公开(公告)号：US11843104B2

公开(公告)日：2023-12-12

申请号：US16464564

申请日：2018-04-26

Applicant: LG CHEM, LTD.

Inventor： Ohbyong Chae ,  Yoonah Kang ,  Junhyuk Song ,  Eun Kyung Kim ,  Sangwook Woo

IPC: H01M4/48 ,  H01M4/04 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/38 ,  H01M4/66 ,  H01M10/052 ,  B05D1/32 ,  C23C14/04 ,  C23C16/04 ,  H01M10/04 ,  H01M10/058 ,  H01M4/02

CPC classification number: H01M4/0421 ,  B05D1/32 ,  C23C14/04 ,  C23C16/04 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/382 ,  H01M4/661 ,  H01M10/04 ,  H01M10/052 ,  H01M10/058 ,  H01M2004/021 ,  H01M2004/027

Abstract: A method for manufacturing a negative electrode for a lithium secondary battery including a patterned lithium metal that homogenizes the electron distribution in the lithium electrode and prevents the growth of the lithium dendrites when driving the lithium secondary battery.

公开(公告)号：US11127949B2

公开(公告)日：2021-09-21

申请号：US16491521

申请日：2018-03-07

Applicant: LG CHEM, LTD.

Inventor： Heewon Choi ,  Eun Kyung Kim ,  Ki Hwan Kim ,  Sangwook Woo ,  Jeong Woo Shon ,  Ohbyong Chae

IPC: H01M4/40 ,  H01M4/04 ,  H01M4/133 ,  H01M4/1393 ,  H01M10/0525 ,  H01M4/02

Abstract: A negative electrode including a lithium metal layer, a lithium nitride thin film layer formed on at least one surface of the lithium metal layer, and a carbon-based thin film layer formed on the lithium nitride thin film layer, a method for preparing the same, and a lithium secondary battery including the same. A lithium nitride thin film layer and a carbon-based thin film layer formed on a lithium metal layer obtains current density distribution uniformly by blocking side reactions caused by a direct contact between the lithium metal layer and an electrolyte as well as increasing a specific surface area of a negative electrode, and enhances cycle performance and reduces an overvoltage by suppressing lithium dendrite formation to improve electrochemical performance of a lithium secondary battery.

公开(公告)号：US10897040B2

公开(公告)日：2021-01-19

申请号：US15780983

申请日：2017-09-29

Applicant: LG CHEM, LTD.

Inventor： Heewon Choi ,  Sangwook Woo ,  Ohbyong Chae ,  Eun Kyung Kim

IPC: H01M4/134 ,  H01M4/38 ,  H01M10/0525 ,  H01M4/62 ,  H01M10/42 ,  H01M4/36 ,  H01M4/02

Abstract: The present invention relates to a negative electrode for a lithium secondary battery having a double protective layer formed therein, and in particular, to a negative electrode for a lithium secondary battery having a polymer protective layer and a carbon-based protective layer formed therein, and a lithium secondary battery including the same. The lithium secondary battery including the negative electrode according to the present invention is capable of enhancing battery performance and exhibiting stable performance by forming a stable lithium fluoride (LiF) layer and thereby preventing a loss of a solid electrolyte interface (SEI) layer. In addition, a cycle life property is enhanced during charge and discharge by absorbing dead lithium or lithium dendrite and thereby preventing an internal short circuit of the battery.

公开(公告)号：US11791456B2

公开(公告)日：2023-10-17

申请号：US16465499

申请日：2018-03-08

Applicant: LG CHEM, LTD.

Inventor： Heewon Choi ,  Eun Kyung Kim ,  Ki Hwan Kim ,  Sangwook Woo ,  Jeong Woo Shon ,  Ohbyong Chae

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

CPC classification number: H01M4/366 ,  H01M4/0426 ,  H01M4/0471 ,  H01M4/134 ,  H01M4/382 ,  H01M4/625 ,  H01M4/628 ,  H01M10/052 ,  H01M2004/027

Abstract: A negative electrode having a carbon-based thin film formed on at least one surface of a lithium metal layer, and a lithium secondary battery including the same. A carbon-based thin film formed on at least one surface of a lithium metal layer blocks side reactions caused by direct contact between the lithium metal layer and an electrolyte as well as increasing a specific surface area of a negative electrode, and thereby suppresses lithium dendrite formation, and by obtaining current density distribution uniformly, enhances cycle performance, reduces an overvoltage to improve electrochemical performance of a lithium secondary battery.

公开(公告)号：US11664485B2

公开(公告)日：2023-05-30

申请号：US16466572

申请日：2018-04-27

Applicant: LG CHEM, LTD.

Inventor： Yoonah Kang ,  Eun Kyung Kim ,  Sangwook Woo

IPC: H01M4/04 ,  H01M4/1391 ,  H01M4/1395 ,  H01M4/38 ,  H01M4/62 ,  H01M4/36 ,  H01M4/48 ,  H01M10/0525 ,  H01M10/0585 ,  H01M50/443 ,  H01M50/489 ,  H01M50/491 ,  H01M4/02

CPC classification number: H01M4/0419 ,  H01M4/0407 ,  H01M4/1391 ,  H01M4/1395 ,  H01M4/366 ,  H01M4/382 ,  H01M4/483 ,  H01M4/622 ,  H01M10/0525 ,  H01M10/0585 ,  H01M50/443 ,  H01M50/489 ,  H01M50/491 ,  H01M2004/027

Abstract: A method for manufacturing a lithium secondary battery including a pre-lithiated negative electrode. A composite of lithium and a negative electrode active material is formed through a lamination process which is a process of manufacturing a battery. In the case of the lithium secondary battery to which the negative electrode having the composite formed by lithium and the negative electrode active material is applied, when the battery starts to operate, the negative electrode active material is pre-lithiated, and thus the charging/discharging process proceeds in the state where the lithium alloy is already formed on the negative electrode, thereby showing an effect of reducing initial irreversible phases.

公开(公告)号：US11677079B2

公开(公告)日：2023-06-13

申请号：US16652546

申请日：2019-07-11

Applicant: LG CHEM, LTD.

Inventor： Ohbyong Chae ,  Sangwook Woo ,  Yeri Kim

IPC: H01M4/64 ,  H01M4/62 ,  C23C18/31 ,  H01M4/04 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/38 ,  H01M10/052 ,  H01M4/02

CPC classification number: H01M4/628 ,  C23C18/31 ,  H01M4/0402 ,  H01M4/0452 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/382 ,  H01M4/626 ,  H01M10/052 ,  H01M2004/021

Abstract: An electrode for a lithium secondary battery, which may be applied to the lithium secondary battery to increase cycling performance and efficiency of the battery, and a manufacturing method thereof. When the electrode for the lithium secondary battery of the present invention is applied to the lithium secondary battery, uniform deposition and stripping of lithium metals occur throughout the surface of the electrode when charging/discharging the battery, thereby inhibiting uneven growth of lithium dendrites and improving cycle and efficiency characteristics of the battery. Further, the electrode for the lithium secondary battery of the present invention exhibits remarkably high flexibility, as compared with existing electrodes including a metal current collector and an active material layer, thereby improving processability during manufacture of the electrode and assembling the battery.

公开(公告)号：US11205797B2

公开(公告)日：2021-12-21

申请号：US16466585

申请日：2018-04-26

Applicant: LG CHEM, LTD.

Inventor： Yoonah Kang ,  Eun Kyung Kim ,  Sangwook Woo

IPC: H01M10/052 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/38 ,  H01M4/485 ,  H01M4/62 ,  H01M4/133

Abstract: A method for manufacturing a negative electrode for a lithium secondary battery. A negative electrode for a lithium secondary battery is manufactured while forming a composite of lithium metal and a negative electrode active material through a rolling process In the case of the lithium secondary battery to which the negative electrode containing such a composite is applied, when the battery starts to operate, the negative electrode active material is pre-lithiated, and thus charging/discharging process proceeds in the state where the lithium alloy is already formed on the negative electrode, thereby showing an effect of reducing initial irreversible phases.