Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology (Hong Kong) Limited

Ningde Amperex Technology Limited

Ningde Amperex Technology Limit Ed

Ze Zhong

Zengbin Wei

Long Wang

Huihui Liu

Xinghui Wang

Chengdong Sun

Yi Zheng

Lingyun Feng

Hao Dong

Zhongsi Zhu

Hang Zhou

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.

Secondary battery, method for preparing the same, copolymer and apparatus

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). The secondary battery provided by the present application has an effectively improved cycle life.

Secondary battery, apparatus containing the secondary battery, method for the preparation of the secondary battery, and binder composition

A bonding agent includes: structural units represented by Formula I, Formula II, Formula III, and Formula IV: 

Bonding agent used in lithium-ion battery

The present disclosure relates to a lithium-ion battery bonding agent and a lithium-ion battery comprising the same. The bonding agent may be a polymer comprising structural units represented by Formula I, Formula II, Formula III, and Formula IV, and has an average molecular weight of 500,000 to 1.2 million. The bonding agent may be incorporated into at least one of a positive film, a negative film, a separator, and an electrolyte in the battery. The bonding agent can significantly improve the flexibility of the positive film, avoid processability and battery performance issues caused by the electrode film being too brittle, and help improve the compact density and battery energy density.

Lithium-ion battery having a bonding agent

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Ningde, China

Ze Zhong