公开(公告)号：US20190027740A1

公开(公告)日：2019-01-24

申请号：US16069730

申请日：2017-09-27

Applicant: LG CHEM, LTD.

Inventor： Taek Soo LEE ,  Chang Wan KOO ,  Sang Hoon CHOI ,  Jung Min YANG ,  Il Jae MOON

IPC: H01M4/36 ,  H01M4/04 ,  H01M4/62

Abstract: Disclosed are a multi-layer negative electrode and a lithium secondary battery including the same. The multi-layer negative electrode includes: a current collector configured to transmit electrons between an outer lead and a negative electrode active material; a first negative electrode mixture layer formed on one surface or both surfaces of the current collector and including a first negative electrode active material and a first binder; and a second negative electrode mixture layer formed on the first negative electrode mixture layer and including a second negative electrode active material, wherein the first negative electrode mixture layer has an electrode density of about 0.9 to 2.0 g/cc and the second negative electrode mixture layer has an electrode density of about 0.2 to 1.7 g/cc, which is a range lower than that of the electrode density of the first negative electrode mixture layer.

公开(公告)号：US20200152958A1

公开(公告)日：2020-05-14

申请号：US16604334

申请日：2018-11-09

Applicant: LG CHEM, LTD.

Inventor： Taek Soo LEE ,  Cheolwoo KIM ,  Sang Hoon CHOY

IPC: H01M4/04 ,  B26F1/12 ,  H01M4/62 ,  H01M4/139 ,  H01M4/131 ,  H01M4/66 ,  H01M10/0585

Abstract: A method of manufacturing an irregular electrode includes forming a first electrode line by continuously coating a first electrode slurry on a metal sheet, forming at least one second electrode line formed with a dotted line shape including uncoated portions positioned in parallel to the first electrode line by intermittently coating a second electrode slurry on the metal sheet that does not overlap the first electrode line, and forming the irregular electrode by notching the metal sheet with an irregular shape including the second electrode line and the first electrode line except for the uncoated portions of the at least one second electrode line.

公开(公告)号：US20210399278A1

公开(公告)日：2021-12-23

申请号：US17285984

申请日：2020-10-06

Applicant: LG CHEM, LTD.

Inventor： Taek Soo LEE ,  Sang Hoon CHOY ,  Ki Tae KIM ,  Cheol Woo KIM ,  Young Joon JO

IPC: H01M4/139 ,  H01M4/04 ,  H01M4/62

Abstract: The present invention relates to an electrode slurry coating device and method, wherein the heights of first and second slot die heads for discharging active material can be controlled according to time to improve process efficiency and reduce defect rates when forming an active material layer having a double layer structure.

公开(公告)号：US20210296640A1

公开(公告)日：2021-09-23

申请号：US17262068

申请日：2020-04-02

Applicant: LG CHEM, LTD.

Inventor： Jihee YOON ,  Taek Soo LEE ,  Sang Hoon CHOY ,  Cheolwoo KIM

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

Abstract: Provided is an electrode for a lithium secondary battery having excellent resistance and output characteristics while achieving high capacity characteristics due to a high active material content.

公开(公告)号：US20200044230A1

公开(公告)日：2020-02-06

申请号：US16494969

申请日：2018-10-22

Applicant: LG CHEM, LTD.

Inventor： Jin Young SON ,  Moo Yong SHIN ,  Sang Hoon CHOY ,  Jung Min YANG ,  Taek Soo LEE ,  Do Hyun LEE ,  Chan Soo JUN ,  Cheol Woo KIM

IPC: H01M4/04 ,  H01M4/139 ,  B21D28/02

Abstract: A method for manufacturing an electrode for a rechargeable battery includes, with reference to a center axis that divides a metal sheet left and right, setting a first coating line that is parallel with the center axis at a location deflected to one side, and a second coating line that is parallel with the center axis at a location deflected to the other side so as to correspond to the first coating line with reference to the virtual center axis and coating an electrode slurry on the metal sheet while alternately moving a slot die to the first coating line and the second coating line.

公开(公告)号：US20200161627A1

公开(公告)日：2020-05-21

申请号：US16615373

申请日：2018-11-20

Applicant: LG CHEM, LTD.

Inventor： Taek Soo LEE ,  Jung Min YANG ,  Sang Hoon CHOY ,  Cheol Woo KIM

IPC: H01M4/04 ,  H01M4/70 ,  H01M2/26

Abstract: A method for manufacturing an electrode having an irregular shape through a simple process while minimizing the amount of wasted electrode active material is provided. The method results in first to third coating areas formed to be spaced apart from each other on a collector, a plurality of fourth coating areas formed between the first coating area and the second coating area, and a plurality of fifth coating areas formed between the second coating area and the third coating area. The plurality of fourth coating areas and the plurality of fifth coating areas are dislocated from each other when viewed from one side in a width direction of the collector.

公开(公告)号：US20190305308A1

公开(公告)日：2019-10-03

申请号：US16063837

申请日：2017-09-27

Applicant: LG CHEM, LTD.

Inventor： Taek Soo LEE ,  Chang Wan KOO ,  Sang Hoon CHOI ,  Jung Min YANG ,  Il Jae MOON

IPC: H01M4/587 ,  H01M4/133 ,  H01M10/0525 ,  H01M4/62

Abstract: The present disclosure relates to a multilayer negative electrode comprising a negative electrode current collector configured to transfer electrons between an outer lead and a negative electrode active material, a first negative electrode mixture layer formed on one surface or both surfaces of the current collector and containing natural graphite as a negative electrode active material and a second negative electrode mixture layer formed on the first negative electrode mixture layer and containing artificial graphite as a negative electrode active material, and a lithium secondary battery including the same.

公开(公告)号：US20170338468A1

公开(公告)日：2017-11-23

申请号：US15538042

申请日：2016-01-13

Applicant: LG Chem, Ltd.

Inventor： Ji Yeon KIM ,  Taek Soo LEE ,  Jun Soo PARK ,  Sang Hoon CHOY

IPC: H01M4/139 ,  H01M10/0525 ,  H01M4/62

CPC classification number: H01M4/139 ,  H01M4/0404 ,  H01M4/623 ,  H01M4/624 ,  H01M10/0525

Abstract: Provided are a method of preparing a composition for forming a positive electrode of a lithium secondary battery which includes preparing a first dispersed solution by primary dispersion of a conductive agent and a dispersant in a solvent, preparing a second dispersed solution by adding binder powder to the first dispersed solution and performing secondary dispersion, and adding and mixing a positive electrode active material to the second dispersed solution, and a positive electrode and a lithium secondary battery which are prepared by using the composition.A composition for forming a positive electrode of a lithium secondary battery, which has improved dispersibility, may be prepared by the above method, and internal resistance of the battery may be reduced and output characteristics may be improved when a positive electrode is prepared by using the composition.