Solef® PVDF is a family of high-performance PVDF grades ideally suited for binder application thanks to their outstanding properties, such as:

• Electrochemical stability from 0 to 5 V vs Li+/Li
• Solubility in standard solvents such as NMP
• High temperature stability

When Solef® PVDF is utilized as binder, it guarantees durable adhesion at electrodes and mechanical integrity in the aggressive chemical environment of the battery.

Among different grades, it is possible to choose the Solef® PVDF grade according to its viscosity and performances. High molecular weight leads to improved performances, provided that optimized processing conditions are implemented.

Further developments with special focus on new environmental-friendly processes are on-going. Water based binders and binders with a better fit with different chemistries of active materials are being studied.

Materials

Solef® PVDF

With improved wettability in electrolyte, Solef® PVDF resins offer better performances for coated, bulk porous and composites separator membranes. Different technologies can be utilized for manufacturing PVDF-based separator membranes like phase inversion, stretched films and non-woven.

Key features

• Improved wettability of the separator with electrolytes
• Better stability of interfaces between electrodes and separator
• Electrochemical stability in the range between 0 and 5 V vs Li+/Li
• Solubility in a wide range of solvents for solution processing and electrospinning
• High crystallinity grades for manufacturing stretched or bi-oriented films
• Different swelling levels according to the grade

According to processing conditions and required properties of the membrane, it is possible to select the suitable grade among a portfolio of homopolymers and copolymers with different compositions and molecular weights.

Materials

Solef® PVDF