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：US10804567B2

公开(公告)日：2020-10-13

申请号：US15975016

申请日：2018-05-09

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Won Il Cho ,  Mun Sek Kim ,  Ji Hyun Ryu ,  In Wook Nah ,  Min Seop Kim ,  Sun Min Park

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/38 ,  H01M10/0568 ,  H01M10/052 ,  H01M4/02 ,  H01M4/525 ,  H01M4/505 ,  H01M4/58

Abstract: Disclosed is an electrolyte for a lithium metal secondary battery and a lithium metal secondary battery including the same. An electrolyte system is intended to maintain the energy density of a secondary battery based on a lithium metal negative electrode and to extend the life of a battery. Particularly, an electrolyte for a lithium metal battery which forms a stable SEI film capable of inhibiting formation and extension of lithium dendrite so that the negative electrode of a lithium metal battery having a high possibility of battery ignition may be stabilized and an internal short-circuit may be prevented, and a lithium metal secondary battery including the same is provided.

公开(公告)号：US10243197B2

公开(公告)日：2019-03-26

申请号：US15442908

申请日：2017-02-27

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY ,  Cornell University

Inventor： Won Il Cho ,  Mun Sek Kim ,  In Wook Nah ,  Min Seop Kim ,  Lynden A. Archer ,  Snehashis Choudhury ,  Zhengyuan Tu

IPC: H01M4/02 ,  H01M4/04 ,  H01M4/36 ,  H01M4/38 ,  H01M4/62 ,  H01M4/134 ,  H01M4/583 ,  H01M10/052 ,  H01M4/1395

Abstract: Provided is a lithium metal anode comprising a Langmuir-Blodgett films as an artificial solid electrolyte interface layer, a lithium metal battery comprising the same, and a preparation method thereof. Various ultra-thin film layers made of carbon and ceramic are formed on the surface of the LiM to serve as a stable artificial SEI layer and suppress formation and perforation of lithium dendrite and side reactions.

公开(公告)号：US20180331393A1

公开(公告)日：2018-11-15

申请号：US15975016

申请日：2018-05-09

Applicant: Korea Institute of Science and Technology

Inventor： Won Il CHO ,  Mun Sek Kim ,  Ji Hyun Ryu ,  In Wook Nah ,  Min Seop Kim ,  Sun Min Park

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/38 ,  H01M4/525 ,  H01M10/0568

Abstract: Disclosed is an electrolyte for a lithium metal secondary battery and a lithium metal secondary battery including the same. An electrolyte system is intended to maintain the energy density of a secondary battery based on a lithium metal negative electrode and to extend the life of a battery. Particularly, an electrolyte for a lithium metal battery which forms a stable SEI film capable of inhibiting formation and extension of lithium dendrite so that the negative electrode of a lithium metal battery having a high possibility of battery ignition may be stabilized and an internal short-circuit may be prevented, and a lithium metal secondary battery including the same is provided.