High Purity PVDF Binder for Li-ion Battery Cathode Raw Material
AOT
Xiamen, China
10-25 working days
50 Sets/Month
High - purity PVDF binder Kynar, with over 99.5% purity, a thermal decomposition temperature of 410℃, and a viscosity of 1500 MPa·s, is compatible with the NMP solvent system. PVDF binder has low moisture and high binding strength, and is suited to slurry systems of high - nickel ternary and lithium iron phosphate cathodes. It's a ready - to - use material packaged in 1kg aluminum foil bags.
High-purity PVDF binder (Kynar grade) is a polyvinylidene fluoride homopolymer designed for lithium - ion battery cathodes.The PVDF binder has over 99.5% purity, and its 0.1g/g NMP solution at 30℃ has a viscosity of at least 1500 MPa·s. With a high thermal decomposition temperature of above 410℃, it's chemically inert. The standard density is 1.75 - 1.77g/cm³, and the melting point is 156 - 165℃.It can form a strong binding network, making it suitable for the slurry systems of high - nickel ternary, lithium cobalt oxide, lithium iron phosphate and other cathode materials. Its low moisture content (≤0.10%) ensures high compatibility with NMP solvent, resulting in excellent slurry flow properties, a 30% increase in electrode flexibility, and enhanced flame - retardant properties, thus improving battery safety. Packaged in 1kg aluminum foil bags, it meets the R & D needs of power batteries, energy - storage batteries, and solid - state batteries, offering a reliable binding solution for high - voltage cathode materials.
Item
Unit
ASTM Measurement
Appearance
/
White powder
/
Odor
/
without
/
Melting Point
°C
156~165
D3418
Thermal Decomposition
°C
≥ 410
TGA,1%Wt.Loss,N2
Standard Relative Density
g/cm3
1.75~1.77
D792,@23/23°C
Viscosity
Mpa·S
≥1500
30°C,0.1g/gNMP
Moisture
%
≤ 0.10
110°C,-0.09Mpa 1.5h
Exhibition
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Certificate
Cooperative partners
FAQ
Q1: How to prepare a PVDF - NMP solution with 10% solid content?
A: It is recommended to mix PVDF and NMP in a mass ratio of 1:9. Stir the mixture at 800rpm in a 60℃ water bath for 2 hours to get a uniform, transparent and viscous solution.
Q2: What's the significance of the thermal decomposition temperature of 410℃ for electrode baking?
A: PVDF binder property ensures that the material won't degrade during the conventional electrode baking process at 150 - 200℃. This prevents adhesion loss or electrode defects caused by gas release.
Q3: How does the purity of over 99.5% affect battery performance?
A: High purity reduces residual metal ions (such as Na+ and Fe3+), lowering the risk of side reactions in the electrolyte. The PVDF binder improves the battery's cycle capacity retention and high - temperature storage performance.
Q4: How to store unused PVDF binder after opening?
A: Seal PVDF binder and place PVDF binder in a dry environment below 25℃. It's advisable to use nitrogen protection and prevent moisture absorption. The shelf life after opening is 6 months.
Q5: Is it suitable for solid - state battery electrolyte binding?
A: PVDF binder has good compatibility with oxide and sulfide solid - state electrolytes. The molecular weight distribution can be customized to optimize interfacial ion transport efficiency.
