公开(公告)号：US11031598B2

公开(公告)日：2021-06-08

申请号：US16318971

申请日：2018-05-31

申请人： LG CHEM, LTD.

发明人： Kyung Oh Kim ,  Choonghyeon Lee ,  Jeongae Yoon ,  Sujee Kwon ,  Doo Kyung Yang ,  Sung Soo Yoon

IPC分类号： H01M4/62 ,  C08F220/28 ,  H01M10/052 ,  H01M4/02

摘要： A binder for a positive electrode of a lithium-sulfur secondary battery, including an acrylic polymer including an acrylic monomer polymerized unit, a non-acrylic monomer polymerized unit and a redox monomer polymerized unit, as well as a positive electrode active layer, a positive electrode and a lithium-sulfur secondary battery manufactured using the binder. The acrylic polymer contains at least 30 wt. % of the acrylic monomer polymerized unit.

公开(公告)号：US11518836B2

公开(公告)日：2022-12-06

申请号：US16954016

申请日：2019-05-08

申请人： LG CHEM, LTD.

发明人： Jeongae Yoon ,  Sujee Kwon ,  Bora Jung ,  Sung Soo Yoon ,  Byoungkuk Son ,  Eunkyung Park ,  Minchul Jang

IPC分类号： C08F259/08 ,  C08F214/22 ,  C09D127/16 ,  H01M4/04 ,  H01M4/66 ,  C09D151/00 ,  H01M4/02 ,  H01M4/62 ,  H01M4/36 ,  H01M4/13

摘要： A polymer for an electrode protective layer including a polymer (A) including a fluorine-based polymer in which a monomer unit including poly(alkylene oxide) and a monomer unit including a curable functional group (e.g., a thermocurable functional group or a photocurable functional group) are grafted on the fluorine-based polymer, and when preparing an electrode by coating an electrode active material layer using the polymer and curing (e.g., thermally curing or photocuring) the result, excellent lithium ion conductivity is obtained since lithium ion flow is not inhibited, chemical resistance for an electrolyte liquid is high, and voltage stability of a secondary battery may be enhanced by suppressing side reactions with the electrolyte liquid occurring on an electrode active material surface due to properties of a uniform and flexible protective layer.

公开(公告)号：US11417909B2

公开(公告)日：2022-08-16

申请号：US16646982

申请日：2018-07-20

申请人： LG CHEM, LTD.

发明人： Sujee Kwon ,  Jeongae Yoon ,  Sung Soo Yoon ,  Kyung Oh Kim ,  Jonghyun Chae ,  Yeonju Lee ,  Daeil Kim ,  Lucia Kim ,  Jongheon Kwak

IPC分类号： H01M10/0565 ,  H01M10/0525 ,  H01M10/0562 ,  H01M10/0563

摘要： A solid electrolyte composition for a lithium secondary battery including a fluorine-based polymer having grafted thereon a unit comprising alkylene oxide group and a crosslinkable functional group. The polymer may be formed by a process including grafting a monomer on a fluorine-based polymer, where the monomer includes alkylene oxide group and a crosslinkable functional group. Also disclosed is a solid electrolyte for a secondary battery formed by thermally curing the composition. By graft copolymerizing a monomer including alkylene oxide group and a crosslinkable functional group on a fluorine-based polymer having high lithium ion conductivity, the solid electrolyte is capable of providing a solid electrolyte for a secondary battery having significantly enhanced solid electrolyte ion conductivity and electrochemical stability.