COMPOSITION, BINDER, ELECTRODE MIXTURE, ELECTRODE AND SECONDARY BATTERY
Patent Information
- Application Number
- DE602021033830
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2021-03-01
- Publication Date
- 2025-07-09
- Estimated Expiration
- 2041-03-01
AI Technical Summary
Existing electrode binders face challenges in providing excellent electrolytic solution swelling resistance, adhesion to metal foils, flexibility, and viscosity stability in secondary batteries.
A composition comprising polyvinylidene fluoride (PVdF) with a specific content of vinylidene fluoride and pentenoic acid units, along with a vinylidene fluoride polymer, is used to create an electrode mixture that ensures strong adhesion, flexibility, and resistance to electrolyte swelling while maintaining stable viscosity.
The composition achieves improved electrolytic solution swelling resistance, adhesion to metal foils, and maintains flexibility, preventing viscosity increase, thereby enhancing the performance and longevity of secondary batteries.