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公开(公告)号：US10727466B2
公开(公告)日：2020-07-28
申请号：US15846819
申请日：2017-12-19
发明人： Won Il Cho , Mun Sek Kim , In Wook Nah , Young Rok Lim , Sun Min Park , In Hwan Oh
IPC分类号： H01M2/16 , C08G73/02 , H01M2/14 , H01M10/054 , H01M12/06 , C09D179/02 , C09D5/24 , H01M10/0525 , C09D5/44 , C09D7/65
摘要： 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.
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公开(公告)号：US10923726B2
公开(公告)日：2021-02-16
申请号：US16296158
申请日：2019-03-07
发明人： Won Il Cho , Mun Sek Kim , Seung Hun Lee , Min Seop Kim , Van Dung Do , In Wook Nah , In Hwan Oh
IPC分类号： H01M4/66 , H01M4/38 , H01M4/131 , H01M10/052 , C01B32/174 , H01M4/02
摘要： 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.
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3.发明授权公开(公告)号：US10923725B2
公开(公告)日：2021-02-16
申请号：US16285680
申请日：2019-02-26
发明人： Won Il Cho , Mun Sek Kim , Ji Hyun Ryu , Seung Hun Lee
IPC分类号： 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
摘要： 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.
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公开(公告)号：US10658670B2
公开(公告)日：2020-05-19
申请号：US15846855
申请日：2017-12-19
发明人： Won Il Cho , In Wook Nah , In Hwan Oh , Van Dung Do , Mun Sek Kim
IPC分类号： 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
摘要： 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.
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公开(公告)号：US10804567B2
公开(公告)日：2020-10-13
申请号：US15975016
申请日：2018-05-09
发明人： Won Il Cho , Mun Sek Kim , Ji Hyun Ryu , In Wook Nah , Min Seop Kim , Sun Min Park
IPC分类号： H01M10/0569 , H01M10/0525 , H01M10/0567 , H01M4/38 , H01M10/0568 , H01M10/052 , H01M4/02 , H01M4/525 , H01M4/505 , H01M4/58
摘要： 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.
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公开(公告)号：US10243197B2
公开(公告)日：2019-03-26
申请号：US15442908
申请日：2017-02-27
发明人： Won Il Cho , Mun Sek Kim , In Wook Nah , Min Seop Kim , Lynden A. Archer , Snehashis Choudhury , Zhengyuan Tu
IPC分类号： H01M4/02 , H01M4/04 , H01M4/36 , H01M4/38 , H01M4/62 , H01M4/134 , H01M4/583 , H01M10/052 , H01M4/1395
摘要： 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.
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7.发明申请公开(公告)号：US20180269453A1
公开(公告)日：2018-09-20
申请号：US15846819
申请日：2017-12-19
发明人： Won Il Cho , Mun Sek Kim , In Wook Nah , Young Rok Lim , Sun Min Park , In Hwan Oh
IPC分类号： H01M2/16 , H01M2/14 , H01M10/0525 , H01M10/054 , H01M12/06 , C09D179/02 , C09D5/24 , C08G73/02
CPC分类号： 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
摘要： 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.
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