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：US10647579B2

公开(公告)日：2020-05-12

申请号：US15746945

申请日：2016-10-17

Applicant: LG CHEM, LTD.

Inventor： Kyung Yeon Kang ,  Jihee Woo ,  Seungyong Lee ,  Hyungsik Jang ,  Dong Hyun Cho

IPC: C01B32/174 ,  B30B11/24 ,  B01F7/08 ,  B30B11/22 ,  C01B32/168

Abstract: The method for producing carbon nanotube pellets according to the present invention can reduce the particle size of the carbon nanotubes contained in the pellet by a repetitive extrusion process to produce pellets having improved dispersion characteristics in a solvent. 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. 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：US09005564B2

公开(公告)日：2015-04-14

申请号：US14357955

申请日：2013-01-09

Applicant: LG Chem, Ltd.

Inventor： Kyung Yeon Kang ,  Jin Do Kim ,  Sung Jin Kim ,  Jae Keun Yoon

IPC: C01B31/02 ,  B01J23/755 ,  B01J23/881 ,  B01J23/883 ,  B01J37/02 ,  B82Y40/00

CPC classification number: C01B31/0233 ,  B01J23/881 ,  B01J23/883 ,  B01J31/04 ,  B01J37/0203 ,  B01J37/0236 ,  B01J37/08 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/15 ,  C01B32/162 ,  C01B2202/20 ,  C01B2202/36 ,  Y10S977/742 ,  Y10S977/843

Abstract: Disclosed are carbon nanotubes and a method for manufacturing the same. Advantageously, the method provides a high yield of potato or sphere-shaped non-bundled carbon nanotubes having a bulk density of 80 to 250 kg/m3, an ellipticity of 0.9 to 1.0 and a particle diameter distribution (Dcnt) of 0.5 to 1.0 using a two-component carbon nanotube catalyst comprising a catalyst component and an active component.

Abstract translation: 公开了碳纳米管及其制造方法。 有利地，该方法提供了高产量的马铃薯或球形非束状碳纳米管，其堆积密度为80至250kg / m 3，椭圆率为0.9至1.0，粒径分布（Dcnt）为0.5至1.0，使用 包含催化剂组分和活性组分的双组分碳纳米管催化剂。

公开(公告)号：US11453592B2

公开(公告)日：2022-09-27

申请号：US16631643

申请日：2019-01-21

Applicant: LG CHEM, LTD.

Inventor： Kyung Yeon Kang ,  Seung Yong Lee ,  Seok Won Kim ,  Hyun Joon Kang

IPC: C01B32/174 ,  B29C48/02 ,  B29C48/00 ,  B29C48/04 ,  B29K105/00 ,  B82Y30/00 ,  B82Y40/00

Abstract: The present invention relates to a method for preparing a carbon nanotube dispersion, the method including mixing a dispersion solution including a dispersion solvent and a dispersant with carbon nanotubes to prepare carbon nanotube paste, extruding the paste to obtain solid carbon nanotubes, and introducing a second solvent to the solid carbon nanotubes, and homogenizing the carbon nanotubes, wherein the weight ratio of the dispersion solution and the carbon nanotubes is 1:1 to 9:1. According to the present invention, the mixing of a dispersant and carbon nanotubes is increased and the particle size is controlled by a wet method, so that a carbon nanotube dispersion having a viscosity controlled to a low level, excellent resistance properties, and a high concentration, may be provided.

公开(公告)号：US09434617B2

公开(公告)日：2016-09-06

申请号：US14618729

申请日：2015-02-10

Applicant: LG CHEM, LTD.

Inventor： Kyung Yeon Kang ,  Jin Do Kim ,  Sung Jin Kim ,  Jae Keun Yoon

IPC: C01B31/02 ,  B01J23/881 ,  B01J21/04 ,  B01J23/755 ,  B01J23/883 ,  B01J37/02 ,  B01J37/08 ,  B01J31/04 ,  B82Y40/00 ,  B82Y30/00

CPC classification number: C01B31/0233 ,  B01J23/881 ,  B01J23/883 ,  B01J31/04 ,  B01J37/0203 ,  B01J37/0236 ,  B01J37/08 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/15 ,  C01B32/162 ,  C01B2202/20 ,  C01B2202/36 ,  Y10S977/742 ,  Y10S977/843

Abstract: Disclosed are carbon nanotubes and a method for manufacturing the same. Advantageously, the method provides a high yield of potato or sphere-shaped non-bundled carbon nanotubes having a bulk density of 80 to 250 kg/m3, an ellipticity of 0.9 to 1.0 and a particle diameter distribution (Dcnt) of 0.5 to 1.0 using a two-component carbon nanotube catalyst comprising a catalyst component and an active component.

公开(公告)号：US20140328744A1

公开(公告)日：2014-11-06

申请号：US14357955

申请日：2013-01-09

Applicant: LG CHEM, LTD.

Inventor： Kyung Yeon Kang ,  Jin Do Kim ,  Sung Jin Kim ,  Jae Keun Yoon

IPC: C01B31/02

CPC classification number: C01B31/0233 ,  B01J23/881 ,  B01J23/883 ,  B01J31/04 ,  B01J37/0203 ,  B01J37/0236 ,  B01J37/08 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/15 ,  C01B32/162 ,  C01B2202/20 ,  C01B2202/36 ,  Y10S977/742 ,  Y10S977/843

Abstract: Disclosed are carbon nanotubes and a method for manufacturing the same. Advantageously, the method provides a high yield of potato or sphere-shaped non-bundled carbon nanotubes having a bulk density of 80 to 250 kg/m3, an ellipticity of 0.9 to 1.0 and a particle diameter distribution (Dcnt) of 0.5 to 1.0 using a two-component carbon nanotube catalyst comprising a catalyst component and an active component.

Abstract translation: 公开了碳纳米管及其制造方法。 有利地，该方法提供了高产量的马铃薯或球形非束状碳纳米管，其堆积密度为80至250kg / m 3，椭圆率为0.9至1.0，粒径分布（Dcnt）为0.5至1.0，使用 包含催化剂组分和活性组分的双组分碳纳米管催化剂。

公开(公告)号：US11059009B2

公开(公告)日：2021-07-13

申请号：US15745790

申请日：2016-10-17

Applicant: LG CHEM, LTD.

Inventor： Kyung Yeon Kang ,  Jihee Woo ,  Seungyong Lee ,  Hyungsik Jang ,  Dong Hyun Cho

IPC: B01J2/20 ,  B01F7/08 ,  C01B32/174 ,  B30B11/22 ,  B30B11/24 ,  B01F7/02 ,  B01F15/02 ,  C01B32/168 ,  B82Y30/00 ,  B82Y40/00

Abstract: The apparatus for manufacturing carbon nanotube pellets according to the present invention provides carbon nanotube pellets with increased apparent density by using only a small amount of solvent. The carbon nanotube pellets produced by the apparatus according to the present invention can improve various problems generated by scattering of powders. And since the density of the pellet form is high, transport, transfer and improvement become easier. Therefore, it can be more effectively applied to the manufacturing of composite materials.

公开(公告)号：US11050061B2

公开(公告)日：2021-06-29

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 ,  H01M4/139 ,  H01M4/04

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：US20200172401A1

公开(公告)日：2020-06-04

申请号：US16631643

申请日：2019-01-21

Applicant: LG CHEM, LTD.

Inventor： Kyung Yeon Kang ,  Seung Yong Lee ,  Seok Won Kim ,  Hyun Joon Kang

IPC: C01B32/174 ,  B29C48/00 ,  B29C48/04

Abstract: The present invention relates to a method for preparing a carbon nanotube dispersion, the method including mixing a dispersion solution including a dispersion solvent and a dispersant with carbon nanotubes to prepare carbon nanotube paste, extruding the paste to obtain solid carbon nanotubes, and introducing a second solvent to the solid carbon nanotubes, and homogenizing the carbon nanotubes, wherein the weight ratio of the dispersion solution and the carbon nanotubes is 1:1 to 9:1. According to the present invention, the mixing of a dispersant and carbon nanotubes is increased and the particle size is controlled by a wet method, so that a carbon nanotube dispersion having a viscosity controlled to a low level, excellent resistance properties, and a high concentration, may be provided.

公开(公告)号：US10665890B2

公开(公告)日：2020-05-26

申请号：US15578177

申请日：2016-09-09

Applicant: LG CHEM, LTD.

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

IPC: H01M10/052 ,  H01M4/13 ,  H01M4/62 ,  H01M4/583 ,  C01B32/17 ,  C01B32/162 ,  C01B32/158 ,  H01M2/10

Abstract: The present invention provides a conductive material for a secondary battery, and a secondary battery containing the same, the conductive material comprising carbon nanotubes, having a secondary structure in which carbon nanotube units having a diameter of 20-150 nm are entangled, having a ratio of true density to bulk density (TD/BD) of 30-120, having a metal content of 50 ppm or less, and having both excellent dispersibility and high purity, thereby being capable of improving, by increasing the conductivity within an electrode, battery performance, particularly, battery performance at room temperature and low temperature when applied to a battery.