

申请日：2014-08-28

Applicant: LG CHEM, LTD.

Inventor： Yeon Sik Choi ,  Su Min Lee ,  Chang Hun Yun ,  Gi Dae Choi

IPC: C08K3/04 ,  C08K5/01 ,  C08K7/06 ,  C08K9/04 ,  C08J3/215 ,  C08J7/06 ,  C08J3/22 ,  C08L101/00 ,  C08L77/00 ,  B82B1/00 ,  B82B3/00 ,  C08K5/09 ,  C08K7/24 ,  B29B9/16 ,  C08K5/05 ,  C08K5/10 ,  C08K5/20 ,  C08K5/22 ,  C08L77/02 ,  C08L77/06

Abstract: Disclosed are a thermoplastic polymer combined with a carbon nanomaterial and a method of preparing the same. More particularly, a thermoplastic polymer combined with carbon nanomaterial, comprising 0.1 to 15 wt % of a carbon nanomaterial, 0.025 to 30 wt % of a polycyclic aromatic hydrocarbon derivative, and 55 to 99.875 wt % of a thermoplastic polymer, wherein the carbon nanomaterial and the polycyclic aromatic hydrocarbon derivative combine through π-π interaction, and the polycyclic aromatic hydrocarbon derivative covalently combines with the thermoplastic polymer, is disclosed. The thermoplastic polymer combined with the carbon nanomaterial and the method of preparing the same, according to the present invention, exhibit excellent tensile strength, tensile modulus, electromagnetic shielding effects and anti-static effects, and the like.