公开(公告)号：US20210218029A1

公开(公告)日：2021-07-15

申请号：US17054423

申请日：2019-05-09

Applicant: LG CHEM, LTD.

Inventor： Jun Hyuk SONG ,  Je Young KIM ,  Joo Sung LEE ,  Suk In NOH ,  Hee Won LEE

IPC: H01M4/62 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/485 ,  H01M4/66

Abstract: A negative electrode and a secondary battery including the same are described, the negative electrode including a current collector and a negative electrode active material layer disposed on the current collector, wherein the negative electrode active material layer includes a negative electrode active material including SiOx (0≤x

公开(公告)号：US20200381702A1

公开(公告)日：2020-12-03

申请号：US16958953

申请日：2019-02-18

Applicant: LG CHEM, LTD.

Inventor： Jun Hyuk SONG ,  Je Young KIM ,  Joo Sung LEE ,  Suk In NOH ,  Hee Won LEE

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

Abstract: The present invention relates to a secondary battery capacity recovery method and apparatus for recovering the capacity of a secondary battery with deteriorated lifespan characteristics. The secondary battery capacity recovery method of the present invention comprises: (1) preparing a secondary battery with deteriorated lifespan characteristics; (2) heating the secondary battery with deteriorated lifespan characteristics while pressing the secondary battery with deteriorated lifespan characteristics to compress a positive electrode, negative electrode, or separator included in the secondary battery; and (3) charging/discharging the secondary battery with deteriorated lifespan characteristics, the secondary battery having been pressed and heated, and the secondary battery with deteriorated lifespan characteristics may be charged and discharged while being pressed and heated, thereby exhibiting an effect of recovering the capacity of the secondary battery with deteriorated lifespan characteristics.

公开(公告)号：US20180316013A1

公开(公告)日：2018-11-01

申请号：US15771276

申请日：2017-07-14

Applicant: LG CHEM, LTD.

Inventor： Jung Pil LEE ,  Hee Won LEE

IPC: H01M4/583 ,  H01M10/052 ,  H01M10/44 ,  H01M4/505 ,  H01M4/66 ,  H01M10/0569 ,  H01M4/62 ,  H01M2/16

CPC classification number: H01M4/13 ,  H01M4/139 ,  H01M4/1391 ,  H01M4/36 ,  H01M4/366 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/583 ,  H01M4/621 ,  H01M4/622 ,  H01M10/052 ,  H01M2004/027

Abstract: The present invention relates to a negative electrode and a secondary battery including the same, and particularly, to a negative electrode which includes a current collector; a first active material layer disposed on the current collector and including at least one concave portion exposing a portion of the current collector; a stress-relaxing portion disposed in the concave portion; and a second active material layer disposed on the first active material layer and the stress-relaxing portion and separated from the current collector, and a secondary battery including the same.

公开(公告)号：US20200212438A1

公开(公告)日：2020-07-02

申请号：US16634712

申请日：2018-08-27

Applicant: LG CHEM, LTD.

Inventor： Joo Sung LEE ,  Hee Won LEE

IPC: H01M4/38 ,  H01M4/134 ,  H01M4/36 ,  H01M4/62 ,  H01M4/66 ,  H01M4/60 ,  H01M10/0525

Abstract: A negative electrode for a lithium secondary battery including: a negative electrode current collector; and a negative electrode active material layer disposed on the negative electrode current collector, wherein the negative electrode active material layer includes: a graphite-based active material having an average particle diameter (D50) of 5 μm to 50 μm; silicon nanoparticles having an average particle diameter (D50) of 70 nm to 300 nm; a first conductive material; and two or more cellulose-based compounds, wherein each cellulose-based compound has a different weight average molecular weight, a method of forming the negative electrode, and a lithium secondary battery including the negative electrode.