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：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：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：US20160233475A1

公开(公告)日：2016-08-11

申请号：US15029723

申请日：2014-09-29

Applicant: LG CHEM, LTD.

Inventor： Byoungkuk SON ,  Seong Ho LEE ,  Minchul JANG ,  Hyungsam CHOI ,  Joong Jin HAN ,  Min Seo KIM ,  Suhwan KIM ,  Seungpyo JEONG ,  Yu Mi KIM ,  Da Young SUNG ,  Youngjea KIM ,  Gi Su PARK

IPC: H01M2/16 ,  H01M4/136 ,  H01M4/134 ,  H01M10/0568 ,  H01M4/62 ,  H01M4/66 ,  H01M10/0569 ,  H01M10/0525 ,  H01M4/38

CPC classification number: H01M2/1686 ,  H01M2/145 ,  H01M2/1646 ,  H01M2/1653 ,  H01M2/166 ,  H01M4/0404 ,  H01M4/134 ,  H01M4/136 ,  H01M4/1397 ,  H01M4/38 ,  H01M4/382 ,  H01M4/5815 ,  H01M4/623 ,  H01M4/625 ,  H01M4/661 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/058 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/20

Abstract: The present application relates to a separation membrane and a lithium-sulfur battery including the same, and the separation membrane according to the present application prevents elution of lithium polysulfide in a cathode and suppresses growth of a lithium dendrite generated in an anode, and thus has an effect that a life-span and safety of the battery are improved.

Abstract translation: 本申请涉及一种分离膜和包含该分离膜的锂 - 硫电池，根据本申请的分离膜防止了阴极中多硫化锂的洗脱，并抑制了在阳极中产生的锂枝晶的生长，因此具有 影响电池寿命和安全性的提高。

公开(公告)号：US20210028439A1

公开(公告)日：2021-01-28

申请号：US17042805

申请日：2019-08-22

Applicant: LG CHEM, LTD.

Inventor： Daeil KIM ,  Jonghyun CHAE ,  Suhwan KIM ,  Sung Chul LIM ,  Jihoon AHN

IPC: H01M4/131 ,  H01M4/134 ,  H01M4/36 ,  H01M4/04 ,  H01M10/0525

Abstract: A solid polymer electrolyte and a method for preparing the solid polymer electrolyte are disclosed. More particularly, a solid polymer electrolyte including a multifunctional acrylate-based polymer, a C1 to C10 polyalkylene oxide, a flame-retardant polymer, a lithium salt, and a non-aqueous solvent, wherein the multifunctional acrylate-based polymer is cross-linked with the polyalkylene oxide to form semi-interpenetrating polymer networks (semi-IPN), and the flame-retardant polymer is present blended with the semi-interpenetrating polymer networks of the multifunctional acrylate-based polymer and the polyalkylene oxide, which shows high solid content and flame-retardant characteristics, and a method for preparing the same.

公开(公告)号：US20170092936A1

公开(公告)日：2017-03-30

申请号：US15311945

申请日：2015-06-10

Applicant: LG CHEM, LTD.

Inventor： Minchul JANG ,  Jeong Kyu KIM ,  Yoo Seok KIM ,  Suhwan KIM ,  Jinhyoung YOO ,  Da Young SUNG

IPC: H01M4/36 ,  H01M4/62 ,  H01M4/587

CPC classification number: H01M4/364 ,  C01B32/168 ,  H01M4/386 ,  H01M4/587 ,  H01M4/62 ,  H01M2004/027 ,  H01M2220/30

Abstract: The present specification relates to a silicon-carbon composite, a negative electrode including the same, a secondary battery using the silicon-carbon composite, and a method for preparing the silicon-carbon composite.