公开(公告)号：US20240413337A1

公开(公告)日：2024-12-12

申请号：US18736598

申请日：2024-06-07

Applicant: GRST International Limited

Inventor： Kam Piu Ho ,  Hongke Qiu

IPC: H01M4/62 ,  H01M4/02 ,  H01M4/04 ,  H01M4/505 ,  H01M4/525

Abstract: The invention provides a method of preparing a cathode slurry for a secondary battery, comprising a binder material, comprising a copolymer P1 and a copolymer P2. Both copolymers each independently comprise a structural unit derived from a monomer containing an acid group; a structural unit derived from a monomer selected from the group consisting of an amide group-containing monomer, a hydroxyl group-containing monomer, and combinations thereof; and a structural unit derived from a monomer selected from the group consisting of a nitrile group-containing monomer, an ether group-containing monomer, an epoxy group-containing monomer, and combinations thereof. As a result of the chemical compositions of the respective copolymers and the method itself, the cathode slurry is well dispersed, and batteries made therefrom have good cycling stability.

公开(公告)号：US20230178740A1

公开(公告)日：2023-06-08

申请号：US17924375

申请日：2021-06-10

Applicant: GRST International Limited

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

IPC: H01M4/62 ,  H01M10/0525

CPC classification number: H01M4/622 ,  H01M4/624 ,  H01M10/0525

Abstract: 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：US20230141592A1

公开(公告)日：2023-05-11

申请号：US17800550

申请日：2020-09-25

Applicant: GRST International Limited

Inventor： Yingkai Jiang ,  Kam Piu Ho ,  Hongke Qiu

IPC: H01M4/62 ,  C08F220/48

CPC classification number: H01M4/622 ,  C08F220/48 ,  C08F2800/20

Abstract: Provided is an aqueous binder composition for a secondary battery electrode, 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, a structural unit (c) derived from a nitrile group-containing monomer, and at least one anionic reactive emulsifier, with an improved binding capability. In addition, battery cells comprising the cathode prepared using the binder composition disclosed herein exhibits exceptional electrochemical performance.

公开(公告)号：US20230114903A1

公开(公告)日：2023-04-13

申请号：US17802966

申请日：2020-09-25

Applicant: GRST International Limited

Inventor： Kam Piu Ho ,  Yingkai Jiang ,  Hongke Qiu

IPC: H01M4/62

Abstract: 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, a structural unit (c) derived from a nitrile group-containing monomer, a structural unit (d) derived from a hydroxyl group-containing monomer, and at least one anionic reactive emulsifier, with an improved binding capability. In addition, battery cells comprising the cathode prepared using the binder composition disclosed herein exhibit exceptional electrochemical performance.