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 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

Meanwhile, we let you know our more PVDF materials as below:

PVDF Materials:

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)