公开(公告)号：US20210218010A1

公开(公告)日：2021-07-15

申请号：US16769154

申请日：2019-06-25

Applicant: LG CHEM, LTD.

Inventor： Wansoo CHANG ,  Jonghyun CHAE ,  Suhwan KIM ,  Sung Chul LIM

IPC: H01M4/04 ,  H01M10/0525 ,  H01M4/48

Abstract: The present invention discloses an electrochemical pretreatment method of a vanadium positive electrode for a lithium secondary battery, which can improve the lifetime characteristics of the positive electrode and the battery by inhibiting the leaching of vanadium when charging/discharging the lithium secondary battery using vanadium oxide (V2O5) as a positive electrode, and a vanadium positive electrode for a lithium secondary battery pretreated thereby. The electrochemical pretreatment method of the vanadium positive electrode for a lithium secondary battery comprises a) a step of discharging the lithium free vanadium positive electrode at a voltage of 1.9 V or more; b) an electrochemical pretreatment step of maintaining the discharged vanadium positive electrode at an onset potential value or a potential value having a maximum current through a potentiostat; and c) a step of charging/discharging the pretreated vanadium positive electrode at a voltage range of 2.1 to 4.0V.

公开(公告)号：US20190386340A1

公开(公告)日：2019-12-19

申请号：US16487725

申请日：2018-09-21

Applicant: LG CHEM, LTD. ,  POSTECH ACADEMY-INDUSTRY FOUNDATION

Inventor： Daeil KIM ,  Moon Jeong PARK ,  Jonghyun CHAE ,  Yeonju LEE ,  Lucia KIM ,  Ha Young JUNG ,  Gyuha JO

IPC: H01M10/0565 ,  H01M10/052 ,  C08G65/333 ,  C08G65/335

Abstract: A polymer electrolyte including a poly(ethylene oxide) (PEO) containing polymer; and a lithium salt, wherein a terminal of the poly (ethylene oxide) containing polymer is substituted with a sulfur compound functional group, a nitrogen compound functional group or a phosphorus compound functional group, and a method for preparing the same and a battery containing the same.

公开(公告)号：US20210091410A1

公开(公告)日：2021-03-25

申请号：US16954836

申请日：2019-07-24

Applicant: LG CHEM, LTD. ,  POSTECH ACADEMY-INDUSTRY FOUNDATION

Inventor： Daeil KIM ,  Moon Jeong PARK ,  Jonghyun CHAE ,  Ha Young JUNG ,  Suhwan KIM ,  Sung Chul LIM ,  Jihoon AHN

IPC: H01M10/0565 ,  H01M10/0525 ,  C08G65/335 ,  C08G65/333

Abstract: A polymer electrolyte is provided, which includes a polymer including an ethylene oxide unit; and a lithium salt, wherein the terminal of the polymer is substituted with one to four functional groups selected from the group consisting of a nitrogen compound functional group and phosphorus compound functional group, and the terminal of the polymer and the one to four functional groups are linked by one selected from the group consisting of a C2 to C20 alkylene linker, a C2 to C20 ether linker, and a C2 to C20 amine linker. A method for preparing the same is also provided.

公开(公告)号：US20210028488A1

公开(公告)日：2021-01-28

申请号：US17040495

申请日：2019-07-03

Applicant: LG CHEM, LTD.

Inventor： Jehoon LEE ,  Lucia KIM ,  Dong Hyeop HAN ,  Jonghyun CHAE ,  Wansoo CHANG

IPC: H01M10/0565 ,  C08F293/00 ,  H01M10/0525

Abstract: A polymer electrolyte and a method for manufacturing the same are disclosed. More specifically, a polymer electrolyte membrane having excellent ionic conductivity and low crosslinking degree can be prepared using a crosslinkable reversible addition fragmentation chain transfer polymerization agent (RAFT agent).

公开(公告)号：US20190280332A1

公开(公告)日：2019-09-12

申请号：US16330795

申请日：2018-04-13

Applicant: LG CHEM, LTD.

Inventor： Seungha KIM ,  Youngcheol CHOI ,  Jonghyun CHAE ,  Kyoung Hoon KIM ,  Yeonju LEE ,  Daeil KIM ,  Lucia KIM

IPC: H01M10/0565 ,  H01M10/052 ,  H01M10/42 ,  C07C309/65 ,  C07C309/63 ,  C07D333/36 ,  C07D333/48

Abstract: A polymer solid electrolyte having high ion conductivity and interfacial stability. By the polymer solid electrolyte comprising an additive having excellent reachability to a positive electrode surface, and properties of facilitating film formation in a positive electrode due to low oxidation potential, a film is readily formed on the positive electrode surface, and as a result, a lithium secondary battery having enhanced performance may be provided.

公开(公告)号：US20210328214A1

公开(公告)日：2021-10-21

申请号：US17285316

申请日：2020-03-06

Applicant: LG CHEM, LTD. ,  POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION

Inventor： Jangbae KIM ,  Soojin PARK ,  Jaegeon RYU ,  Jonghyun CHAE ,  Jihye YANG

IPC: H01M4/38 ,  H01M4/134 ,  C01B33/023

Abstract: A sulfur-doped silicon negative electrode material, a preparation method for a sulfur-doped silicon negative electrode material, a negative electrode for a lithium secondary battery comprising the sulfur-doped silicon negative electrode material, and a lithium secondary battery comprising the negative electrode, wherein the sulfur-doped silicon negative electrode material has an internal pore channel having an average width of 500 nm to 3 μm and an average external diameter of 1 μm to 5 μm.

公开(公告)号：US20200381716A1

公开(公告)日：2020-12-03

申请号：US16766488

申请日：2018-10-25

Applicant: LG CHEM, LTD.

Inventor： Sung Chul LIM ,  Jonghyun CHAE ,  Suhwan KIM

IPC: H01M4/485 ,  H01M10/0525 ,  C01G45/12

Abstract: A positive electrode material for lithium secondary batteries capable of easily doping vanadium oxide with molybdenum, and a method of manufacturing the same are disclosed. The method of manufacturing a positive electrode material for lithium secondary batteries includes (a) reacting vanadium oxide with a water-soluble molybdenum-based compound in the presence of a solvent; and (b) thermally treating the reaction product of (a).

公开(公告)号：US20200235427A1

公开(公告)日：2020-07-23

申请号：US16305163

申请日：2018-05-30

Applicant: LG CHEM, LTD.

Inventor： Daeil KIM ,  Jonghyun CHAE ,  Yeonju LEE

IPC: H01M10/0565 ,  H01M10/0525 ,  H01M10/0562 ,  H01M4/131 ,  H01M4/60 ,  H01M4/62 ,  H01M4/137

Abstract: The present invention relates to a polymer electrolyte of a multi-layer structure and an all solid-state battery comprising the same, wherein the polymer electrolyte can exhibit an effect capable of stably operating in the high voltage positive electrode and in the low voltage negative electrode, when using the polymer solid electrolyte having a multi-layer structure, which includes the first polymer electrolyte layer and the second polymer electrolyte layer of the present invention, and the all solid-state battery containing it is applicable in the battery field of electric vehicle in which high capacity and high-power battery are used.

公开(公告)号：US20200212484A1

公开(公告)日：2020-07-02

申请号：US16646982

申请日：2018-07-20

Applicant: LG CHEM, LTD.

Inventor： Sujee KWON ,  Jeongae YOON ,  Sung Soo YOON ,  Kyung Oh KIM ,  Jonghyun CHAE ,  Yeonju LEE ,  Daeil KIM ,  Lucia KIM ,  Jongheon KWAK

IPC: H01M10/0565 ,  H01M10/0525 ,  H01M10/0562 ,  H01M10/0563

Abstract: A solid electrolyte composition for a lithium secondary battery including a fluorine-based polymer having grafted thereon a unit comprising alkylene oxide group and a crosslinkable functional group. The polymer may be formed by a process including grafting a monomer on a fluorine-based polymer, where the monomer includes alkylene oxide group and a crosslinkable functional group. Also disclosed is a solid electrolyte for a secondary battery formed by thermally curing the composition. By graft copolymerizing a monomer including alkylene oxide group and a crosslinkable functional group on a fluorine-based polymer having high lithium ion conductivity, the solid electrolyte is capable of providing a solid electrolyte for a secondary battery having significantly enhanced solid electrolyte ion conductivity and electrochemical stability.

公开(公告)号：US20210066751A1

公开(公告)日：2021-03-04

申请号：US16958426

申请日：2019-01-11

Applicant: LG CHEM, LTD.

Inventor： Daeil KIM ,  Jonghyun CHAE

IPC: H01M10/0565 ,  H01M10/0525 ,  C08F290/14

Abstract: A solid polymer electrolyte and a method of manufacturing the same are provided. More particularly, a solid polymer electrolyte having a high content of solids and exhibiting a flame retardant property and a method of manufacturing the same, wherein the solid polymer electrolyte includes a multifunctional acrylate-based polymer, a C2 to C10 polyalkylene oxide, a lithium salt and a non-aqueous solvent and wherein the multifunctional acrylate-based polymer is cross-linked with the polyalkylene oxide to form a semi-interpenetrating polymer network (semi-IPN).