公开(公告)号：US11192085B2

公开(公告)日：2021-12-07

申请号：US17005540

申请日：2020-08-28

Applicant: LG Chem, Ltd. ,  Seoul National University R&DB Foundation

Inventor： Mi Jin Lee ,  Byeong-Hyeok Sohn ,  Seung Yong Chae ,  Won Jong Kwon ,  Kwon Nam Sohn

IPC: B01J19/00 ,  C01B32/19 ,  C08F283/06 ,  C08F293/00

Abstract: The present invention relates to a method for preparing graphene using a novel block copolymer. The present invention has features that, by using the block copolymer to mediate graphene that is hydrophobic and a solvent of a feed solution that is hydrophilic, the exfoliation efficiency of graphene as well as the dispersion stability thereof can be increased during high-pressure homogenization.

公开(公告)号：US11066304B2

公开(公告)日：2021-07-20

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：US10435571B2

公开(公告)日：2019-10-08

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: C01B32/158 ,  C01B32/159 ,  B82Y40/00 ,  B82Y30/00 ,  C09D7/65 ,  C09K5/14 ,  C09D5/24 ,  C09D11/52 ,  H01B1/24 ,  H01M4/62 ,  C01B32/174 ,  C01B32/176 ,  C09D7/40 ,  C08K3/04

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.

公开(公告)号：US20190169032A1

公开(公告)日：2019-06-06

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

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：US20170305747A1

公开(公告)日：2017-10-26

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

CPC classification number: C01B32/19 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/225 ,  C01B2204/32

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：US20170233256A1

公开(公告)日：2017-08-17

申请号：US15518652

申请日：2015-12-11

Applicant: LG Chem, Ltd. ,  Seoul National University R&DB Foundation

Inventor： Mi Jin Lee ,  Byeong-Hyeok Sohn ,  Seung Yong Chae ,  Won Jong Kwon ,  Kwon Nam Sohn

IPC: C01B31/02 ,  C08F283/06 ,  C08F293/00 ,  B01J19/00 ,  C08F12/22

CPC classification number: B01J19/0093 ,  B01J2219/0086 ,  B01J2219/00891 ,  C01B32/19 ,  C08F283/06 ,  C08F293/005 ,  C08F2438/03

Abstract: The present invention relates to a method for preparing graphene using a novel block copolymer. The present invention has features that, by using the block copolymer to mediate graphene that is hydrophobic and a solvent of a feed solution that is hydrophilic, the exfoliation efficiency of graphene as well as the dispersion stability thereof can be increased during high-pressure homogenization.