公开(公告)号：US11929496B2

公开(公告)日：2024-03-12

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: H01M4/00 ,  H01M4/04 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/38 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M4/38 ,  H01M4/0404 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/623 ,  H01M10/0525 ,  H01M2220/20

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：US20180241071A1

公开(公告)日：2018-08-23

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

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：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：US20180159131A1

公开(公告)日：2018-06-07

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 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525

CPC classification number: H01M4/622 ,  H01M4/13 ,  H01M4/505 ,  H01M4/525 ,  H01M4/623 ,  H01M4/625 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/028

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：US11108050B2

公开(公告)日：2021-08-31

申请号：US15759677

申请日：2017-03-24

Applicant: LG Chem, Ltd.

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

IPC: H01M4/62 ,  H01M10/05 ,  H01M4/13 ,  C01B32/174 ,  H01B1/24 ,  H01M4/139 ,  H01M10/0525 ,  H01M10/052 ,  H01M4/02 ,  H01M4/04

Abstract: The present invention provides a conductive material dispersed liquid including a conductive material which includes bundle-type carbon nanotubes; a dispersant which includes a hydrogenated nitrile-based rubber; and a dispersion medium, where a complex modulus (|G*| @ 1 Hz) is in a range of 20 to 500 Pa when measured by a rheometer at a frequency of 1 Hz, and a secondary battery manufactured using the same. The conductive material dispersed liquid has a controlled complex modulus to exhibit excellent dispersibility and powder resistance characteristics, and as a result, can greatly improve the output characteristics of batteries.

公开(公告)号：US20210104338A1

公开(公告)日：2021-04-08

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

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：US20180219212A1

公开(公告)日：2018-08-02

申请号：US15747367

申请日：2016-12-08

Applicant: LG Chem, Ltd.

Inventor： Jong Heon Seol ,  Min Hee Lee ,  Dong Kyu Kim ,  Jae Woong Kim ,  Ye Lin Kim ,  Sang Hoon Choy ,  Je Young Kim ,  Sun Kyu Kim

IPC: H01M4/133 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62

CPC classification number: H01M4/133 ,  H01M4/131 ,  H01M4/364 ,  H01M4/505 ,  H01M4/525 ,  H01M4/622 ,  H01M4/625 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028

Abstract: Provided herein are a positive electrode for a secondary battery and a secondary battery including the same. The positive electrode includes a positive electrode active material layer including a positive electrode active material, a conductive material, and a dispersant, wherein the conductive material includes bundle-type carbon nanotubes, units of which have an average strand diameter of 15 nm or less, and the positive electrode active material layer has a packing density of 3.0 g/cc or more, and has an average pore diameter of 0.1 μm to 0.5 μm at the packing density when a pore size distribution is measured by mercury intrusion porosimetry, and thus may exhibit excellent electrolyte wetting properties. As a result, when the positive electrode is applied to a battery, wetting time of the positive electrode is shortened, and an area of the positive electrode that is not filled with an electrolyte is reduced, resulting in enhanced battery performance.

公开(公告)号：US11757124B2

公开(公告)日：2023-09-12

申请号：US16943006

申请日：2020-07-30

Applicant: LG Chem, Ltd.

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

IPC: H01M10/04 ,  H01M4/04 ,  H01M50/46 ,  H01M10/0585 ,  H01M10/0583

CPC classification number: H01M10/0431 ,  H01M4/0404 ,  H01M10/0585 ,  H01M50/46 ,  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：US11171322B2

公开(公告)日：2021-11-09

申请号：US15747367

申请日：2016-12-08

Applicant: LG Chem, Ltd.

Inventor： Jong Heon Seol ,  Min Hee Lee ,  Dong Kyu Kim ,  Jae Woong Kim ,  Ye Lin Kim ,  Sang Hoon Choy ,  Je Young Kim ,  Sun Kyu Kim

IPC: H01M4/133 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/052 ,  H01M4/36 ,  H01M4/131 ,  H01M10/0525 ,  H01M4/02

Abstract: Provided herein are a positive electrode for a secondary battery and a secondary battery including the same. The positive electrode includes a positive electrode active material layer including a positive electrode active material, a conductive material, and a dispersant, wherein the conductive material includes bundle-type carbon nanotubes, units of which have an average strand diameter of 15 nm or less, and the positive electrode active material layer has a packing density of 3.0 g/cc or more, and has an average pore diameter of 0.1 μm to 0.5 μm at the packing density when a pore size distribution is measured by mercury intrusion porosimetry, and thus may exhibit excellent electrolyte wetting properties. As a result, when the positive electrode is applied to a battery, wetting time of the positive electrode is shortened, and an area of the positive electrode that is not filled with an electrolyte is reduced, resulting in enhanced battery performance.

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.).