PVDF Powder Lithium Battery
Introduction of PVDF Powder Lithium Battery FR905 Polyvinylidene fluoride (PVDF) polymers are widely used as binders in lithium ion batteries. Certain grades of PVDF are synthesized especially for binder use. The polymerization process and the molecular weight make a difference in binder...
Introduction of PVDF Powder Lithium Battery FR905
Polyvinylidene fluoride (PVDF) polymers are widely used as binders in lithium ion batteries. Certain grades of PVDF are synthesized especially for binder use. The polymerization process and the molecular weight make a difference in binder processing and performance.
The peel strength of the cathode was profoundly affected by the MW of the PVDF Emulsion-polymerized grades can provide higher peel strength at the same loading as suspension-polymerized grades The cell capacity can be significantly improved by using PVDF homopolymer of super high molecular weight
The combination of polyvinylidene fluoride (PVDF) and N- methylpyrrolidine (NMP) is used for the binder and the solvent, accordingly. PVDF is soluble in NMP and allows the preparation of slurry having a proper viscosity. Furthermore, PVDF shows a good chemical resistance in a common carbonate-based organic solvents (EC, DEC, DMC) used as electrolytic solution for LIBs. However, PVDF does not meet completely to all of the binder properties required for LIBs, especially for ionic liquid based electrolytes. The active mass can break away from the current collector because PVDF tends to swelling in ionic liquids. Such delaminating process of the active mass leads to declining the performance of LIBs during the process of charging-discharging, quick capacity fading and decreasing the battery serviceability. For this reason it is very important to select a binder, which will reduce the delaminating the active mass. The further improvement of PVDF binder is possible by combination of initial vinylidene fluoride with a copolymer such as hexafluoropropylene (HFP). The presence of copolymer in PVDF binder provides the improved properties for electrode binder, such as adhesion strength and flexibility.
Technical Properties of PVDF Powder Lithium Battery FR905
ASTM D 3418
No foreign matter
Loss on drying
Meanwhile, we let you know our more PVDF materials as below:
1.PVDF Resin-FR904 for film production
2.PVDF Resin-FR905 for Lithium Battery
3.PVDF Resin-FR903 for Compression Molding (Fishing Line)
4.PVDF Resin-FR906 for Injection
5:PVDF Resin-FR907 for Extrusion(Fishing Line)