公开(公告)号：US11515515B2

公开(公告)日：2022-11-29

申请号：US16754388

申请日：2018-10-19

Applicant: LG CHEM, LTD.

Inventor： Il Geun Oh ,  Eun Kyung Kim ,  Yong Ju Lee ,  Rae Hwan Jo ,  Su Min Lee ,  Jung Hyun Choi ,  Dong Hyuk Kim ,  Se Mi Park

IPC: H01M4/04 ,  H01M4/131 ,  H01M4/58 ,  H01M4/134 ,  H01M10/0525 ,  C01B33/32 ,  H01M4/1395 ,  H01M4/02

Abstract: The present invention relates to a method of preparing a negative electrode active material which includes forming a mixture by mixing Li2O and SiOx(0

公开(公告)号：US11495797B2

公开(公告)日：2022-11-08

申请号：US16761662

申请日：2018-11-06

Applicant: LG CHEM, LTD.

Inventor： Il Geun Oh ,  Eun Kyung Kim ,  Yong Ju Lee ,  Rae Hwan Jo ,  Su Min Lee ,  Jung Hyun Choi

IPC: H01M4/587 ,  H01M4/04 ,  H01M4/38 ,  H01M4/02

Abstract: A negative electrode active material including a silicon-carbon-based particle, the silicon-carbon-based particle having a SiCx matrix and boron doped in the SiCx matrix, wherein x of the SiCx matrix is 0.3 or more and less than 0.6.

公开(公告)号：US11322734B2

公开(公告)日：2022-05-03

申请号：US16611394

申请日：2018-05-10

Applicant: LG CHEM, LTD.

Inventor： Jung Hyun Choi ,  Yong Ju Lee ,  Dong Hyuk Kim ,  Eun Kyung Kim ,  Rae Hwan Jo ,  Il Geun Oh

IPC: H01M4/133 ,  H01M4/525 ,  H01B1/04 ,  H01M4/131 ,  H01M4/134 ,  H01M4/136 ,  H01M4/36 ,  H01M4/38 ,  H01M4/58 ,  H01M4/583 ,  H01M10/0525 ,  H01M4/02

Abstract: A negative electrode active material which includes a secondary particle including first primary particles, wherein the first primary particle includes a core including SiOx, wherein 0≤x

公开(公告)号：US12034165B2

公开(公告)日：2024-07-09

申请号：US16696672

申请日：2019-11-26

Applicant: LG CHEM, LTD.

Inventor： Jung Hyun Choi ,  Yong Ju Lee ,  Eun Kyung Kim ,  Rae Hwan Jo ,  Dong Hyuk Kim ,  Il Geun Oh

IPC: H01M4/587 ,  H01M4/36 ,  H01M4/485 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M4/587 ,  H01M4/366 ,  H01M4/485 ,  H01M4/623 ,  H01M10/0525

Abstract: A negative electrode active material including silicon-based active material particles each including a core including SiOx, wherein 0≤x≤2, and a coating layer present on the core. Also, a negative electrode active material in which the coating layer is any one of a carbon coating layer or a polymer coating layer, and the coating layer includes a fluorinated material including at least one of an alkali metal or an alkaline earth metal.

公开(公告)号：US20220093912A1

公开(公告)日：2022-03-24

申请号：US17540744

申请日：2021-12-02

Applicant: LG Chem, Ltd.

Inventor： Yong Ju Lee ,  Sun Young Shin ,  Se Mi Park ,  Il Geun Oh ,  Eun Kyung Kim

IPC: H01M4/1391 ,  H01M4/04 ,  H01M4/131 ,  H01M4/134 ,  H01M4/38 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525

Abstract: The present invention relates to a method of preparing a positive electrode for a secondary battery, which includes preparing a positive electrode by forming a positive electrode active material layer including a positive electrode active material, a conductive agent, and a binder on a positive electrode collector, impregnating the positive electrode in a sacrificial salt solution including a sacrificial salt additive, and, after the impregnating of the positive electrode in the sacrificial salt solution, drying the positive electrode to fill pores of the positive electrode active material layer with the sacrificial salt additive, and a positive electrode for a secondary battery prepared thereby.

公开(公告)号：US20200373559A1

公开(公告)日：2020-11-26

申请号：US16959301

申请日：2019-02-19

Applicant: LG Chem, Ltd.

Inventor： Joo Yul Baek ,  Jun Muk Lim ,  Chang Ju Lee ,  Il Geun Oh ,  Je Young Kim ,  Sang Hoon Choy

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

Abstract: A positive electrode includes a current collector and a positive electrode active material layer disposed on the current collector, wherein the positive electrode active material layer includes a positive electrode active material, carbon nanotube, and a binder, the binder includes polyvinylidene fluoride which has a weight average molecular weight of 720,000 g/mol to 980,000 g/mol, a BET specific surface area of the carbon nanotube is 140 m2/g to 195 m2/g, and the positive electrode satisfies the following Formula 1: 1.3≤B/A≤3.4  [Formula 1] in Formula 1, B is an amount (wt %) of the polyvinylidene fluoride in the positive electrode active material layer, and A is an amount (wt %) of the carbon nanotube in the positive electrode active material layer.

公开(公告)号：US20190267614A1

公开(公告)日：2019-08-29

申请号：US16346347

申请日：2018-05-25

Applicant: LG Chem, Ltd.

Inventor： Yong Ju Lee ,  Sun Young Shin ,  Se Mi Park ,  Il Geun Oh ,  Eun Kyung Kim

IPC: H01M4/1391 ,  H01M4/131 ,  H01M4/134 ,  H01M4/62 ,  H01M4/525 ,  H01M4/38 ,  H01M4/04 ,  H01M10/0525

Abstract: The present invention relates to a method of preparing a positive electrode for a secondary battery, which includes preparing a positive electrode by forming a positive electrode active material layer including a positive electrode active material, a conductive agent, and a binder on a positive electrode collector, impregnating the positive electrode in a sacrificial salt solution including a sacrificial salt additive, and, after the impregnating of the positive electrode in the sacrificial salt solution, drying the positive electrode to fill pores of the positive electrode active material layer with the sacrificial salt additive, and a positive electrode for a secondary battery prepared thereby.