公开(公告)号：US20210242534A1

公开(公告)日：2021-08-05

申请号：US17052918

申请日：2019-10-25

Applicant: LG CHEM, LTD.

Inventor： Kihyun KIM ,  Seungbo YANG ,  Jangsoo LEE

IPC: H01M50/431 ,  H01M50/403 ,  H01M10/0525 ,  H01M50/449

Abstract: A functional separator capable of improving the capacity and lifetime of a battery by coating a material capable of reducing lithium polysulfide on a separator surface in order to resolve the problems caused by leaching of lithium polysulfide, a preparation method thereof and a lithium secondary battery including the same. The functional separator includes a base separator; a conductive carbon layer on the surface of the base separator; and a metal oxide formed on at least one of an interior and the surface of the conductive carbon layer.

公开(公告)号：US20220037650A1

公开(公告)日：2022-02-03

申请号：US17298871

申请日：2020-05-29

Applicant: LG CHEM, LTD.

Inventor： Soohyun KIM ,  Jangsoo LEE ,  Kihyun KIM

IPC: H01M4/36 ,  H01M10/0525 ,  H01M10/36 ,  H01M4/583 ,  H01M4/60 ,  H01M4/133 ,  H01M4/04

Abstract: Disclosed is a carbon product, including a carbon material, and a redox functional group-containing polymer layer on a surface of the carbon material, as well as a sulfur-carbon composite containing the same, and a lithium secondary battery containing the same. More specifically, since the redox functional group-containing polymer functions to promote the reduction of lithium polysulfide, when the carbon material having the redox functional group-containing polymer layer formed or the sulfur-carbon composite is applied as a positive electrode material for a lithium secondary battery, the performance of the battery may be improved.

公开(公告)号：US20210359299A1

公开(公告)日：2021-11-18

申请号：US16968191

申请日：2019-07-25

Applicant: LG CHEM, LTD.

Inventor： Kihyun KIM ,  Kyung Oh KIM ,  Yeyoung HA

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

Abstract: A lithium electrode and a lithium secondary battery the same are disclosed. More specifically, a lithium electrode is disclosed that can increase the lifetime of the battery by providing a protective layer containing a copolymer containing an acetal functional group forming a stable SEI layer through a chemical reaction with lithium metal and a fluorine-based functional group capable of forming a LiF-rich SEI layer on the surface of the lithium metal to inhibit the formation of lithium dendrite and inhibit the side reaction of lithium metal and electrolyte solution.

公开(公告)号：US20210143510A1

公开(公告)日：2021-05-13

申请号：US16624750

申请日：2018-05-04

Applicant: LG CHEM, LTD.

Inventor： Kihyun KIM ,  Soohyun KIM ,  Doo Kyung YANG ,  Sun Mi JIN ,  Changhoon LEE

IPC: H01M50/446 ,  H01M10/052 ,  H01M10/058 ,  H01M50/403 ,  H01M50/46

Abstract: A lithium-sulfur battery comprising a separator in which an adsorption layer including a radical compound having a nitroxyl radical site is formed, and in particular, to a lithium-sulfur battery suppressing elution of lithium polysulfide by using an adsorption layer including a radical compound having a nitroxyl radical site and optionally a conductive material on at least one surface of a separator. In the lithium-sulfur battery, elution and diffusion may be prevented by a radical compound having a nitroxyl radical site, a stable radical compound, adsorbing lithium polysulfide eluted from positive electrode, and in addition thereto, electrical conductivity is further provided to provide a reaction site of a positive electrode active material, and as a result, battery capacity and lifetime properties are enhanced.

公开(公告)号：US20210273296A1

公开(公告)日：2021-09-02

申请号：US16972524

申请日：2020-04-28

Applicant: LG CHEM, LTD.

Inventor： Kihyun KIM ,  Seungbo YANG

IPC: H01M50/446 ,  H01M50/403 ,  H01M10/0525 ,  H01M50/449

Abstract: A functional separator capable of improving the capacity and lifetime of a battery by coating a material capable of reducing lithium polysulfide on the surface of the separator, a method for manufacturing the same, and a lithium secondary battery including the same. The functional separator includes a base separator and a polyethylene oxide-conductive carbon composite layer present on the surface of the base separator.

公开(公告)号：US20170114197A1

公开(公告)日：2017-04-27

申请号：US15318166

申请日：2015-06-12

Applicant: LG CHEM, LTD. ,  SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION

Inventor： Seong Ho CHOI ,  Jong-Chan LEE ,  Hyuk KIM ,  Doyoung KIM ,  Ji Hun KIM ,  Taeyun KO ,  Bo-Kyung JUNG ,  Kihyun KIM

IPC: C08J5/22 ,  H01M8/1051 ,  H01M8/1032 ,  H01M8/1048 ,  C08K9/10 ,  C08G75/23

CPC classification number: C08J5/2275 ,  C08G75/23 ,  C08J5/22 ,  C08J2381/06 ,  C08K9/10 ,  C08L81/06 ,  H01M8/1032 ,  H01M8/1048 ,  H01M8/1051 ,  H01M2008/1095 ,  Y02P70/56

Abstract: The present application relates to a composite electrolyte membrane and a method for manufacturing the same. The composite electrolyte membrane according to the present application includes: a poly(arylene ether sulfone) copolymer including the repeating unit represented by Chemical Formula 1 and the repeating unit represented by Chemical Formula 2; and a core-shell particle including an inorganic particle core and a basic organic polymer shell.

公开(公告)号：US20220006131A1

公开(公告)日：2022-01-06

申请号：US17289090

申请日：2020-04-28

Applicant: LG CHEM, LTD.

Inventor： Kihyun KIM ,  Minsu KIM

IPC: H01M10/42 ,  H01M50/431 ,  H01M50/411 ,  H01M50/403 ,  H01M50/449 ,  H01M10/052

Abstract: In order to solve the problems caused by lithium polysulfide leaching from the positive electrode, disclosed is a catalytic site-introduced functional separator, a method of manufacturing the same, and a lithium secondary battery including the same, which can improve the capacity and lifetime of the battery by coating a material, which can act as a reduction catalyst for lithium polysulfide, on the surface of the separator. The catalytic site-introduced functional separator includes a base separator and a catalytic site-containing coating layer located on the surface of the base separator.

公开(公告)号：US20190319272A1

公开(公告)日：2019-10-17

申请号：US16470166

申请日：2018-03-13

Applicant: LG CHEM, LTD.

Inventor： Kihyun KIM ,  Doo Kyung YANG ,  Taek Gyoung KIM ,  Jieun SONG

IPC: H01M4/62 ,  H01M4/36 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/38 ,  H01M10/052 ,  H01M4/04

Abstract: A lithium electrode and a lithium secondary battery including the same, and in particular, to a lithium electrode including a lithium metal layer; and a surface treatment layer formed on the lithium metal layer, wherein the surface treatment layer includes a surface treatment compound including a functional group capable of bonding with lithium metal and a hydrocarbon group substituted with one or more fluorine. By being provided with a surface treatment layer including a specific functional group, the lithium electrode improves stability of lithium metal as well as suppressing side reactions on the surface, and thereby allows high capacity, high stability and long lifetime of a lithium secondary battery.

公开(公告)号：US20210288380A1

公开(公告)日：2021-09-16

申请号：US17262527

申请日：2020-04-28

Applicant: LG CHEM, LTD.

Inventor： Kihyun KIM ,  Jangsoo LEE ,  Seungbo YANG ,  Soohyun KIM ,  Minsu KIM

IPC: H01M50/403 ,  H01M10/0525 ,  H01M4/38 ,  H01M50/411 ,  H01M50/431 ,  H01M50/449

Abstract: In order to solve the problem caused by leaching of lithium polysulfide, disclosed is a functional separator, a method of manufacturing the same, and a lithium secondary battery including the same, which can improve the capacity and life of the battery by coating a material capable of reducing lithium polysulfide on the separator surface. The functional separator includes a base separator; and a redox active polymer-conductive carbon composite layer on a surface of the base separator.

公开(公告)号：US20210226252A1

公开(公告)日：2021-07-22

申请号：US16768982

申请日：2019-05-10

Applicant: LG CHEM, LTD.

Inventor： Yeyoung HA ,  Kihyun KIM ,  Doo Kyung YANG

IPC: H01M10/0567 ,  H01M10/0569 ,  H01M10/052 ,  H01M50/417 ,  H01M10/0568 ,  H01M4/38 ,  H01M4/02

Abstract: An electrolyte for a lithium secondary battery and a lithium secondary battery including the same, and more specifically, an electrolyte for a lithium secondary battery that can uniformly maintain a lithium ion concentration on the surface of a lithium metal negative electrode to inhibit the growth of lithium dendrites, even if a small amount of an additive comprising a functional group forming a bond with lithium metal and a polyethylene oxide chain interacting with lithium ion is contained.