Solutions for
lithium-ion battery
Daikin has developed to market innovative solutions
to improve life cycle, safety, and high efficiency of lithium-ion battery.
The fluoromaterials are used in lithium-ion batteries, and high-performance materials are increasingly
required to meet the needs for high capacity, safety, and long life.
Daikin has developed various fluoromaterials for lithium-ion batteries.
We are also focusing on the development of next-generation batteries, contributing to next-generation
lithium-ion batteries and all-solid-state batteries.
Gasket material
NEOFLON PFA is the best suited gasket material for long term use in lithium-ion batteries due to the excellent sealing performance, electrolyte resistance, and moisture barrier.
Cathode binder
NEOFLON VT-475 contributes to high energy density electrode for a new lithium-ion battery design.
Cathode binder with SWCNT
NEOFLON VTD-475N can increase the electric conductivity with small dosage of CNT, and then, increase the energy density.
Cathode binder for dry process
POLYFLON BDP binder is suitable for dry process which is cost effective and eco-friendly.
Electrolyte additives & solvents
Daikin electrolyte additives & solvents are suitable for long life / Si anode / high voltage / safety application.
Gasket material
Fluoropolymers for gasket materials
NEOFLON PFA is the best suited gasket material for long term use in
lithium-ion batteries due to the excellent sealing performance,
electrolyte resistance, and moisture barrier.
Cathode binder
NEOFLON VT-475
NEOFLON VT-475 is an additive of PVdF binder for lithium-ion battery
and it contributes to high energy density electrode for a new lithium-ion
battery design.
VT-475 improves fluidity decrease of the slurry at coating process. Especially high nickel-based active materials such as NMC811 and NCA, VT-475 added PVdF shows significant improvement at coating process.
NEOFLON VT-475 binder produces high density (higher than 3.6 g/cc) and thick electrodes (higher than 30 mg/cm2) with no cracking up winding. It enables high energy density electrodes.
Slurry stability
Homo or
Modified PVdF
Poor flow
NEOFLON VT-475 with
homo PVdF
Optimal flow
Flexibility (Mandrel test, Φ2mm results, after 180° wounded)
Homo or
Modified PVdF
Cracked completely
NEOFLON VT-475 with
homo PVdF
Wounded w/o cracking
Cathode binder with SWCNT
NEOFLON VTD-475N (under development)
NEOFLON VTD-475N is a NMP dispersion which includes NEOFLON
VT-475 and TUBALL.
It can increase the electric conductivity with small dosage of CNT,
and then, increase the energy density.
NEOFLON VT-475
- ・Increase the energy density
- ・Flexibility
- ・Slurry stability
SWCNT (TUBALL)
- ・Higher adhesion
- ・Higher electric conductivity
- ・Increase the energy density (higher active material amount)
Cathode formulation example
Conventional
Active material / CB / Binder = 97 / 1.5 / 1.5 (wt%)
NewActive material / TUBALL / CB / Binder = 98.52 / 0.08 / 0.4 / 1.0 (wt%)
Cathode SEM image of NEOFLON VTD-475N
(VT-475 with TUBALL)
Cathode binder for dry process
POLYFLON BDP (under development)
Current wet process for making the cathode needs to make the slurry
and heat-up. If the dry process is applied, it’s cost effective and
eco-friendly because of NMP free.
POLYFLON BDP binder is suitable for this dry process of conventional
lithium-ion battery as well as all-solid-state battery.
Wet process
Dry process
Electrolyte additives & solvents
SLFE1508 (under development)
Daikin fluoro ether SLFE1508 has excellent oxidation resistance
and no flash point.
The electrolyte with SLFE1508 can improve the battery
performance for Si anode.
Excellent oxidation resistance and safety performance
SLFE1508 gives higher oxidation resistance to electrolyte.
SLFE1508 also has no flash point, therefore it can increase the electrolyte flash point.
Excellent cycle life
SLFE1508 significantly improves the capacity reduction caused by the Si anode expansion and contraction, which is the same improvement effect as FEC.
Suppression of resistance increase
By suppressing the decomposition of the electrolyte,
SLFE1508 can suppress the resistance increase.
Suppression of gas generation
SLFE1508 has outstanding stable chemical stability compared to FEC which is a commonly used as anode additive.
SLFE1508 can reduce the gas generation while FEC generates decarboxylation gas.
Gas generation
