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：US20220002158A1

公开(公告)日：2022-01-06

申请号：US17281455

申请日：2019-11-08

Applicant: LG CHEM, LTD.

Inventor： Seungbo YANG ,  Kwonnam SOHN ,  Suenghoon HAN ,  Jangsoo LEE

IPC: C01B32/198 ,  H01M10/052

Abstract: A holey thermally expanded-reduced graphene oxide having high specific surface area and pore volume including pores on the surface, a method for preparing the same, and a sulfur-carbon composite and a lithium secondary battery including the same.

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.