公开(公告)号：US20170158512A1

公开(公告)日：2017-06-08

申请号：US15039281

申请日：2014-12-22

Applicant: LG Chem, Ltd.

Inventor： Kwon Nam Sohn ,  Kwang Hyun Yoo ,  Won Jong Kwon ,  Kil Sun Lee ,  Seung Bo Yang ,  In Young Kim ,  Mi Jin Lee ,  Jin Yeong Lee

IPC: C09K5/14 ,  C09D5/24 ,  C09D5/32 ,  H05K9/00 ,  C09D11/52 ,  H01M4/62 ,  H01B1/04 ,  C09D1/00 ,  C09D7/00

CPC classification number: C09D7/20 ,  C01B32/184 ,  C01B32/19 ,  C01B2204/04 ,  C01B2204/32 ,  C09D1/00 ,  C09D5/24 ,  C09D5/32 ,  C09D11/52 ,  C09K5/14 ,  H01B1/04 ,  H01M4/625 ,  H05K9/0092

Abstract: Disclosed herein are a preparation method of graphene, capable of easily preparing a graphene flake having a smaller thickness and a large area, and a dispersed composition of graphene obtained using the same. The preparation method of graphene includes applying a physical force to dispersion of a carbon-based material including graphite or a derivative thereof, and a dispersant, wherein the dispersant includes a mixture of plural kinds of polyaromatic hydrocarbon oxides, containing the polyaromatic hydrocarbon oxides having a molecular weight of 300 to 1000 in a content of 60% by weight or more, and the graphite or the derivative thereof is formed into a graphene flake having a thickness in nanoscale under application of a physical force.

公开(公告)号：US10981790B2

公开(公告)日：2021-04-20

申请号：US16303427

申请日：2017-11-20

Applicant: LG Chem, Ltd.

Inventor： Mi Jin Lee ,  Won Jong Kwon ,  Gwang Hoon Jun ,  Ji Yeon Byeon ,  Yu Ra Lee

IPC: C01B32/194 ,  C09C3/08 ,  C09C1/44

Abstract: The present invention relates to a method for preparing a functionalized graphene. The method for preparing a functionalized graphene according to the present invention can functionalize graphene by a simple method and does not use any other substance other than graphene and a salt containing a double bond, thereby enabling functionalization of graphene while exhibiting characteristics inherent to graphene.

公开(公告)号：US20200290878A1

公开(公告)日：2020-09-17

申请号：US16496991

申请日：2018-11-23

Applicant: LG Chem, Ltd.

Inventor： Won Jong Kwon ,  Yong-O Im ,  Mi Jin Lee ,  Gwang Hoon Jun

IPC: C01B32/194 ,  C01B32/184

Abstract: The present invention provides graphene in which a polymer having a functional group capable of improving the dispersibility of graphene is bonded to the surface of the graphene. The present invention also provides a method for preparing the graphene described above.

公开(公告)号：US20190271100A1

公开(公告)日：2019-09-05

申请号：US16320308

申请日：2018-01-24

Applicant: LG Chem, Ltd.

Inventor： Eu Gene Oh ,  Ji Eun Kim ,  Mi Jin Lee ,  Jae Hong Lee ,  Ju Han Kim ,  Won Jong Kwon ,  Won Jae Lee ,  Jin Kyu Lee

IPC: D01F9/127 ,  D01D10/02 ,  C01B32/178 ,  C01B32/162

Abstract: The present invention relates to a carbon nanotube fiber and methods for preparing the same. In one embodiment, a method for preparing a carbon nanotube fiber comprises reacting a carbon source in the presence of a catalyst and a catalytic activator to form carbon nanotube aggregates, contacting the carbon nanotube aggregates with graphene oxide, and forming the carbon nanotube aggregates in contact with the graphene oxide into a carbon nanotube fiber.

公开(公告)号：US10472242B2

公开(公告)日：2019-11-12

申请号：US15518311

申请日：2015-12-10

Applicant: LG Chem, Ltd.

Inventor： Seung Bo Yang ,  Kwon Nam Sohn ,  Won Jong Kwon ,  Se Ho Park ,  Mi Jin Lee

IPC: C01B32/19 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/225

Abstract: The present invention relates to a method for preparing graphene which comprises subjecting expanded graphite to high speed homogenization to prepare a feed solution and then subjecting the same to high pressure homogenization, thereby increasing the degree of dispersion of expanded graphite in the feed solution and so improving the efficiency of high pressure homogenization. Therefore, the present method has features that the efficiency of graphene preparation is excellent and the size of graphene to be prepared is uniform, compared with a conventional process.

公开(公告)号：US10131803B2

公开(公告)日：2018-11-20

申请号：US15039281

申请日：2014-12-22

Applicant: LG Chem, Ltd.

Inventor： Kwon Nam Sohn ,  Kwang Hyun Yoo ,  Won Jong Kwon ,  Kil Sun Lee ,  Seung Bo Yang ,  In Young Kim ,  Mi Jin Lee ,  Jin Yeong Lee

IPC: C01B32/19 ,  B82Y40/00 ,  C09D7/20 ,  C09D1/00 ,  C09D5/24 ,  C09D5/32 ,  C09D11/52 ,  C09K5/14 ,  H01B1/04 ,  H01M4/62 ,  H05K9/00 ,  C01B32/184

Abstract: Disclosed herein are a preparation method of graphene, capable of easily preparing a graphene flake having a smaller thickness and a large area, and a dispersed composition of graphene obtained using the same. The preparation method of graphene includes applying a physical force to dispersion of a carbon-based material including graphite or a derivative thereof, and a dispersant, wherein the dispersant includes a mixture of plural kinds of polyaromatic hydrocarbon oxides, containing the polyaromatic hydrocarbon oxides having a molecular weight of 300 to 1000 in a content of 60% by weight or more, and the graphite or the derivative thereof is formed into a graphene flake having a thickness in nanoscale under application of a physical force.

公开(公告)号：US20170036914A1

公开(公告)日：2017-02-09

申请号：US15305242

申请日：2015-05-15

Applicant: LG Chem, Ltd.

Inventor： Kwon Nam Sohn ,  Kil Sun Lee ,  Won Jong Kwon ,  Su Jin Park ,  Byung Hun Oh ,  Eui Yong Hwang ,  Seung Bo Yang ,  Kwang Hyun Yoo ,  Mi Jin Lee

IPC: C01B31/02 ,  C09D5/24 ,  C09D11/52 ,  H01M4/62 ,  C07C27/10 ,  C10C3/04 ,  H01B1/24 ,  H05K9/00 ,  C09K5/14 ,  C09D7/12

CPC classification number: C09D7/65 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/174 ,  C01B32/176 ,  C01B2202/34 ,  C08K3/041 ,  C09D5/24 ,  C09D7/70 ,  C09D11/52 ,  C09K5/14 ,  H01B1/24 ,  H01M4/625 ,  Y10S977/742 ,  Y10S977/842 ,  Y10S977/932

Abstract: The present invention relates to a method for preparing carbon nanotubes which are capable of more effectively preparing carbon nanotubes having a uniform and fine size, and a dispersion composition of carbon nanotubes obtained using the same. The method for preparing carbon nanotube comprises the steps of: forming a dispersion comprising carbon nanotube bundles, a dispersant and a solvent; and enabling the dispersion to consecutively pass through a high pressure homogenizer, wherein the dispersant is a mixture of plural kinds of polyaromatic hydrocarbon oxides, and the carbon nanotube bundles are pulverized or disentangled while passing through a microchannel of the high pressure homogenizer under a shear force to form carbon nanotubes.

Abstract translation: 本发明涉及能够更有效地制备具有均匀和细小尺寸的碳纳米管的碳纳米管制备方法和使用其制备的碳纳米管的分散组合物。 制备碳纳米管的方法包括以下步骤：形成包含碳纳米管束，分散剂和溶剂的分散体; 并使分散体连续通过高压均化器，其中分散剂是多种多芳族烃氧化物的混合物，并且在剪切力通过高压均化器的微通道的同时将碳纳米管束粉碎或解开 以形成碳纳米管。

公开(公告)号：US11136711B2

公开(公告)日：2021-10-05

申请号：US16320308

申请日：2018-01-24

Applicant: LG Chem, Ltd.

Inventor： Eu Gene Oh ,  Ji Eun Kim ,  Mi Jin Lee ,  Jae Hong Lee ,  Ju Han Kim ,  Won Jong Kwon ,  Won Jae Lee ,  Jin Kyu Lee

IPC: D01F11/12 ,  D01F9/12 ,  C01B32/198 ,  D06M11/74 ,  C01B32/162 ,  C01B32/178 ,  D01D10/02 ,  D06M23/08 ,  C01B32/168 ,  B82Y30/00 ,  B82Y40/00

Abstract: The present invention relates to a carbon nanotube fiber and methods for preparing the same. In one embodiment, a method for preparing a carbon nanotube fiber comprises reacting a carbon source in the presence of a catalyst and a catalytic activator to form carbon nanotube aggregates, contacting the carbon nanotube aggregates with graphene oxide, and forming the carbon nanotube aggregates in contact with the graphene oxide into a carbon nanotube fiber.

公开(公告)号：US10033044B2

公开(公告)日：2018-07-24

申请号：US15038857

申请日：2014-12-22

Applicant: LG Chem, Ltd.

Inventor： Kil Sun Lee ,  Kwon Nam Sohn ,  Won Jong Kwon ,  Seung Bo Yang ,  In Young Kim ,  Kwang Hyun Yoo ,  Mi Jin Lee ,  Jin Yeong Lee

IPC: H01M4/62 ,  H01B1/24 ,  H01M4/04 ,  H01M4/139 ,  H01M10/0525 ,  H01M10/052

Abstract: The present invention relates to a conducting material composition capable of forming an electrode in which at least two kinds of carbon based materials are contained in a uniformly dispersed state to enable a battery such as a lithium rechargeable battery having more improved electrical and lifetime characteristics to be provided, and a slurry composition for forming an electrode of a lithium rechargeable battery and a lithium rechargeable battery using the same. The conducting material composition contains: at least two kinds of conductive carbon-based materials selected from the group consisting of carbon nano tube, graphene, and carbon black; and a dispersant containing a plurality kinds of poly aromatic hydrocarbon oxides, wherein the dispersant contains poly aromatic hydrocarbon oxides having a molecular weight of 300 to 1000 at a content of 60 wt.% or more.

公开(公告)号：US20170217775A1

公开(公告)日：2017-08-03

申请号：US15518525

申请日：2015-12-11

Applicant: LG Chem, Ltd.

Inventor： Kwon Nam Sohn ,  Mi Jin Lee ,  Won Jong Kwon ,  Se Ho Park ,  Kwang Hyun Yoo

IPC: C01B31/04

CPC classification number: C01B31/043 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/192 ,  C01B32/23 ,  C01B2204/04 ,  C01B2204/32 ,  C01P2002/82 ,  C01P2004/03 ,  C01P2004/04 ,  Y10S977/734 ,  Y10S977/842

Abstract: The present invention relates to a partially oxidized graphene and a method for preparing the same. Since the partially oxidized graphene is prepared by subjecting the partially oxidized graphite to a high pressure homogenization, the exfoliation efficiency is excellent, the inherent characteristics of graphene are maintained even without using a reduction step after exfoliation, and the dispersibility thereof in organic solvents is excellent, and thus the invention can be applied to various fields.