公开(公告)号：US10995216B2

公开(公告)日：2021-05-04

申请号：US16471510

申请日：2018-01-09

Applicant: LG CHEM, LTD.

Inventor： Hyungsik Jang ,  Pyeong Gi Kim ,  Se Hyun Kim ,  Dong Hyun Cho

IPC: C08L83/04 ,  C08K3/04 ,  C08K3/013 ,  C08K5/00 ,  C08K5/14

Abstract: In the present invention, it is possible to provide a silicone rubber composite which exhibits a conductivity equal to or higher than that using a high content of carbon black, by using a low content of carbon nanotubes as a conductive filler instead of a high content of carbon black to impart conductivity to insulating silicone rubber.

公开(公告)号：US10954388B2

公开(公告)日：2021-03-23

申请号：US16471510

申请日：2018-01-09

Applicant: LG CHEM, LTD.

Inventor： Hyungsik Jang ,  Pyeong Gi Kim ,  Se Hyun Kim ,  Dong Hyun Cho

IPC: C08L83/04 ,  C08K3/04 ,  C08K3/013 ,  C08K5/00 ,  C08K5/14

Abstract: In the present invention, it is possible to provide a silicone rubber composite which exhibits a conductivity equal to or higher than that using a high content of carbon black, by using a low content of carbon nanotubes as a conductive filler instead of a high content of carbon black to impart conductivity to insulating silicone rubber.

公开(公告)号：US10920077B2

公开(公告)日：2021-02-16

申请号：US16492560

申请日：2018-11-28

Applicant: LG CHEM, LTD.

Inventor： Hyung Sik Jang ,  Se Hyun Kim ,  Pyeong Gi Kim ,  Dong Hyun Cho

IPC: H01B1/24 ,  C08L83/04 ,  C08J3/22

Abstract: The present invention relates to a conductive silicone composition including conductive rubber compositions containing 100 parts by weight of liquid silicone and 0.5 to 2.5 parts by weight of carbon nanotubes, wherein the initial viscosity of the liquid silicone is 5,000 to 41,000 cP, the average viscosity of the conductive rubber compositions is 80,000 to 350,000 cP and the viscosity difference between the initial viscosity of the liquid silicone and the average viscosity of the conductive rubber compositions is 70,000 to 310,000 cP. The conductive silicone composition as described above is excellent in processibility when processed into a silicone composite material, and the volume resistance of a manufactured silicone composite material may be greatly improved.

公开(公告)号：US10857524B2

公开(公告)日：2020-12-08

申请号：US16080898

申请日：2017-03-21

Applicant: LG CHEM, LTD.

Inventor： Kyung Yeon Kang ,  Yelin Kim ,  Jihee Woo ,  Jung Keun Yoo ,  Dong Hyun Cho

IPC: C01B32/158 ,  B01J23/84 ,  C08J5/00 ,  C08K3/04 ,  C08K7/22 ,  H01M4/62 ,  H01M10/0525 ,  C01B32/162 ,  C01B32/17 ,  D01F9/127 ,  B01J23/847

Abstract: The carbon nanotubes according to the present invention can provide higher conductivity by allowing the BET and crystal size to satisfy the conditions expressed by formula 1 below, and consequently, can improve the conductivity of a carbon composite material containing the carbon nanotubes. Lc×[Specific surface area of CNT (cm2/g)]1/2>80  [Formula 1] wherein, Lc is crystal size measured by X-ray diffraction.

公开(公告)号：US10815126B2

公开(公告)日：2020-10-27

申请号：US16068015

申请日：2017-05-29

Applicant: LG CHEM, LTD.

Inventor： Jae Keun Yoon ,  Sung Jin Kim ,  Dong Hyun Cho

IPC: C01B32/174 ,  C01B32/158 ,  C01B32/168 ,  D01F9/08 ,  B82Y30/00 ,  B82Y40/00 ,  B01J2/06

Abstract: According to the present invention, a carbon nanotube structure can be manufactured by merely a simple process in which carbon nanotubes are pulverized and mixed in a dispersion solvent without a dispersant, followed by freezing, and then the dispersion solvent is removed. Such a method does not require a dispersant and a binder so that the manufactured carbon nanotube structure can be composed of only carbon nanotubes, and does not depend on the other additives to form the carbon nanotube structure so that there is little possibility of damage and contamination of the structure during the collection procedure of the structure after the formation of the structure.

公开(公告)号：US10541067B2

公开(公告)日：2020-01-21

申请号：US15747606

申请日：2016-10-17

Applicant: LG CHEM, LTD.

Inventor： Kyung Yeon Kang ,  Yelin Kim ,  Jihee Woo ,  Seungyong Lee ,  Hyungsik Jang ,  Dong Hyun Cho ,  Sang Hoon Choy

IPC: H01B1/24 ,  B30B11/24 ,  C04B35/626 ,  C04B35/83 ,  C01B32/00 ,  B30B11/22 ,  C01B32/991 ,  B01F7/08 ,  C04B35/52

Abstract: The carbon nanotube pellets according to the present invention are produced by using only a small amount of solvent and have increased apparent density. The present invention can improve the problems of the change of the content generated by scattering of powders and safety issues by using carbon nanotubes in the form of pellet rather than carbon nanotubes in the form of powder in composite materials. And since the density of the pellet form is higher than that of the powder form, transport, transfer and improvement become easier. Therefore, it can be more effectively applied to the manufacturing of composite materials.

公开(公告)号：US20180198129A1

公开(公告)日：2018-07-12

申请号：US15741676

申请日：2016-10-28

Applicant: LG Chem, Ltd.

Inventor： Ye Lin Kim ,  Jong Heon Seol ,  Kyung Yeon Kang ,  Sang Hoon Choy ,  Ji Hee Woo ,  Dong Hyun Cho

IPC: H01M4/62 ,  H01M10/052

CPC classification number: H01M4/625 ,  H01M4/0404 ,  H01M4/139 ,  H01M4/622 ,  H01M10/052

Abstract: The present invention provides: a conductive material dispersed liquid containing a conductive material, a dispersant, and a dispersion medium, wherein the conductive material comprises bundle-type carbon nanotubes having a bulk density in a range of 10-50 kg/m3 and a conductivity satisfying the conditions of Equation 1 below, thereby exhibiting excellent dispersibility and conductivity; and a lithium secondary battery, which is manufactured using the conductive material dispersed liquid and thus can exhibit excellent battery functions, especially, excellent output characteristics at low temperatures: −X≤10 log R≤−0.6X  [Equation 1] (in Equation 1 above, X is a bulk density of the carbon nanotubes, and R is a powder resistance of the carbon nanotubes under a pressure of 10 to 65 MPa.).

公开(公告)号：US11352260B2

公开(公告)日：2022-06-07

申请号：US16318973

申请日：2018-03-16

Applicant: LG CHEM, LTD.

Inventor： Sung Jin Kim ,  Jae Keun Yoon ,  Dong Hyun Cho ,  Hyun Joon Kang ,  Byung Yul Choi ,  Duk Ki Kim ,  Hyun Woo Park ,  Hyo Sang You

IPC: C01B32/162 ,  H01B1/04 ,  B01J23/847

Abstract: The present invention relates to a bundle-type carbon nanotube which has a bulk density of 25 to 45 kg/m3, a ratio of the bulk density to a production yield of 1 to 3, and a ratio of a tap density to the bulk density of 1.3 to 2.0, and a method for preparing the same.

公开(公告)号：US11267710B2

公开(公告)日：2022-03-08

申请号：US16331796

申请日：2018-01-05

Applicant: LG CHEM, LTD.

Inventor： Jae Keun Yoon ,  Dong Hyun Cho ,  Sung Jin Kim ,  Kyung Yeon Kang

IPC: C01B32/174 ,  C01B32/176 ,  C01B32/158

Abstract: In the present invention, by dry pulverizing carbon nanotubes to control wettability index of the carbon nanotubes, the maximum concentration of the carbon nanotubes that can be added to the dispersion solvent can be increased and the workability of the carbon nanotube dispersion can be improved. Further, from this, it is possible to more easily predict the maximum concentration of the carbon nanotubes that can be added to the dispersion solvent.

公开(公告)号：US11198780B2

公开(公告)日：2021-12-14

申请号：US15763674

申请日：2016-10-17

Applicant: LG CHEM, LTD.

Inventor： Pyeong-Gi Kim ,  Seokwon Kim ,  Se Hyun Kim ,  Tae Hyung Kim ,  Suk Jo Choi ,  Dong Hyun Cho

IPC: C08L25/06 ,  B29C70/88 ,  B29C70/02 ,  C08L55/02 ,  C08K3/04 ,  C08K5/00 ,  B29K55/02 ,  B29K105/16 ,  B29K507/04

Abstract: The present invention relates to a carbon composite, which comprises a polymer resin and a carbon material having specific conditions, thereby controlling a dielectric constant. According to the present invention, the carbon composite and a method for controlling a dielectric constant by using the same can be variously applied to a circuit, an electronic material and the like by establishing a correlation between the specific surface area of the carbon material and the dielectric property of the carbon composite.