公开(公告)号：EP4024532A1

公开(公告)日：2022-07-06

申请号：EP19954823.1

申请日：2019-12-03

申请人： Contemporary Amperex Technology Co., Limited

发明人： ZHONG, Ze ,  DONG, Hao

IPC分类号： H01M4/62 ,  C09J133/26

摘要： The present application discloses a secondary battery, a method for preparing the same, a copolymer and an apparatus. The secondary battery includes a binder for binding a first substance and a second substance, the binder including a copolymer, wherein the copolymer comprises at least a first monomer unit represented by formula (I), a second monomer unit represented by formula (II), and a third monomer unit represented by formula (III):

The secondary battery provided by the present application can effectively increase the boding force between the first substance and the second substance by including a specific binder, thereby improving the electrochemical performance of the secondary battery.

公开(公告)号：EP4024533A1

公开(公告)日：2022-07-06

申请号：EP19955318.1

申请日：2019-12-03

申请人： Contemporary Amperex Technology Co., Limited

发明人： ZHONG, Ze

IPC分类号： H01M4/62

摘要： The present application discloses a secondary battery, an apparatus comprising the secondary battery, a process for the preparation of the secondary battery, and a binder composition. The secondary battery comprises a binder for bonding a first substance and a second substance, the binder comprising a polymer obtained by crosslinking a binder composition, wherein the binder composition comprises a cross-linkable polymer matrix and a cross-linking agent, the cross-linkable polymer matrix comprises one or more of monomer units represented by formula (I), and the cross-linking agent comprises a compound represented by formula (II), in which R 1 , R 2 and R 3 are each independently selected from H and straight-chain or branched-chain alkyl groups with 1 to 8 carbon atoms; R 4 is a polar group containing an active hydrogen; R 5 is a reactive group to R 4 ; R 6 is selected from H and substituted or unsubstituted hydrocarbon groups with 1 to 8 carbon atoms; and n is an even number greater than or equal to 4, 2≤m≤n. The secondary battery provided by the present application has an effectively improved cycle life.

公开(公告)号：EP3451423A1

公开(公告)日：2019-03-06

申请号：EP18186814.2

申请日：2018-08-01

申请人： Contemporary Amperex Technology Co., Limited

发明人： ZHU, Zhongsi ,  ZHONG, Ze ,  SUN, Chengdong ,  ZHENG, Yi ,  FENG, Lingyun ,  ZHOU, Hang ,  WANG, Long

IPC分类号： H01M4/1393 ,  H01M4/133 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/04

摘要： The present invention provides a negative electrode slurry, a negative electrode plate and an electrochemical energy storage device. The negative electrode slurry comprises a solvent and a solid component dispersed in the solvent. The solid component comprises a negative electrode active material, a water-soluble binder and a dispersant. The negative electrode active material comprises a carbon-type active material. The dispersant comprises an A dispersant and a B dispersant, the A dispersant is a cellulose-type dispersant, the B dispersant is at least one of poly(acrylic acid)-type dispersant, polyacrylate-type dispersant and polyacrylamide-type dispersant. Under a combined effect of the A dispersant and the B dispersant, they can ensure that the electrochemical energy storage device has excellent dynamic performance, which can prevent lithium (or sodium, magnesium and zinc) from precipitating under condition of rapid and large current charging, meanwhile they can ensure that the electrochemical energy storage device has excellent cycle performance.