公开(公告)号：US12034148B2

公开(公告)日：2024-07-09

申请号：US16756365

申请日：2018-10-26

Applicant: LG CHEM, LTD.

Inventor： Su Min Lee ,  Yong Ju Lee ,  Eun Kyung Kim ,  Rae Hwan Jo ,  Dong Hyuk Kim ,  Se Mi Park

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/38 ,  H01M4/48 ,  H01M4/587 ,  H01M10/0525

CPC classification number: H01M4/364 ,  H01M4/386 ,  H01M4/483 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: A negative electrode active material for a lithium secondary battery, the negative electrode active material including, based on 100 parts by weight of the total negative electrode active material, 5 parts by weight to 20 parts by weight of a first carbon-based particle, 55 parts by weight to 90 parts by weight of a second carbon-based particle, and 1 part by weight to 40 parts by weight of a silicon-based particle, wherein the specific surface area of the first carbon-based particle is 1.5 m2/g to 4.5 m2/g, the specific surface area of the second carbon-based particle is 0.4 m2/g to 1.5 m2/g, and the specific surface area of the first carbon-based particle is greater than the specific surface area of the second carbon-based particle, and capable of solving the problem of lifespan deterioration which may be caused by the use of a silicon-based particle as a negative electrode active material.

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：US11063294B2

公开(公告)日：2021-07-13

申请号：US15754174

申请日：2016-11-09

Applicant: LG Chem, Ltd.

Inventor： Se Mi Park ,  Yong Jun Kim ,  Chae Ah Kim ,  Seok Koo Kim ,  Seung Hyun Chung

IPC: H01M10/0565 ,  H01M10/04 ,  H01M10/0525 ,  H01M10/0585 ,  B29C35/00 ,  B29C35/02 ,  H01M4/1315

Abstract: The present invention provides a curing die for manufacturing a gel polymer electrolyte, and a method for manufacturing a gel polymer battery cell by using the same, the curing die comprising: a first die having a recessed part, which is formed inside a battery case and has a processing battery cell mounted therein and including an electrode assembly and a composition for forming the gel polymer electrolyte; and a second die coupled to the first die so as to seal the processing battery cell mounted in the recessed part.

公开(公告)号：US20200227740A1

公开(公告)日：2020-07-16

申请号：US16745904

申请日：2020-01-17

Applicant: LG Chem, Ltd.

Inventor： Se Mi Park ,  Eun Kyung Kim ,  Yong Ju Lee ,  Sun Young Shin ,  Dong Hyuk Kim

IPC: H01M4/505 ,  H01M4/525 ,  H01M2/16 ,  H01M4/134 ,  H01M4/133

Abstract: An electrode for batteries that does not include a metal-film-type current collector is disclosed herein. In some embodiments, the electrode comprises a composite having a core-shell structure including a core having an electrode active material, and a metal material coated on or doped in the surface of the core. A secondary battery having the electrode has increased capacity and energy density and exhibits improved lifespan characteristics.

公开(公告)号：US20180254468A1

公开(公告)日：2018-09-06

申请号：US15753765

申请日：2016-09-12

Applicant: LG Chem, Ltd.

Inventor： Yong Jun Kim ,  Seok Koo Kim ,  Chae Ah Kim ,  Se Mi Park ,  Seung Hyun Chung

IPC: H01M2/26 ,  H01M10/0525 ,  H01M10/058

CPC classification number: H01M2/266 ,  H01M2/263 ,  H01M10/0525 ,  H01M10/058 ,  H01M2220/20 ,  Y02T10/7011

Abstract: The present invention provides a battery cell including: an electrode assembly including an electrode tab protruding toward at least one external side; a battery case including a receiving portion on which the electrode assembly is received; and an electrode lead connected to the electrode tab to be connected to an external device, wherein the electrode lead may include: a tab connecting portion electrically connected to the electrode tab; and a protruding extension protruding outside of the battery case in a state of extending from the tab connecting portion to be electrically connected to the external device, and the tab connecting portion may be formed so that a length of a width direction perpendicular to a protruding direction of the electrode tab may be relatively larger than that of the electrode tab.