PVDF Binders for Li-ion Batteries

cathode binders materials

Targray’s ultra-viscous battery-grade PVDF binder formulas deliver best-in-class adhesion for lithium-ion battery manufacturers and R&D Laboratories. Our PVDF formulas are available in commercial-scale quantities both as homopolymer and copolymer powders. For additional details and product specifications, consult the table below.

PVDF Binder | Homopolymer Formulas

Targray PVDF homopolymer is an ultra high viscosity, battery-grade PVDF binder developed specifically for the li-ion battery market.  The powder’s high purity and crystallinity levels deliver exceptional resistance in electrolytes typically used for lithium-ion battery manufacturing.

 

Properties
Type 1 Type 2 Test method
Physical
Density(g/cc) 1.77~1.79 1.77~1.79 ASTM D792
Particle size(μm)(D50) ≤70 ≤70 ISO 22412
Water Absorption(%)(Time 24 hr) ≤0.040 ≤0.040 ISO 62
Dissolution
Rotational viscosity(cps) 8000-12000 1gPVDF:10gNMP,#3spindle,25℃
Rotational viscosity(cps) 8000-16000 0.8gPVDF:10gNMP,#3spindle,25℃
Molecular
Molecular weight(Da) 1,000,000~1,250,000 1,500,000~2,000,000 GPC, DMF, ISO 16014
Intrinsic viscosity(dl/g) 3.0~3.3 3.8~4.5 30℃, DMAC
Molecular weight distribution 1.8-2.5 1.8-2.5 GPC, DMF, ISO 16014
Thermal
Melting Point(℃) 169~173 169~173 ASTM D3418
Crystallization Temperature(DSC peak)(℃) 137~144 137~144 ASTM D3418
Glass Transition Temp, Tg(℃) -40.0 -40.0 ASTM E1356
Decomposition Temperature(℃) 375 375 1% wt. loss / in air
Crystallization Heat(J/g) 50.0~56.0 50.0~56.0 ASTM D3417
Heat of Fusion(J/g) 55.0~66.0 55.0~66.0 ASTM D3417

 

PVDF Binder | Copolymer Formulas

Targray PVDF copolymer is an ultra high viscosity grade polyvinylidene fluoride binder for battery manufacturers. This PVDF binder powder can effectively reduce the amount of formula required in manufacturing, lowering battery DC resistance, improving energy density of the battery charge and enhancing discharge performance. Moreover, it inhibits cell resistance changes during cycling, which meets the rigorous needs of automotive battery manufacturers.

 

Properties Type 1 Type 2 Test method
Physical
Density(g/cc) 1.77~1.79 1.77~1.79 ASTM D792
Particle size(μm)(D50) ≤70 ≤70 ISO 22412
Water Absorption(%)(Time 24 hr) ≤0.040 ≤0.040 ISO 62
Dissolution
Rotational viscosity(cps) 8,000-10,000 1gPVDF:10gNMP,#3spindle,25℃
Rotational viscosity(cps) 8,000-10,000 0.8gPVDF:10gNMP,#3spindle,25℃
Molecular
Molecular weight(Da) 1,000,000~1,300,000 1,300,000~1,500,000 GPC, DMF, ISO 16014
Intrinsic viscosity(dl/g) 3.1~3.5 3.6~4.0 30℃, DMAC
Molecular weight distribution 2.5-3.5 2.5-3.5 GPC, DMF, ISO 16014
Thermal
Melting Point(℃) 162~168 162~168 ASTM D3418
Crystallization Temperature(DSC peak)(℃) 130~140 130~140 ASTM D3418
Glass Transition Temp, Tg(℃) -40.0 -40.0 ASTM E1356
Decomposition Temperature(℃) 350 350 1% wt. loss / in air
Crystallization Heat(J/g) 36.0~45.0 36.0~45.0 ASTM D3417
Heat of Fusion(J/g) 40.0~50.0 40.0~50.0 ASTM D3417

 

Working closely with our supply partners and organizations including the Electrochemical Society and NAATBatt International, we help lithium-ion battery manufacturers and researchers worldwide commercialize ambitious new technologies for the energy storage market. Contact us today to learn more.

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