公开(公告)号：US20180269453A1

公开(公告)日：2018-09-20

申请号：US15846819

申请日：2017-12-19

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Won Il Cho ,  Mun Sek Kim ,  In Wook Nah ,  Young Rok Lim ,  Sun Min Park ,  In Hwan Oh

IPC: H01M2/16 ,  H01M2/14 ,  H01M10/0525 ,  H01M10/054 ,  H01M12/06 ,  C09D179/02 ,  C09D5/24 ,  C08G73/02

CPC classification number: H01M2/1686 ,  C08G73/0206 ,  C09D5/24 ,  C09D5/44 ,  C09D7/65 ,  C09D179/02 ,  H01M2/145 ,  H01M2/1613 ,  H01M2/1646 ,  H01M2/1653 ,  H01M10/0525 ,  H01M10/054 ,  H01M12/06 ,  H01M2220/30 ,  Y02E60/128

Abstract: A polyethyleneimine-attached carbonaceous material for a separator for a secondary battery. The carbonaceous material for coating a separator for a secondary battery adsorbs lithium polysulfides (LiPS) to inhibit a shuttling reaction between an anode and a cathode, caused by the dissolution of lithium polysulfides in electrolyte, and increases recyclability of lithium polysulfides, resulting in improvement of life characteristics and rate characteristics of a battery.

公开(公告)号：US10727466B2

公开(公告)日：2020-07-28

申请号：US15846819

申请日：2017-12-19

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Won Il Cho ,  Mun Sek Kim ,  In Wook Nah ,  Young Rok Lim ,  Sun Min Park ,  In Hwan Oh

IPC: H01M2/16 ,  C08G73/02 ,  H01M2/14 ,  H01M10/054 ,  H01M12/06 ,  C09D179/02 ,  C09D5/24 ,  H01M10/0525 ,  C09D5/44 ,  C09D7/65

Abstract: In a secondary battery including a separator, the improvement includes a coating layer that is disposed on the separator and that comprises a polyethyleneimine-attached carbonaceous material The secondary battery may include an adhesive buffer layer provided between the separator and the coating layer which imparts adhesion force between the separator and the coating layer. The carbonaceous material adsorbs lithium polysulfides (LiPS) in use to inhibit a shuttling reaction between the anode and the cathode, caused by the dissolution of lithium polysulfides in the electrolyte, and increases recyclability of the lithium polysulfides, resulting in improvement of life characteristics and rate characteristics of the secondary battery.