公开(公告)号：US20180241042A1

公开(公告)日：2018-08-23

申请号：US15846855

申请日：2017-12-19

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Won IL CHO ,  In Wook NAH ,  In Hwan OH ,  Van Dung DO ,  Mun Sek KIM

IPC: H01M4/62 ,  H01M4/134 ,  H01M4/38 ,  H01M4/1395 ,  H01M4/04 ,  H01M10/052 ,  H01M10/0569 ,  H01M10/0568 ,  H01M4/36 ,  C09D4/00

CPC classification number: H01M4/628 ,  C09D4/00 ,  H01M4/0402 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/366 ,  H01M4/38 ,  H01M4/382 ,  H01M10/052 ,  H01M10/054 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/4235 ,  H01M12/08 ,  H01M2004/027 ,  H01M2300/0037 ,  Y02E60/128

Abstract: Functionalized metal oxide nanoparticles which are lithium-terminated sulfonated metal oxide nanoparticles. According to the anode to which lithium-terminated sulfonated metal oxide nanoparticles are introduced as a protective layer, negatively charged sulfonate groups may cause electrostatic repulsion of lithium polysulfides and limit access of lithium polysulfides to a lithium metal anode while reducing the interfacial resistance by lithium fixed to sulfonate groups, inhibit growth of dendrites at a lithium metal anode and perforation of a separator, and the protective layer serves as an artificial solid electrolyte interphase (SEI) layer positioned on the surface of lithium metal and reducing the impedance to charge transfer reaction, thereby increasing the Coulomb efficiency of a lithium-sulfur battery. Thus, it is possible to improve the electrochemical characteristics, such as charge/discharge capacity, life and rate characteristics.

公开(公告)号：US20190280304A1

公开(公告)日：2019-09-12

申请号：US16296158

申请日：2019-03-07

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： WON IL CHO ,  Mun Sek KIM ,  Seung Hun LEE ,  Min Seop KIM ,  Van Dung DO ,  In Wook NAH ,  In Hwan OH

IPC: H01M4/66 ,  H01M4/38 ,  H01M4/131 ,  H01M10/052 ,  C01B32/174

Abstract: The artificial solid electrolyte interphase of an anode for a secondary battery including multi-walled carbon nanotubes to protect an underlying anode material in the form of a thin film. The use of the artificial solid electrolyte interphase enables rapid diffusion and stable deposition of lithium to inhibit the formation of dendrites. In addition, the artificial solid electrolyte interphase prevents side reactions between the lithium metal anode and the electrolyte, achieving good electrochemical stability and high Coulombic efficiency.