公开(公告)号：US12113203B2

公开(公告)日：2024-10-08

申请号：US17254516

申请日：2019-07-04

Applicant: LG CHEM, LTD.

Inventor： Oh Byong Chae ,  Sang Wook Woo ,  Ye Ri Kim

IPC: H01M4/1395 ,  H01M4/04 ,  H01M4/133 ,  H01M4/134 ,  H01M4/1393 ,  H01M4/36 ,  H01M4/38 ,  H01M4/485 ,  H01M4/58 ,  H01M10/04 ,  H01M10/0525 ,  H01M10/058 ,  H01M4/02

CPC classification number: H01M4/1395 ,  H01M4/0445 ,  H01M4/0469 ,  H01M4/133 ,  H01M4/134 ,  H01M4/1393 ,  H01M4/364 ,  H01M4/366 ,  H01M4/382 ,  H01M4/485 ,  H01M4/58 ,  H01M10/049 ,  H01M10/0525 ,  H01M10/058 ,  H01M2004/027

Abstract: A negative electrode for a lithium secondary battery, a negative electrode in which the negative electrode is pre-lithiated, a method of manufacturing the negative electrode, and a lithium secondary battery including the negative electrode. The pre-lithiated negative electrode may increase the capacity and improve the electrochemical performance of a lithium secondary battery by securing the initial reversibility of a 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.

公开(公告)号：US10361426B2

公开(公告)日：2019-07-23

申请号：US15035635

申请日：2015-07-27

Applicant: LG Chem, Ltd.

Inventor： Jun Hyuk Song ,  Eun Kyung Kim ,  Dong Sub Jung ,  Sang Wook Woo ,  Ye Ri Kim ,  Ju Ho Chung

IPC: H01M10/0525 ,  H01M4/36 ,  H01M4/133 ,  H01M4/587 ,  H01M4/62 ,  C01B32/20 ,  H01M4/02

Abstract: The present disclosure relates to a secondary graphite particle comprising an initial natural graphite particle of excellent high capacity and output characteristic, aggregated, bonded or assembled with an initial artificial graphite particle of excellent cycle characteristic and swelling characteristic, thus having superior rollability that leads into increased density, a negative electrode using the secondary graphite particle as a negative electrode active material, and a secondary lithium battery comprising the negative electrode. Accordingly, the secondary lithium battery comprising the secondary graphite particle as described above as the negative electrode active material has an effect of enhanced high rate charging and discharging capability, cycle characteristic and swelling characteristic.

公开(公告)号：US10205169B2

公开(公告)日：2019-02-12

申请号：US15032396

申请日：2015-09-23

Applicant: LG Chem, Ltd.

Inventor： Jun Hyuk Song ,  Eun Kyung Kim ,  Sang Wook Woo ,  Sung Bin Park ,  Ye Ri Kim ,  Ju Ho Chung

IPC: H01M4/62 ,  H01M4/485 ,  H01M10/052 ,  C23C16/56 ,  H01M4/04 ,  H01M4/36 ,  H01M10/0525 ,  C01D15/02 ,  C01G23/00 ,  H01M4/02

Abstract: A negative active material for rechargeable lithium secondary batteries, a method of preparing the same, and a rechargeable lithium secondary battery including the same are disclosed. The negative active material includes a core including a lithium titanium oxide of Formula 1, and a coating layer positioned on a surface of the core and including an acid anhydride physisorbed onto the core, and thus can be useful in inhibiting battery side reactions and gas generation and improving battery performance since moisture formed during a redox reaction is effectively absorbed into a surface of the negative active material. LixTiyO4  [Formula 1] In Formula 1, x and y are as defined in the detailed description.

公开(公告)号：US11862799B2

公开(公告)日：2024-01-02

申请号：US17049471

申请日：2019-12-10

Applicant: LG CHEM, LTD.

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

IPC: H01M4/587 ,  H01M4/133 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/587 ,  H01M4/133 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: An anode active material for a secondary battery that has improved cycle swelling properties and rapid charge performance, an anode comprising same, and a method for manufacturing same. The anode active material is a mixture of artificial graphite and spherical natural graphite, wherein the spherical natural graphite has an average particle diameter (D 50) of 12 μm or less, with D 90-D 10 value ranging from 5 μm to 12 μm.

公开(公告)号：US11710815B2

公开(公告)日：2023-07-25

申请号：US16494458

申请日：2018-07-11

Applicant: LG Chem, Ltd.

Inventor： Oh Byong Chae ,  Sang Wook Woo ,  Eun Kyung Kim ,  Yoon Ah Kang ,  Jun Hyuk Song

IPC: H01M4/04 ,  H01M4/36 ,  H01M4/38 ,  H01M4/48 ,  H01M4/62 ,  H01M10/052 ,  H01M4/1395 ,  H01M4/134 ,  H01M4/02

CPC classification number: H01M4/0445 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/366 ,  H01M4/386 ,  H01M4/483 ,  H01M4/62 ,  H01M4/622 ,  H01M10/052 ,  H01M2004/027

Abstract: The present invention relates to a negative electrode for a secondary battery which comprises a negative electrode collector, a negative electrode active material layer formed on the negative electrode collector, and a lithium metal layer, wherein an adhesive layer is disposed between the negative electrode active material layer and the lithium metal layer, and the lithium metal layer comprises lithium and metal oxide in a weight ratio of 50:50 to 99:1.

公开(公告)号：US11539039B2

公开(公告)日：2022-12-27

申请号：US16310534

申请日：2018-01-23

Applicant: LG CHEM, LTD.

Inventor： Oh Byong Chae ,  Eun Kyung Kim ,  Dong Sub Jung ,  Sang Wook Woo ,  Ju Ho Chung ,  Hee Won Choi

IPC: H01M4/133 ,  H01M4/04 ,  H01M4/1393 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/02

Abstract: A negative electrode for a lithium secondary battery, in which a LiF layer comprising amorphous LiF in an amount of 30 mol % or more is formed on a negative electrode active material layer comprising a carbon-based active material, a lithium secondary battery comprising the same, and a preparation method thereof.

公开(公告)号：US11508953B2

公开(公告)日：2022-11-22

申请号：US16478675

申请日：2018-04-17

Applicant: LG CHEM, LTD.

Inventor： Oh Byong Chae ,  Yoon Ah Kang ,  Jun Hyuk Song ,  Eun Kyung Kim ,  Sang Wook Woo

IPC: H01M4/134 ,  H01M4/04 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/1395 ,  H01M4/38 ,  H01M10/0525 ,  H01M4/02

Abstract: A negative electrode for a lithium secondary battery, which includes a negative electrode active material layer formed on a negative electrode collector, and a coating layer formed on the negative electrode active material layer and which includes lithium metal and metal oxide, a lithium secondary battery including the same, and a method of preparing the negative electrode.