公开(公告)号：US20190267630A1

公开(公告)日：2019-08-29

申请号：US16285680

申请日：2019-02-26

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： WON IL CHO ,  Mun Sek KIM ,  Ji Hyun RYU ,  Seung Hun LEE

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

Abstract: The aim of the present invention is to provide an electrolyte system for prolonging the life of lithium metal anode-based secondary batteries while maintaining the energy density of the batteries. The ultimate aim of the present invention is to use lithium metal in combination with cathodes, such as transition metal oxide, sulfur, and air electrodes, that are currently used in lithium ion batteries for future unmanned electric vehicles and grid energy storage systems as well as in lithium metal secondary batteries with high energy density. The use of lithium metal is also expected to contribute to the development of newly emerging unmanned aircrafts such as drones. The present invention is expected to be globally competitive in the secondary battery and electrochemical capacitor industries. Research on the safety of high density energy materials, particularly when handled, is attracting a great deal of researchers' attention because high energy density is achieved at the sacrifice of safety in the commercialization of products. Due to the social and technological criticism associated with the recent explosion of smartphones, it is particularly necessary to ensure safety of batteries with high energy density. Particularly, next-generation batteries have energy densities at least substantially two times to a maximum of eight times higher than existing lithium ion batteries. For this reason, next-generation batteries and systems using next-generation batteries should be necessarily investigated and verified for safety. Therefore, the present invention provides a method for forming a Mxene thin film as a stable SEI film that can stabilize a lithium metal anode of a lithium metal secondary battery that may catch fire or explode and can suppress the formation and diffusion of lithium dendrites to prevent the occurrence of an internal short circuit.

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.