Adhesion

Adhesion of the electrode on the current collector is crucial for battery manufacturers especially with nickel-rich NMC, LMFP, silicon anode, solid-state batteries. Adhesion issues could take place during the processing of the electrode or during the battery’s cycle-life. Thus, generating durability problems for the entire battery system.

En’ Safe® primed foil improves the adhesion. It creates a stronger cohesion between the electrode and the metal foil during the processing and the cycle-life of the battery.
For instance, the 180° peeling test shows a 60% increased adhesion with En’ Safe® compared to bare foil.

Adhesion: +60% with En’ Safe®

Energy

Energy density is a major challenge for battery manufacturers. Cells with higher energy density will either have greater capacity or to reduce the size of the system.

En’ Safe® increases energy density. Thanks to its high conductivity, En’ Safe® empowers the battery in two ways:

  • Higher initial capacity: for some electro-chemistries such as nickel rich NMC, LFP, LMFP… As shown on the diagram, it could bring from 5 to 10% at t0. (Visual A)
  • Higher active material content: En’ Safe® enables the reduction of carbon black and binder in the cathode (such as LFP, NMC…) while maintaining excellent performances (low impedance, no polarization, no capacity loss) Therefore the passive material can be replaced by active material leading to increased energy density. (Visual B)
Battery energy capacity
Battery performance: lower impedance with En’ Safe®
Reduction of internal resistance with En’ Safe®

Power

Fast charging is a limiting parameter preventing extensive battery adoption especially for electric vehicles application. Battery manufacturers are looking for solutions how to lower the internal resistance and impedance inside the battery cells.

En’ Safe® enables high power for fast charging and discharging. With a lower charge transfer resistance, 80% reduction of internal resistance is achieved on LFP cells thanks to En’ Safe® compared to bare aluminum foil. It enables charging at very high rates such as 10C to 20C and increases the power density.

Cycle-life

For electric vehicles and energy storage applications, battery manufacturers aim for 10 to 20 years battery life. Leading to batteries with 10 000 cycles or more.

En’ Safe® increases battery capacity retention. Thanks to its unique primers, En’ Safe® creates a more cohesive interface between electrode and current collector during charge and discharge cycles.
Accelerated ageing test shows that the capacity retention is improved significantly with En’Safe®. These lead to a 20% longer cycle life.

Battery performance: reduce capacity retention with En’ Safe®

Corrosion

Corrosion is a complex process concern: oxidation, passivation, corrosion…

These chemical attacks can come from slurry composition (high or low pH…) or electrolyte composition (salts…)

The primer of En’ Safe® protects against chemical attacks, paving the way to more reliable batteries. Battery manufacturers can focus on developing innovative electrochemistries without worrying about the interaction with the metal foil.

For instance, our primers enable:

  • Water-based slurries with extreme pH processes (< 2 or > 12)
  • New materials such as corrosive salts in electrolyte (xTFSi, xFSi, xNO3…)
  • Aggressive chemicals (Polychlorates, sulfides…) and Sulfur based electrodes.

During processing

Corrosion
with bare foil

No corrosion
with En' Safe

During battery life

Corrosion
with bare foil

No corrosion
with En' Safe

Cost

Cost efficiency is crucial for battery manufacturers and their customers. For example, in electric vehicles the battery represent one thirds of the price of the vehicles. In order to decrease the battery cost, single component optimization is no longer sufficient. A system level approach is necessary: system optimization and total cost of ownership (TCO)

En’ Safe® reduces $/kWh of the battery. Thanks to its upgraded primer, En’ Safe® heavily impacts the initial energy density and the capacity retentions. Leading to a longer durability. In the end the energy price in kWh can be significantly reduced.

Battery performance: En’ Safe® reduces total cost of ownership