公开(公告)号：US10727466B2

公开(公告)日：2020-07-28

申请号：US15846819

申请日：2017-12-19

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Won Il Cho ,  Mun Sek Kim ,  In Wook Nah ,  Young Rok Lim ,  Sun Min Park ,  In Hwan Oh

IPC: H01M2/16 ,  C08G73/02 ,  H01M2/14 ,  H01M10/054 ,  H01M12/06 ,  C09D179/02 ,  C09D5/24 ,  H01M10/0525 ,  C09D5/44 ,  C09D7/65

Abstract: In a secondary battery including a separator, the improvement includes a coating layer that is disposed on the separator and that comprises a polyethyleneimine-attached carbonaceous material The secondary battery may include an adhesive buffer layer provided between the separator and the coating layer which imparts adhesion force between the separator and the coating layer. The carbonaceous material adsorbs lithium polysulfides (LiPS) in use to inhibit a shuttling reaction between the anode and the cathode, caused by the dissolution of lithium polysulfides in the electrolyte, and increases recyclability of the lithium polysulfides, resulting in improvement of life characteristics and rate characteristics of the secondary battery.

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.

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.

公开(公告)号：US11666853B2

公开(公告)日：2023-06-06

申请号：US17175705

申请日：2021-02-15

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY ,  KOREA LAND & HOUSING CORPORATION

Inventor： In Wook Nah ,  Jae Ik Kim ,  Soon Jong Kwak ,  In Hwan Oh ,  Daeseung Kyung ,  Youngjong Sim ,  Yeongmin Kim ,  Han-Guen Ahn ,  Sang-Ick Choi

IPC: B01D53/14

CPC classification number: B01D53/1493 ,  B01D53/1475 ,  B01D2252/2041 ,  B01D2252/20415 ,  B01D2252/20421 ,  B01D2252/20484 ,  B01D2257/504 ,  B01D2258/01 ,  B01D2258/05

Abstract: Disclosed are a carbon dioxide absorbent composition in which an N-alkylaminoalkanol; a polyhydroxyamine-based compound; and ethylenediamine and/or diethylenetriamine are mixed, a method for preparing the same, and a method and an apparatus for carbon dioxide absorption/separation using the same. Since the carbon dioxide absorbent according to the present disclosure has superior carbon dioxide absorption capacity and remarkably lower absorbent recycling temperature as compared to the existing absorbents such as monoethanolamine, etc., total energy consumption in the capturing process can be reduced greatly. In addition, since carbon dioxide is recovered at low recycling temperature, contamination by water or absorbent vapor may be prevented.

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：US20180269453A1

公开(公告)日：2018-09-20

申请号：US15846819

申请日：2017-12-19

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Won Il Cho ,  Mun Sek Kim ,  In Wook Nah ,  Young Rok Lim ,  Sun Min Park ,  In Hwan Oh

IPC: H01M2/16 ,  H01M2/14 ,  H01M10/0525 ,  H01M10/054 ,  H01M12/06 ,  C09D179/02 ,  C09D5/24 ,  C08G73/02

CPC classification number: H01M2/1686 ,  C08G73/0206 ,  C09D5/24 ,  C09D5/44 ,  C09D7/65 ,  C09D179/02 ,  H01M2/145 ,  H01M2/1613 ,  H01M2/1646 ,  H01M2/1653 ,  H01M10/0525 ,  H01M10/054 ,  H01M12/06 ,  H01M2220/30 ,  Y02E60/128

Abstract: A polyethyleneimine-attached carbonaceous material for a separator for a secondary battery. The carbonaceous material for coating a separator for a secondary battery adsorbs lithium polysulfides (LiPS) to inhibit a shuttling reaction between an anode and a cathode, caused by the dissolution of lithium polysulfides in electrolyte, and increases recyclability of lithium polysulfides, resulting in improvement of life characteristics and rate characteristics of a battery.