EAL-Foil Etched Aluminum foil

EAL-Foil-20 etched aluminium foil is a high-surface-area current collector designed for energy storage electrodes where strong coating adhesion and low interfacial resistance are critical. Compared with smooth aluminium foil, the etched micro-texture increases effective surface area and improves mechanical “keying” of carbon- or oxide-based coatings, helping reduce delamination during drying, calendaring, and cycling.

How it works

The etched surface provides micro-cavities and channels that enhance:

Slurry wetting and anchoring (better coating uniformity)

Contact area at the coating–foil interface (lower contact resistance)

Coating stability under compression (improved calendaring robustness)

Key specifications (EAL-Foil-20)

• Thickness: 20 ± 1 µm
• Width: 200 mm ± 1 mm (custom widths available)
• Areal density: 49 g/m²
• Surface capacitance: 30–50 µF/cm²
• High-temperature oxidation resistance: no oxidation after 200 °C × 30 min
• Aluminium purity: >99.45%
• Tensile strength: >17 N/cm
• Ductility: ≥1.6%
  
  

Typical applications

• Supercapacitor electrodes (activated carbon and hybrid systems)

• Battery cathode current collectors where improved adhesion is required

• Dry electrode / high-loading coatings that benefit from enhanced mechanical interlock (process-dependent)
  
  

Why source via ScienceGears (AU/NZ)

ScienceGears supports researchers with local advice on foil selection, electrode coating workflows, and integration with related tools such as battery cyclers, calendaring equipment, and potentiostats for electrochemical characterisation.