Feature
TOB-PVDF-770 is a fluoropolymer binder for electrodes in lithium-ion battery.
It is especially suitable for high-nickel materials and sodium-ion batteries.
It can solve the gel problem when mixing the slurry. In addition, it can also soften the battery electrode.
This binder shows better alkali resistance as compared with standard PVDF binders. Therefore, it has long-term stability with electrode slurry using strong alkaline active materials such as NMC811 and NCA, which enables stable coating in the electrode process.
This binder also applies the great flexibility on electrodes. It achieves high electrode density, and can contribute to high battery capacity.
Properties | Typical Value | Test method |
Physical | ||
Specific Gravity | 1.76 - 1.79 | ASTM D792 |
Molecular Weight | 1.5- 2.0×106 | GPC |
Water Absorption | <0.2% | ASTM D543 |
Mechanical | ||
Tensile Modulus | 600 to 800 MPa | ASTM D638 |
Viscosity | ||
Solution Viscosity | 1140 to 2250 mPa s | B-type viscometer |
Intrinsic Viscosity | 0.25 to 0.32 l/g | Ubbelohde viscometer |
Thermal | ||
Melting Point6 | 163 to 173oC | DSC |
Glass Transition Temperature | -30 to -40oC | DSC |
Heat of Fusion | 45 to 55 J/g | DSC |
Peak Crystallization Temperature | 135 to 145oC | DSC |
Thermal Stability | >370oC | TGA |
Electrical | ||
Surface Resistivity | >1.0E+14 ohms | JIS K6911 |
Volume Resistivity | >1.0E+14 ohmscm | JIS K6911 |
Weight loss on heat | ||
Volatile | 0.1 wt% MAX | Dkin's method |
1. Molecular weight data were obtained by Gel permeation Chromatography in dimethylformamide. (40ºC) 2. 23 ºC, 24hr 3. The test sample is a press sheet at 250ºC. Thickness: 2 mm , Dumbbell Type, Speed: 50mm/min 4. B-type viscometer, Rotor no.THM-13, 12rpm, 25 ºC 5. DMF, 30 ºC, Ubbelohde viscometer 6. Heating rate: 20ºC/min, Main peak 7. Heating rate: 20ºC/min 8. Cooling rate: 20ºC/min, Main peak 9. @ 1% weight loss 10. Film thickness: 35 mm, After 5 min, 500V @23ºC, 30%RH 11. Weight loss after heating for 2 hours at 150ºC |
