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：US10923725B2

公开(公告)日：2021-02-16

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: H01M4/04 ,  H01M4/62 ,  H01M10/052 ,  H01M4/36 ,  H01M4/1395 ,  H01M4/134 ,  H01M4/38 ,  H01M4/02 ,  B05D5/12 ,  B05D1/02 ,  B05D1/20 ,  B05D1/00 ,  B05D1/28

Abstract: A method for producing an anode for a lithium metal secondary battery includes coating a thin film comprised of Nb2C, Ti2C or Ti3C2 on a substrate; providing a lithium metal electrode; and laminating the thin film to a surface of the lithium metal electrode. Coating is accomplished by providing a dispersion of a powder comprising Nb2C, Ti2C or Ti3C2; and coating the dispersion on the substrate by Langmuir-Blodgett scooping (LBS). The method may further include, prior to providing the dispersion, obtaining the powder by etching a MAX phase structure represented by Formula 1, Formula 2 or Formula 3 below: Nb2AC  (1); Ti2AC  (2); and Ti3AC2  (3), where A is a metal selected from among Group IIIA elements, Group IVA elements, Cd, and combinations thereof. The method may further include, after laminating the thin film, removing the substrate from the thin film.