公开(公告)号：US20200152958A1

公开(公告)日：2020-05-14

申请号：US16604334

申请日：2018-11-09

申请人： LG CHEM, LTD.

发明人： Taek Soo LEE ,  Cheolwoo KIM ,  Sang Hoon CHOY

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

摘要： 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：US20190044150A1

公开(公告)日：2019-02-07

申请号：US15759677

申请日：2017-03-24

申请人： LG CHEM, LTD.

发明人： Ye Lin KIM ,  Ki Yeon JO ,  Jung Keun YOO ,  Je Young KIM ,  Sang Hoon CHOY ,  Jong Heon SEOL

IPC分类号： H01M4/62 ,  H01M10/052

摘要： The present invention provides a conductive material dispersed liquid including a conductive material which includes bundle-type carbon nanotubes; a dispersant which includes a hydrogenated nitrile-based rubber; and a dispersion medium, where a complex modulus (|G*| @ 1 Hz) is in a range of 20 to 500 Pa when measured by a rheometer at a frequency of 1 Hz, and a secondary battery manufactured using the same. The conductive material dispersed liquid has a controlled complex modulus to exhibit excellent dispersibility and powder resistance characteristics, and as a result, can greatly improve the output characteristics of batteries.

公开(公告)号：US20180240567A1

公开(公告)日：2018-08-23

申请号：US15747606

申请日：2016-10-17

申请人： LG CHEM, LTD.

发明人： Kyung Yeon KANG ,  Yelin KIM ,  Jihee WOO ,  Seungyong LEE ,  Hyungsik JANG ,  Dong Hyun CHO ,  Sang Hoon CHOY

IPC分类号： H01B1/24 ,  B01F7/08 ,  C04B35/52

摘要： The carbon nanotube pellets according to the present invention are produced by using only a small amount of solvent and have increased apparent density. The present invention can improve the problems of the change of the content generated by scattering of powders and safety issues by using carbon nanotubes in the form of pellet rather than carbon nanotubes in the form of powder in composite materials. And since the density of the pellet form is higher than that of the powder form, transport, transfer and improvement become easier. Therefore, it can be more effectively applied to the manufacturing of composite materials.

公开(公告)号：US20180175439A1

公开(公告)日：2018-06-21

申请号：US15578177

申请日：2016-09-09

申请人： LG CHEM, LTD.

发明人： Kyung Yeon KANG ,  Jong Heon SEOL ,  Ji Hee WOO ,  Ye Lin KIM ,  Dong Hyun CHO ,  Sang Hoon CHOY

IPC分类号： H01M10/052 ,  H01M4/13 ,  H01M4/62 ,  H01M4/583 ,  H01M2/10

摘要： The present invention provides a conductive material for a secondary battery, and a secondary battery containing the same, the conductive material comprising carbon nanotubes, having a secondary structure in which carbon nanotube units having a diameter of 20-150 nm are entangled, having a ratio of true density to bulk density (TD/BD) of 30-120, having a metal content of 50 ppm or less, and having both excellent dispersibility and high purity, thereby being capable of improving, by increasing the conductivity within an electrode, battery performance, particularly, battery performance at room temperature and low temperature when applied to a battery.

公开(公告)号：US20210399278A1

公开(公告)日：2021-12-23

申请号：US17285984

申请日：2020-10-06

申请人： LG CHEM, LTD.

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

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

摘要： 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：US20210234174A1

公开(公告)日：2021-07-29

申请号：US17051689

申请日：2019-08-21

申请人： LG CHEM, LTD.

发明人： Houng Sik YOO ,  Hyeon CHOI ,  Dong Hyun KIM ,  Hyun Sik CHAE ,  Sang Hoon CHOY ,  Hyung Suk CHO

IPC分类号： H01M4/62 ,  C01B32/174 ,  H01M10/0525

摘要： Provided are a conductive material dispersion liquid, and an electrode and a lithium secondary battery manufactured using the same. The conductive material dispersion liquid according to the present invention includes a carbon-based conductive material, a dispersant, and a dispersion medium, wherein the dispersant is a copolymer including a first repeating unit represented by Chemical Formula 1, a second repeating unit represented by Chemical Formula 2, and a third repeating unit represented by Chemical Formula 3, and the dispersion medium is a non-aqueous solvent.

公开(公告)号：US20210083336A1

公开(公告)日：2021-03-18

申请号：US16954427

申请日：2019-05-08

申请人： LG CHEM, LTD.

发明人： Joo Yul BAEK ,  Woo Ha KIM ,  In Seong KIM ,  Jun Muk LIM ,  Sang Hoon CHOY

IPC分类号： H01M10/54 ,  H01M4/36 ,  H01M10/0525

摘要： The present invention relates to a method of reusing a positive electrode material, and more particularly, the method includes: inputting a positive electrode for a lithium secondary battery comprising a current collector, and a positive electrode active material layer formed on the current collector and including a first positive electrode active material, a first binder and a first conducting agent, into a solvent; separating at least a portion of the positive electrode active material layer from the current collector; adding second binder powder to the solvent and performing primary mixing a resulting mixture; and preparing a positive electrode material slurry by adding a second positive electrode active material and a second conducting agent to the solvent and performing secondary mixing a resulting mixture.

公开(公告)号：US20210043938A1

公开(公告)日：2021-02-11

申请号：US16965685

申请日：2019-12-04

申请人： LG CHEM, LTD.

发明人： Shanghao PIAO ,  Hye Lim SHIM ,  Wooha KIM ,  Sang Hoon CHOY

IPC分类号： H01M4/62 ,  H01M4/04 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/02

摘要： Provided is a positive electrode slurry for preparing a positive electrode for a lithium secondary battery, the positive electrode slurry including a positive electrode active material, a conductive material, a binder, overcharge inhibitor, oxalic acid, and a solvent, wherein the overcharge inhibitor is included in an amount of 1 part by weight to 2 parts by weight, based on 100 parts by weight of the total solid content of the positive electrode active material, the conductive material, and the binder of the positive electrode slurry, the oxalic acid is included in an amount of 0.1 part by weight to 0.7 parts by weight, based on 100 parts by weight of the total solid content of the positive electrode active material, the conductive material, and the binder of the positive electrode slurry, and the positive electrode slurry has a viscosity of 4000 cp to 15000 cp at room temperature.

公开(公告)号：US20200161627A1

公开(公告)日：2020-05-21

申请号：US16615373

申请日：2018-11-20

申请人： LG CHEM, LTD.

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

IPC分类号： H01M4/04 ,  H01M4/70 ,  H01M2/26

摘要： 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：US20190051887A1

公开(公告)日：2019-02-14

申请号：US15760066

申请日：2016-08-26

申请人： LG CHEM, LTD.

发明人： Houngsik YOO ,  Jong Won LEE ,  Dong Hyun KIM ,  Gyemin KWON ,  Byoung Hoon AHN ,  Yelin KIM ,  Sang Hoon CHOY ,  Hyeon CHOI ,  Jungkeun YOO

IPC分类号： H01M4/139 ,  C01B32/174 ,  H01M4/04 ,  H01M4/62

摘要： The present disclosure relates to a carbon nanotube dispersion including entangled-type carbon nanotubes, a dispersion medium, and partially hydrogenated nitrile rubber having a residual double bond (RDB) value of 0.5% by weight to 40% by weight calculated according to the following Mathematical Formula 1, wherein dispersed particle diameters of the carbon nanotubes have particle size distribution D50 of 2 μm to 5 μm, a method for preparing the same, and methods for preparing electrode slurry and an electrode using the same.