Electrode binder polymer, electrode binder, electrode binder composition, electrode slurry, electrode, secondary battery, method for producing electrode binder polymer, method for producing electrode binder, method for producing electrode binder composition, method for producing electrode slurry, and method for producing electrode

By using electrode binder polymers with carboxyl and isocyanate functional groups, the problem of performance degradation of secondary batteries under high temperature environments has been solved, and high-temperature storage performance has been improved.

CN122423010APending Publication Date: 2026-07-17RESONAC CORP
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Patent Information

Application Number
CN202480081231.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2024-10-25
Filing Date
2024-12-09
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing secondary batteries cannot maintain their performance in high-temperature environments and lack high-temperature storage capability.

Method used

Electrode binders with carboxyl and isocyanate functional groups and a glass transition temperature above -3℃ are used to prepare electrode binders via copolymerization, thereby improving the protection of the electrode active material surface and the adhesion to the current collector.

Benefits of technology

It effectively inhibits the decomposition reaction of electrolyte and electrolyte in high-temperature environments, improves the film fracture strength of electrode binder, reduces electrode resistance, and enhances the high-temperature storage performance of secondary batteries.

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Abstract

电极粘结剂聚合物具有第1官能团和第2官能团，所述第1官能团为选自羧基和已形成盐的羧基中的至少1种，所述第2官能团为选自异氰酸酯基和封闭异氰酸酯基中的至少1种，所述电极粘结剂聚合物的玻璃化转变温度Tg为‑3℃以上。
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Citation Information

Patent Citations

  • Binder for lithium ion secondary battery electrodes, slurry obtained by using the binder for electrodes, electrodes obtained by using the slurry, and lithium ion secondary battery obtained by using the electrodes

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  • Lithium ion secondary battery

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  • Binder for electrode, electrode, and power storage device

    WO2023053863A1