公开(公告)号：US11811049B2

公开(公告)日：2023-11-07

申请号：US17115016

申请日：2020-12-08

申请人： LG CHEM, LTD.

发明人： Yun Kyoung Kim ,  Taek Gyoung Kim ,  Kwonnam Sohn ,  Doo Kyung Yang ,  Mira Im

IPC分类号： H01M4/133 ,  D01F9/20 ,  D01F9/22 ,  H01M10/052 ,  D01D5/00 ,  H01M50/44 ,  H01M50/403 ,  H01M50/431 ,  H01M50/489 ,  H01M50/491 ,  H01M4/36 ,  H01M4/136 ,  D06M23/06 ,  D06M13/322 ,  D01D5/20 ,  D01F9/145 ,  D04H1/4242 ,  D04H1/728 ,  H01M4/58 ,  H01M4/583 ,  H01M4/80 ,  H01M10/0525

CPC分类号： H01M4/133 ,  D01D5/003 ,  D01D5/0038 ,  D01D5/20 ,  D01F9/145 ,  D01F9/20 ,  D01F9/22 ,  D04H1/4242 ,  D04H1/728 ,  D06M13/322 ,  D06M23/06 ,  H01M4/136 ,  H01M4/366 ,  H01M4/583 ,  H01M4/5815 ,  H01M4/806 ,  H01M10/052 ,  H01M10/0525 ,  H01M50/403 ,  H01M50/431 ,  H01M50/44 ,  H01M50/489 ,  H01M50/491 ,  H01M2220/20 ,  Y02E60/10

摘要： Disclosed is a carbon-based fiber sheet and a lithium-sulfur battery including the same. The carbon-based fiber sheet for the lithium-sulfur battery is doped with a high concentration of nitrogen and thus plays a role of preventing diffusion by adsorbing lithium polysulfide eluted from a positive electrode during charging and discharging, thereby suppressing a shuttle reaction and thus improving capacity and lifecycle properties of the lithium-sulfur battery.

公开(公告)号：US11611066B2

公开(公告)日：2023-03-21

申请号：US16631691

申请日：2018-10-29

申请人： LG CHEM, LTD.

发明人： Soohyun Kim ,  Suenghoon Han ,  Kwonnam Sohn ,  Doo Kyung Yang

IPC分类号： H01M4/36 ,  H01M4/38 ,  H01M4/587 ,  H01M10/052 ,  C01B32/168 ,  C01B32/21 ,  H01M4/02

摘要： A method for preparing a sulfur-carbon composite including: (a) stirring a porous carbon material in a solvent mixture including a carbonate-based compound and a volatile solvent and then drying; and (b) mixing the dried porous carbon material with sulfur and then depositing the sulfur in and on the porous carbon material by a heat melting method. A method for preparing a sulfur-carbon composite including: (a) mixing and stirring a porous carbon material and sulfur in a solvent mixture including a carbonate-based compound and a volatile solvent and then drying; and (b) depositing the sulfur in and on the porous carbon material by a heat melting method. In the sulfur-carbon composite, sulfur present in and on the porous carbon material, a proportion of β-monoclinic sulfur phase to sulfur contained in the sulfur-carbon composite is 90% or more based on a total molar ratio of sulfur.

公开(公告)号：US11495824B2

公开(公告)日：2022-11-08

申请号：US16643819

申请日：2018-10-08

申请人： LG CHEM, LTD.

发明人： Kihyun Kim ,  Dongseok Shin ,  Doo Kyung Yang ,  Sun Mi Jin ,  Intae Park

IPC分类号： H01M10/052 ,  H01M4/58 ,  H01M4/60 ,  H01M10/0567 ,  H01M4/40

摘要： An electrolyte for a lithium metal battery and a lithium metal battery including the same, more specifically an electrolyte for a lithium metal battery including a lithium salt, an organic solvent and an additive, wherein the additive includes a functional group that binds to lithium metal at one end thereof and a fluorinated hydrocarbon group at the other end. The electrolyte for the lithium metal battery includes an additive including particular functional groups to improve the stability of the lithium metal and suppress the side reaction at the surface, thereby enabling the lithium metal battery to have high capacity, high stability, and long life.

公开(公告)号：US11349113B2

公开(公告)日：2022-05-31

申请号：US16617937

申请日：2019-03-25

申请人： LG CHEM, LTD.

发明人： Suenghoon Han ,  Jungmi Moon ,  Kwonnam Sohn ,  Doo Kyung Yang

IPC分类号： H01M4/04 ,  C01B25/08 ,  H01M10/0525 ,  H01M4/58 ,  H01M4/02

摘要： A method for preparing iron phosphide (FeP), a positive electrode of a lithium secondary battery including iron phosphide (FeP), for instance, prepared using the method, and a lithium secondary battery including the same. In the lithium secondary battery including the positive electrode using iron phosphide (FeP), the iron phosphide (FeP) adsorbs lithium polysulfide (LiPS) produced during a charge and discharge process of the lithium secondary battery, which is effective in increasing charge and discharge efficiency and enhancing lifetime properties of the battery.

公开(公告)号：US11302907B2

公开(公告)日：2022-04-12

申请号：US16484319

申请日：2018-10-15

申请人： LG CHEM, LTD.

发明人： Suenghoon Han ,  Jungmi Moon ,  Kwonnam Sohn ,  Doo Kyung Yang

IPC分类号： H01M4/136 ,  H01M4/133 ,  H01M4/58 ,  H01M4/583 ,  H01M4/62 ,  H01M4/88 ,  H01M10/052 ,  H01M10/0563

摘要： A positive electrode of a lithium-sulfur battery including maghemite as an additive and a lithium-sulfur battery including the same. The maghemite obtained by heat treatment of lepidocrocite adsorbs lithium polysulfide (LiPS) generated from a lithium-sulfur battery, thereby improving the charging/discharging efficiency and capacity of the battery, as well as increasing the life of the battery.

公开(公告)号：US11239465B2

公开(公告)日：2022-02-01

申请号：US16304806

申请日：2017-05-26

申请人： LG CHEM, LTD.

发明人： Dongwook Lee ,  Kwonnam Sohn ,  Doo Kyung Yang

IPC分类号： H01M4/58 ,  H01M4/04 ,  H01M4/133 ,  H01M4/136 ,  H01M4/1393 ,  H01M4/1397 ,  H01M10/0525 ,  H01M4/587 ,  H01M4/36 ,  H01M10/052 ,  H01M4/38

摘要： A sulfur-carbon composite including a carbon-based material of which surface is modified by acid treatment is provided, as well as a method for preparing the same, and a lithium-sulfur battery including the same. A sulfur-carbon composite suppresses polysulfide elution when used as a positive electrode active material of a lithium-sulfur battery by including a carbon-based material of which surface is modified to have a hydroxyl group and a carboxyl group capable of adsorbing polysulfide on the surface. Accordingly, capacity property and life time property of the battery may be enhanced. In addition, a surface of the carbon-based material can be modified using a simple process of treating with a mixed solution of nitric acid and sulfuric acid, and a content of functional groups on the surface can be controlled depending on a mixing ratio of the nitric acid and the sulfuric acid.

公开(公告)号：US10418633B2

公开(公告)日：2019-09-17

申请号：US15543387

申请日：2016-06-22

申请人： LG CHEM, LTD.

发明人： Charles Kiseok Song ,  Byoung Hyo Jung ,  Seong Eun Park ,  Doo Kyung Yang ,  Ki Young Kwon

IPC分类号： H01M8/04 ,  H01M4/62 ,  H01M4/13 ,  H01M4/38 ,  H01M10/052 ,  C08K5/00 ,  C08K5/541 ,  C08K5/544 ,  H01M4/88 ,  H01M10/39 ,  H01M4/139 ,  C01B17/00 ,  H01M12/06

摘要： The present invention relates to an electrode for a lithium secondary battery, a method for preparing the same, an electrode assembly for a lithium secondary battery comprising the same, and a lithium secondary battery comprising the same, wherein the electrode comprises an electrode active material, an aqueous binder, a compound represented by Formula 1, and a compound represented by Formula 2. Formula 1 and Formula 2 are the same as set forth in the specification. The electrode for a lithium secondary battery improves the physical properties of the aqueous binder in a manner whereby a cross-linking reaction material is combined with the aqueous binder, so that the electrode can improve initial charge/discharge efficiency and the life span of a lithium secondary battery, preferably a lithium sulfur battery, and improve the area capacity of the electrode.

公开(公告)号：US10388962B2

公开(公告)日：2019-08-20

申请号：US15328657

申请日：2015-09-02

申请人： LG CHEM, LTD.

发明人： Taek Gyoung Kim ,  Minchul Jang ,  Doo Kyung Yang ,  Byoungkuk Son ,  Changhun Park ,  Junghun Choi ,  Myeonghun Song

IPC分类号： H01M4/62 ,  H01M4/131 ,  H01M4/134 ,  H01M4/1391 ,  H01M4/1395 ,  H01M4/04 ,  H01M10/0525

摘要： The present specification relates to a lithium electrode, a lithium secondary battery including the same, a battery module including the lithium secondary battery, and a method for preparing a lithium electrode.

公开(公告)号：US10297830B2

公开(公告)日：2019-05-21

申请号：US15741633

申请日：2017-01-24

申请人： LG CHEM, LTD. ,  KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

发明人： Byoung Kuk Son ,  Jang Wook Choi ,  Ali Coskun ,  Min Chul Jang ,  Doo Kyung Yang

IPC分类号： H01M4/60 ,  H01M10/052 ,  H01M4/137 ,  H01M4/13 ,  H01M4/136 ,  H01M4/139 ,  H01M4/1397 ,  H01M4/1399 ,  H01M4/38 ,  C08G73/02 ,  H01M4/02

摘要： The present invention relates to a polymer-sulfur copolymer, a preparation method thereof, and a lithium-sulfur battery including the same.In the case of the polymer-sulfur copolymer according to the present invention, since the carrier is polymerized, there is no possibility that the carrier is eluted, and since the sulfur is covalently bonded to the polymer and uniformly distributed in a certain size in the copolymer, when used as a positive electrode active material for the lithium-sulfur battery, the problem of elution of the polysulfide can be improved. In addition, the polymer-sulfur copolymer according to the present invention has a high sulfur impregnation amount, thereby making it possible to realize a high capacity battery.

公开(公告)号：US10276894B2

公开(公告)日：2019-04-30

申请号：US15107684

申请日：2015-09-25

申请人： LG Chem, Ltd.

发明人： Chul Haeng Lee ,  Shul Kee Kim ,  Gwang Yeon Kim ,  Doo Kyung Yang

IPC分类号： H01M10/0567 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0568 ,  H01M4/04 ,  H01M4/62 ,  H01M4/66 ,  H01M10/0525 ,  H01M10/0569 ,  H01M4/02

摘要： The present invention provides a lithium secondary battery comprising a non-aqueous liquid electrolyte comprising lithium bis(fluorosulfonyl)imide (LiFSI) and a fluorinated benzene-based compound as additives, a positive electrode comprising a lithium-nickel-manganese-cobalt-based oxide as a positive electrode active material, a negative electrode, and a separator.With the non-aqueous liquid electrolyte for a lithium secondary battery of the present invention, a solid SEI film is formed on a negative electrode when initially charging a lithium secondary battery comprising the non-aqueous liquid electrolyte, and an output property of the lithium secondary battery is improved, and an output property and stability after high temperature storage are capable of being enhanced as well.