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.

公开(公告)号：US11837376B2

公开(公告)日：2023-12-05

申请号：US17116558

申请日：2020-12-09

Applicant: LG Chem, Ltd.

Inventor： Tea Gon Kim ,  Je Young Kim ,  Hak Yoon Kim ,  Ki Won Sung ,  Ye Lin Kim ,  Joo Yul Baek ,  Jung Keun Yoo ,  Jun Muk Lim ,  Seul Ki Kim

IPC: C01B32/15 ,  B01J23/75 ,  B01J37/02 ,  B01J37/08 ,  H01M4/583 ,  B82Y40/00 ,  H01B1/04 ,  H01M4/13 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0525 ,  B82Y30/00

CPC classification number: H01B1/04 ,  B01J23/75 ,  B01J37/0201 ,  B01J37/08 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/15 ,  H01M4/13 ,  H01M4/364 ,  H01M4/583 ,  H01M4/62 ,  H01M10/0525 ,  C01P2004/32 ,  C01P2004/64 ,  C01P2006/11 ,  C01P2006/40

Abstract: A method for producing a composite conductive material having excellent dispersibility is provided. The method includes supporting a catalyst on surfaces of carbon particles; heat treating the catalyst in a helium or hydrogen atmosphere such that the catalyst penetrate the surfaces of the carbon particles and are impregnated beneath the surfaces of the carbon particles at a contact point between the carbon particles and the impregnated catalyst; and heating the carbon particles having the impregnated catalyst disposed therein in the presence of a source gas to grow carbon nanofibers from the impregnated catalyst to form a composite conductive material, wherein the source gas contains a carbon source, and wherein the carbon nanofibers extend from the contact point to above the surfaces of the carbon particles.

公开(公告)号：US10902968B2

公开(公告)日：2021-01-26

申请号：US16332611

申请日：2018-06-08

Applicant: LG Chem, Ltd.

Inventor： Tea Gon Kim ,  Je Young Kim ,  Hak Yoon Kim ,  Ki Won Sung ,  Ye Lin Kim ,  Joo Yul Baek ,  Jung Keun Yoo ,  Jun Muk Lim ,  Seul Ki Kim

IPC: H01B1/04 ,  H01M4/13 ,  H01M4/36 ,  H01M4/583 ,  B82Y30/00 ,  C01B32/15 ,  B01J23/75 ,  B01J37/02 ,  B01J37/08 ,  H01M4/62 ,  H01M10/0525

Abstract: The present invention provides a composite conductive material having excellent dispersibility and a method for producing the same. In an embodiment, the method includes supporting a catalyst on surfaces of carbon particles; heat treating the catalyst in a helium or hydrogen atmosphere such that the catalyst penetrate the surfaces of the carbon particles and are impregnated beneath the surfaces of the carbon particles at a contact point between the carbon particles and the impregnated catalyst; and heating the carbon particles having the impregnated catalyst disposed therein in the presence of a source gas to grow carbon nanofibers from the impregnated catalyst to form a composite conductive material, wherein the source gas contains a carbon source, and wherein the carbon nanofibers extend from the contact point to above the surfaces of the carbon particles.

公开(公告)号：US20200343541A1

公开(公告)日：2020-10-29

申请号：US16958925

申请日：2019-02-01

Applicant: LG Chem, Ltd.

Inventor： Jung Woo Yoo ,  Ye Lin Kim ,  Tae Gon Kim

IPC: H01M4/38 ,  H01M4/133 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/1393 ,  H01M4/04

Abstract: A positive electrode and a secondary battery including the same are provided. The positive electrode includes a current collector and a positive electrode active material layer disposed on the current collector, wherein the positive active material layer includes a positive electrode active material, a binder, and a multi-walled carbon nanotube, wherein the multi-walled carbon nanotube has an average length of 1-2 μm and has a length standard deviation of 0.5 μm or less.

公开(公告)号：US10797339B2

公开(公告)日：2020-10-06

申请号：US15548599

申请日：2016-06-16

Applicant: LG Chem, Ltd.

Inventor： Jin Young Son ,  Hyun Won Lee ,  Do Hwa Jung ,  Ye Lin Kim

IPC: H01M10/04 ,  H01M2/16 ,  H01M10/0585 ,  H01M4/04 ,  H01M10/0583

Abstract: The present invention relates to an electrode assembly for a secondary battery. The electrode assembly for the secondary battery comprises a radical unit comprising first and second electrode sheets each of which is folded so that both ends thereof overlap each other; and a first separator folded several times and having an upper folded portion into which the first electrode sheet is coupled to be fitted and a lower folded portion into which the second electrode sheet is coupled to be fitted, wherein, in the radical unit, the folded portions of the first and second electrode sheets are cut to form two first electrodes and two second electrodes, which are completely separated from each other, and the first electrode, the first separator, the second electrode, the first separator, the first electrode, the first separator, and the second electrode successively stacked.

公开(公告)号：US10727477B2

公开(公告)日：2020-07-28

申请号：US15738909

申请日：2016-10-28

Applicant: LG Chem, Ltd.

Inventor： Ye Lin Kim ,  Ki Yeon Jo ,  Jung Keun Yoo ,  Je Young Kim ,  Sang Hoon Choy ,  Jong Heon Seol

IPC: H01M4/04 ,  H01M4/13 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/1391 ,  H01M4/131

Abstract: The present invention provides a conductive material dispersed liquid, including: a conductive material which includes bundle-type carbon nanotubes; a dispersant; a dispersion medium, where a phase angle is in a range of 3° to 18° when measured by a rheometer at a frequency of 1 Hz; and a lithium secondary battery manufactured using the conductive material dispersed liquid. The conductive material dispersed liquid has high solid-like properties, and thus allows the formation of an electrode active material layer having a uniform thickness with no concern for collapse or occurrence of cracks during manufacture of an electrode, and thereby can improve the performance characteristics, particularly capacity characteristics, of a battery.

公开(公告)号：US10476081B2

公开(公告)日：2019-11-12

申请号：US15567853

申请日：2016-06-10

Applicant: LG Chem, Ltd.

Inventor： Jong Heon Seol ,  Ye Lin Kim ,  Sang Hoon Choy

IPC: H01M4/62 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M4/02

Abstract: Provided are a positive electrode material mixture, in which, the positive electrode material mixture includes a positive electrode active material, a conductive agent, and a binder, wherein the conductive agent includes a particulate conductive agent, a fibrous conductive agent, and a plate-shaped conductive agent, and the binder includes a crystalline binder having a weight-average molecular weight (Mw) of 500,000 g/mol to 900,000 g/mol and an amorphous binder having a weight-average molecular weight (Mw) of 200,000 g/mol to 400,000 g/mol.

公开(公告)号：US20180175370A1

公开(公告)日：2018-06-21

申请号：US15738909

申请日：2016-10-28

Applicant: LG Chem, Ltd.

Inventor： Ye Lin Kim ,  Ki Yeon Jo ,  Jung Keun Yoo ,  Je Young Kim ,  Sang Hoon Choy ,  Jong Heon Seol

IPC: H01M4/133 ,  H01M4/1393 ,  H01M10/0525 ,  H01M4/62

Abstract: The present invention provides a conductive material dispersed liquid, including: a conductive material which includes bundle-type carbon nanotubes; a dispersant; a dispersion medium, where a phase angle is in a range of 3° to 18° when measured by a rheometer at a frequency of 1 Hz; and a lithium secondary battery manufactured using the conductive material dispersed liquid. The conductive material dispersed liquid has high solid-like properties, and thus allows the formation of an electrode active material layer having a uniform thickness with no concern for collapse or occurrence of cracks during manufacture of an electrode, and thereby can improve the performance characteristics, particularly capacity characteristics, of a battery.