公开(公告)号：US11866338B2

公开(公告)日：2024-01-09

申请号：US17257184

申请日：2020-01-17

Applicant: LG CHEM, LTD.

Inventor： Hee Won Choi ,  Je Young Kim ,  Sang Wook Woo ,  Li Lin Piao

IPC: C01B32/205 ,  C01B32/21

CPC classification number: C01B32/205 ,  C01B32/21 ,  C01P2004/32 ,  C01P2006/17

Abstract: An anode active material for secondary batteries which has improved cycle swelling characteristics and rapid charge performance, an anode comprising same, and a method for manufacturing same, in which the anode active material is manufactured by modifying the surface of natural graphite particles. The natural graphite particles have a Dmax/Dmin value of 1.6 to 2.1 in the particle size distribution thereof and have, formed in the surface thereof, pores having a diameter of 0.5 μm to 2.0 μm.

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：US10741841B2

公开(公告)日：2020-08-11

申请号：US14787992

申请日：2014-07-16

Applicant: LG Chem, Ltd.

Inventor： Hoe Jin Hah ,  Kyoung Ho Kim ,  Il Hong Kim ,  Je Young Kim

IPC: H01M4/36 ,  H01M4/58 ,  H01M4/525 ,  H01M4/505 ,  H01M4/587 ,  H01M4/38 ,  H01M10/052 ,  H01M4/62 ,  H01M10/0525

Abstract: Disclosed are an electrode active material having improved energy density and a lithium secondary battery including the same. More particularly, provided is an electrode active material including a first electrode active material and a second electrode active material, each of the first electrode active material and the second electrode active material having a composition represented by Formula (1) below, a ratio of lithium to metals in the first electrode active material being 1.4 to 1.7, and a ratio of lithium to metals in the second electrode active material being 1.2 or more and less than 1.4: (1−x)LiM′O2−yAy−xLi2MnO3−y′Ay′  (1) wherein M′ is MnaMb; M is at least one selected from the group consisting of Ni, Ti, Co, Al, Cu, Fe, Mg, B, Cr, Zr, Zn and Period II transition metals; A is at least one selected from the group consisting of anions such as PO4, BO3, CO3, F and NO3; 0

公开(公告)号：US10439208B2

公开(公告)日：2019-10-08

申请号：US14892872

申请日：2014-07-24

Applicant: LG Chem, Ltd.

Inventor： In Sung Uhm ,  Jungwoo Yoo ,  Je Young Kim ,  Hoe Jin Hah ,  Ji Yoon Kwon

IPC: H01M4/36 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/052 ,  H01M4/38 ,  H01M4/587 ,  H01M4/13 ,  H01M4/02

Abstract: Disclosed is a negative electrode active material for secondary batteries having improved lifespan characteristics. In particular, provided is a negative electrode active material, for secondary batteries, including silicon (Si), and amorphous hard carbon or low-crystalline soft carbon.

公开(公告)号：US10205137B2

公开(公告)日：2019-02-12

申请号：US14890034

申请日：2014-06-03

Applicant: LG Chem, Ltd.

Inventor： In Sung Uhm ,  Ji Yoon Kwon ,  Jung Woo Yoo ,  Je Young Kim ,  Hoe Jin Hah ,  Kyoung Ho Kim ,  Il Hong Kim

IPC: H01M2/02 ,  H01M4/58 ,  H01M10/0525 ,  H01M4/525 ,  H01M10/052 ,  H01M6/38

Abstract: Disclosed is a secondary battery to which an electrolyte can be additionally supplied. More particularly, provided is a secondary battery including an electrode assembly that includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode, and a porous elastic body that can contain an electrolyte, which are installed in a battery case.

公开(公告)号：US10147935B2

公开(公告)日：2018-12-04

申请号：US15507449

申请日：2015-09-24

Applicant: LG Chem, Ltd.

Inventor： Seok Koo Kim ,  In Chul Kim ,  Je Young Kim ,  Hyun Min Kim ,  Jung Ah Shim ,  Sei Woon Oh ,  Eun Ju Lee ,  Ji Eun Lee

IPC: H01M4/02 ,  H01M4/131 ,  H01M4/13 ,  H01M4/485 ,  H01M4/62 ,  H01M4/04 ,  H01M4/136 ,  H01M4/1391 ,  H01M4/75 ,  H01M10/0525

Abstract: Disclosed herein are an electrode configured such that electrode mixture parts, each of which includes an electrode active material, and irreversible parts, each of which includes an irreversible additive, are alternately coated on one surface or both surfaces of a current collector to form an electrode pattern and a secondary battery including the same.

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：US10008720B2

公开(公告)日：2018-06-26

申请号：US14896726

申请日：2014-07-31

Applicant: LG Chem, Ltd.

Inventor： Won Jung Kim ,  Hoe Jin Hah ,  Je Young Kim

IPC: H01M4/58 ,  H01M4/505 ,  H01M4/525 ,  C01G45/12 ,  C01G51/00 ,  C01G53/00 ,  H01M10/0525 ,  H01M10/052

CPC classification number: H01M4/5825 ,  C01G45/1228 ,  C01G45/1257 ,  C01G51/50 ,  C01G53/50 ,  C01P2002/50 ,  C01P2002/52 ,  H01M4/505 ,  H01M4/525 ,  H01M4/582 ,  H01M10/052 ,  H01M10/0525 ,  H01M2220/20 ,  H01M2220/30 ,  Y02E60/122 ,  Y02P70/54

Abstract: Disclosed is a method of preparing a positive electrode active material for lithium secondary batteries, the method including pre-activating at least one lithium transition metal oxide selected from compounds represented by Formula (1) below and modifying a surface of the pre-activated lithium transition metal oxide: (1−x)LiM′O2−yAy−xLi2MnO3−y′Ay′  (1), wherein M′ is MnaMb; M is at least one selected from the group consisting of Ni, Ti, Co, Al, Cu, Fe, Mg, B, Cr, Zr, Zn and Period II transition metals; A is at least one selected from the group consisting of anions such as PO4, BO3, CO3, F and NO3; 0

公开(公告)号：US09991509B2

公开(公告)日：2018-06-05

申请号：US14168185

申请日：2014-01-30

Applicant: LG Chem, Ltd.

Inventor： Jung Woo Yoo ,  Je Young Kim ,  Yong Ju Lee ,  Seung Youn Choi ,  Yoon Ah Kang ,  Mi Rim Lee ,  Hye Ran Jung

IPC: H01M4/36 ,  H01M4/04 ,  H01M4/1393 ,  H01M4/02

CPC classification number: H01M4/366 ,  H01M4/0402 ,  H01M4/0428 ,  H01M4/1393 ,  H01M2004/021

Abstract: Provided are an anode active material including a porous silicon oxide-carbon material composite which includes a porous silicon oxide including pores and a line-type carbon material coated on a surface, in the pores, or on the surface and in the pores of the porous silicon oxide, and a method of preparing the anode active material.Since the silicon oxide of the anode active material according to an embodiment of the present invention may include the plurality of pores, resistance to the mechanical stress due to a volume change may be improved. Also, since the line-type carbon material is bonded to the inside of the pores, conductivity may not be decreased even in the case in which internal cracks occur in the porous silicon oxide and lifetime characteristics may be improved.