公开(公告)号：US10573925B2

公开(公告)日：2020-02-25

申请号：US15768891

申请日：2017-06-16

Applicant: LG CHEM, LTD.

Inventor： Oh Byong Chae ,  Sang Wook Woo ,  Hee Won Choi ,  Eun Kyung Kim

IPC: H01M10/058 ,  H01M4/04 ,  H01M4/38 ,  H01M10/0525 ,  H01M10/643 ,  H01M10/04 ,  H01M4/1395 ,  H01M4/134 ,  H01M4/02 ,  H01M10/052

Abstract: The present invention relates to an electrode for a secondary battery, comprising an electrode current collector and a lithium metal layer disposed on one surface of the electrode current collector, wherein a thickness difference between the thinnest portion and the thickest portion of the lithium metal layer is 1,000 pm or less, and a method of manufacturing the same.

公开(公告)号：US11799072B2

公开(公告)日：2023-10-24

申请号：US17058194

申请日：2020-01-03

Applicant: LG CHEM, LTD.

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

IPC: H01M4/36 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/364 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: An anode active material for a secondary battery, which has improved cycle swelling properties and rapid charge performance, an anode comprising an anode active material for a secondary battery, and a method for manufacturing same. The anode active material is a mixture of scaly natural graphite and spherical natural graphite. An average particle diameter (D50) of the scaly natural graphite is 10 μm to 15 μm and an average particle diameter (D50) of the spherical natural graphite is 14 μm or less.

公开(公告)号：US11784314B2

公开(公告)日：2023-10-10

申请号：US16973617

申请日：2019-08-12

Applicant: LG CHEM, LTD.

Inventor： Hee Won Choi ,  Sang Wook Woo

IPC: H01M4/66 ,  H01M4/133 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/661 ,  H01M4/133 ,  H01M4/366 ,  H01M10/0525 ,  H01M2004/027

Abstract: A negative electrode for a lithium secondary battery including a negative electrode current collector and a negative electrode active material layer formed on at least one surface of the negative electrode current collector. The negative electrode active material layer includes a negative electrode active material including artificial graphite particles, and the negative electrode has a pore resistance Rp of 6Ω or less.

公开(公告)号：US10804539B2

公开(公告)日：2020-10-13

申请号：US16303039

申请日：2017-09-29

Applicant: LG CHEM, LTD.

Inventor： Hee Won Choi ,  Sang Wook Woo ,  Oh Byong Chae ,  Eun Kyung Kim

IPC: H01M4/62 ,  H01M4/04 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/36 ,  H01M4/38 ,  H01M10/052 ,  H01M10/42 ,  H01M4/1399 ,  H01M4/137 ,  H01M4/02 ,  H01M10/04

Abstract: A negative electrode for a lithium-metal secondary battery and a lithium-metal secondary battery including the same are provided which have an excellent life characteristic and have less irregular resin phases formed on the surface the negative electrode. The negative electrode includes a polymer layer arranged in a lattice structure having vacant spaces, so that the specific surface area of the negative electrode can be increased, a uniform current density distribution can thereby be achieved, the negative electrode has excellent life characteristics, and the formation of irregular resin phases can be suppressed.

公开(公告)号：US11799070B2

公开(公告)日：2023-10-24

申请号：US16981925

申请日：2019-04-02

Applicant: LG CHEM, LTD.

Inventor： Hee Won Choi ,  Jae Wook Lee ,  Eun Kyung Kim ,  Seung Youn Choi ,  Je Young Kim

IPC: H01M4/36 ,  C01B32/21 ,  H01M4/133 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/364 ,  C01B32/21 ,  H01M4/133 ,  H01M4/366 ,  H01M4/587 ,  H01M10/0525 ,  C01P2002/88 ,  C01P2004/61 ,  C01P2004/84 ,  C01P2006/40 ,  H01M2004/021 ,  H01M2004/027

Abstract: A negative electrode active material for a lithium secondary battery, including: first negative electrode active material particles including first artificial graphite particles and a carbon coating layer on a surface of the first artificial graphite particles, wherein the carbon coating layer comprises hard carbon; and second negative electrode active material particles including second artificial graphite particles, wherein a difference between an average particle diameter D50 of the first negative electrode active material particles and an average particle diameter D50 of the second negative electrode active material particles is 5 μm or less, and a temperature at an exothermic peak in differential thermogravimetric analysis of the carbon coating layer is in a range of 580° C. to 690° C.

公开(公告)号：US11764349B2

公开(公告)日：2023-09-19

申请号：US16966740

申请日：2019-03-14

Applicant: LG CHEM, LTD.

Inventor： Hee Won Choi ,  Jae Wook Lee ,  Eun Kyung Kim ,  Seung Youn Choi ,  Je Young Kim

IPC: H01M4/133 ,  H01M4/04 ,  H01M10/0525 ,  H01M10/44 ,  H01M4/02

CPC classification number: H01M4/133 ,  H01M4/0404 ,  H01M10/0525 ,  H01M10/44 ,  H01M2004/021 ,  H01M2004/027

Abstract: A negative electrode active material for a lithium secondary battery, a negative electrode including the same, and a lithium secondary battery including the negative electrode. Specifically, the present invention relates to a negative electrode active material capable of minimizing changes in a structure and internal total pore volume of an electrode during rolling of the electrode by controlling the type and amount of carbon coated on a surface of an artificial graphite active material, a negative electrode including the same, and a lithium secondary battery including the negative electrode.

公开(公告)号：US11108046B2

公开(公告)日：2021-08-31

申请号：US16510064

申请日：2019-07-12

Applicant: LG CHEM, LTD.

Inventor： Hee Won Choi ,  Dong Sub Jung

IPC: H01M4/587 ,  H01M10/0525 ,  H01M4/02

Abstract: A negative electrode active material for a lithium secondary battery, which includes: natural graphite particles; and soft carbon particles having a BET specific surface area of 7.6 m2/g or more, wherein the natural graphite particles and the soft carbon particles are present in the negative electrode active material at a range of weight ratio of 78:22 to 92:8. Also a negative electrode containing the negative electrode active material and a lithium secondary battery containing the negative electrode.

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：US11522198B2

公开(公告)日：2022-12-06

申请号：US16303011

申请日：2017-09-29

Applicant: LG CHEM, LTD.

Inventor： Hee Won Choi ,  Sang Wook Woo ,  Oh Byong Chae ,  Eun Kyung Kim

IPC: H01M4/66 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/80 ,  H01M4/38 ,  H01M4/04 ,  H01M10/052 ,  H01M4/02

Abstract: A negative electrode for a lithium-metal secondary battery, which has a wide specific surface area and a current density distribution that can be uniformly implemented, and a lithium-metal secondary battery including the same.

公开(公告)号：US10439221B2

公开(公告)日：2019-10-08

申请号：US15737652

申请日：2016-12-23

Applicant: LG CHEM, LTD.

Inventor： Hee Won Choi ,  Sang Wook Woo ,  Dong Sub Jung ,  Dong Hyuk Kim ,  Eun Kyung Kim

IPC: H01M4/587 ,  H01M4/133 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/525 ,  H01M4/505 ,  H01M10/052 ,  H01M4/02

Abstract: The present invention relates to a negative electrode active material for a lithium secondary battery, which includes (A) first artificial graphite having an average particle diameter (D50) of 15 μm to 20 μm and (B) second artificial graphite having an average particle diameter (D50) of 3 μm to 5 μm, wherein the first artificial graphite (A) includes a secondary artificial graphite particle, in which at least one primary artificial graphite particle is agglomerated, and a carbon coating layer, and a weight ratio of the first artificial graphite to the second artificial graphite is in a range of 85:15 to 95:5, a negative electrode including the same, and a lithium secondary battery including the negative electrode.