公开(公告)号：US20230216055A1

公开(公告)日：2023-07-06

申请号：US17927750

申请日：2021-06-15

申请人： GRST International Limited

发明人： Kam Piu Ho ,  Yingkai Jiang ,  Tao Gong

IPC分类号： H01M4/62 ,  H01M4/04 ,  H01M10/0525

CPC分类号： H01M4/622 ,  H01M4/0404 ,  H01M4/624 ,  H01M10/0525

摘要： Provides an aqueous binder composition for a secondary battery electrode, comprising a copolymer and a dispersion medium, wherein the copolymer comprises a structural unit (a), a structural unit (b), and a structural unit (c). The binder composition disclosed herein has improved binding capability. In addition, battery cells comprising electrodes prepared using the binder composition disclosed herein exhibits exceptional electrochemical performance.

公开(公告)号：US20230178740A1

公开(公告)日：2023-06-08

申请号：US17924375

申请日：2021-06-10

申请人： GRST International Limited

发明人： Kam Piu Ho ,  Yingkai Jiang ,  Hongke Qiu ,  Tao Gong ,  Priscilla Huen

IPC分类号： H01M4/62 ,  H01M10/0525

CPC分类号： H01M4/622 ,  H01M4/624 ,  H01M10/0525

摘要： A binder composition that can be used in a dry electrode mixture or electrode slurry for producing an electrode is disclosed. The binder composition comprises a water-compatible copolymer, and has a liquid content of less than 85%by weight, based on the total weight of the binder composition. The reduced liquid content of the binder composition improves transport and storage efficiency compared to a conventional wet binder composition. The binder composition disclosed herein is versatile, and can be used successfully in a dry electrode mixture and an electrode slurry. Batteries comprising electrodes prepared with the binder composition disclosed herein have electrochemical performances comparable to batteries comprising electrodes produced via a conventional wet binder composition.

公开(公告)号：US20230121093A1

公开(公告)日：2023-04-20

申请号：US17910813

申请日：2020-09-25

申请人： GRST International Limited

发明人： Kam Piu HO ,  Yingkai Jiang ,  Tao Gong

IPC分类号： H01M4/62 ,  C08F220/06

摘要： An aqueous binder composition for a secondary battery electrode is provided, comprising a copolymer and a dispersion medium, wherein the copolymer comprises a structural unit (a) derived from a carboxylic acid group-containing monomer, a structural unit (b) derived from an amide group-containing monomer and a structural unit (c) derived from a nitrile group-containing monomer, with an improved binding capability. In addition, battery cells comprising the cathode prepared using the binder composition disclosed herein exhibits exceptional electrochemical performance.