公开(公告)号：US10923726B2

公开(公告)日：2021-02-16

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 ,  H01M4/02

Abstract: An artificial solid electrolyte interphase (ASEI) of an anode for a secondary battery includes a first film composed of amino-functionalized, reduced graphene oxide (rGO) that is amino-functionalized by binding with polyethyleneimine present in an amount of from 1 to 50% by weight, based on total weight of the amino-functionalized, reduced graphene oxide (rGO) and that is disposed in contact with an anode material to protect the anode material; and a second film comprised of amino-functionalized, multi-walled carbon nanotubes that is amino-functionalized by binding with polyethyleneimine and that is stacked on the first film. An anode of a secondary battery including the ASEI enables rapid diffusion and stable deposition of lithium to inhibit the formation of dendrites. In a secondary battery including the anode, the ASEI prevents side reactions between a lithium metal anode and the electrolyte, achieving good electrochemical stability and high Coulombic efficiency.

公开(公告)号：US10658670B2

公开(公告)日：2020-05-19

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 ,  H01M10/0569 ,  H01M10/0568 ,  H01M4/36 ,  C09D4/00 ,  H01M10/052 ,  H01M10/054 ,  H01M12/08 ,  H01M10/42 ,  H01M4/02

Abstract: An anode includes a thin film of an anode material; and a protective layer that is formed on the thin film of the anode material, that is composed of functionalized metal oxide nanoparticles, which are lithium-terminated sulfonated metal oxide nanoparticles, and that has a thickness of 300-5000 nm. A method for manufacturing the anode includes dispersing the functionalized metal oxide nanoparticles into a dispersion medium to form a dispersion; dipping a substrate into water, and introducing the dispersion thereto so that the functionalized metal oxide nanoparticles form a self-assembled molecular film on the water surface; lifting the substrate over the water surface to transfer the self-assembled molecular film onto the substrate, thereby providing a substrate coated with a functionalized metal oxide film; and transferring the functionalized metal oxide film onto the thin film of the anode material to provide an anode coated with the functionalized metal oxide film.