Custom PET Double-Sided Composite Aluminum Foil Lithium-Ion Battery Current Collector for R&D

Custom PET Double-Sided Composite Aluminum Foil

Einführung

1. This PET double-sided composite aluminum foil uses an ultra-thin 8 μm battery-grade aluminum foil laminated with PET (polyethylene terephthalate) film on both sides. The aluminum layer serves as a lightweight, conductive current collector for lithium-ion cathodes, while the PET layers provide mechanical reinforcement, insulation, and improved puncture resistance. It is particularly suitable for laboratory cells, prototype pouch cells, and research on safer or structurally reinforced electrode designs.

2. We offer fully customizable PET/Al/PET laminates for scientific research and small-scale pilot experiments, including PET thickness, total laminate thickness, roll width, and cut-sheet formats. The composite foil is compatible with standard cathode slurry coating, drying, calendaring, and cell assembly processes used in Li-ion battery R&D. Technical data (aluminum purity, PET properties, thickness tolerances) and OEM/ODM support are available to help you quickly integrate this 8 μm PET composite aluminum foil into new material studies and experimental cell structures.

   Spezifikationen

   Typ	PET Double‑Sided Composite Aluminum Foil / PET–Al–PET Laminate / Lithium‑Ion Battery Current Collector (R&D Use)
   Structure	Multilayer laminate, typically PET/Al/PET: ultra‑thin battery‑grade aluminum foil as central conductive layer, laminated on both sides with PET film for reinforcement and insulation
   Material Grade	Aluminum: high‑purity battery aluminum (≈ ≥99.9% Al, 1xxx‑series type used for Li‑ion cathode collectors); PET: electrical‑grade biaxially oriented PET (BOPET)
   Al/PET Thickness Ratio	Customizable combination of Al and PET thickness; e.g. 8 μm Al core with PET films of ~6–25 μm per side, optimized for strength, flexibility, and safety
   Electrical & Thermal Conduct.	Aluminum core provides low in‑plane resistance and good thermal conductivity for cathode current collection; PET layers add insulation and puncture resistance with minimal impact on current flow
   Formular	Rolls (coils) for coating lines or cut sheets for lab cells (coin, pouch, small prismatic); suitable for R&D and small pilot‑scale use
   Total Thickness Range	Determined by 8 μm Al plus PET on both sides; typical total thickness approx. 20–80 μm depending on PET thickness and design
   Width & Length	Roll width from tens of millimeters up to several hundred millimeters (lab/pilot scale); roll length configurable according to thickness and order quantity
   Bonding Method	PET films laminated to aluminum via adhesive or adhesive‑less thermal lamination to ensure strong adhesion and dimensional stability during drying and calendaring
   Interface Quality	Good PET–Al adhesion to avoid delamination under electrode coating, drying, calendaring, slitting, and assembly conditions
   Mechanical Properties	Higher tensile strength, tear and puncture resistance, and handling robustness compared with bare ultra‑thin Al foil; suitable for manual and automated lab handling
   Surface Finish (Al side)	Aluminum surface available bare or pre‑treated (cleaned/roughened) to improve slurry wetting and adhesion for cathode coatings
   Thermal & Chemical Stability	Compatible with common cathode slurry systems and drying temperatures used in Li‑ion R&D, within PET thermal limits
   Dimensional Tolerances	Tight control of Al and PET thickness, width, and flatness to ensure uniform coating, stable web transport, and consistent electrode quality
   Application Range	Lithium‑ion and other lithium‑based experimental cells: prototype pouch/coin/prismatic cells, reinforced/safety‑enhanced cathodes, and novel cell architecture research
   Processing Capability	Suitable for standard cathode slurry coating, drying, calendaring, slitting, die‑cutting, stacking/winding, and pouch sealing processes in laboratory and small pilot production
   Customization	Tailored PET thickness (one or both sides), Al thickness (e.g. 8 μm or other), roll width/length, Al surface treatment, and sheet formats according to customer drawings and equipment requirements
   Packaging	Supplied in clean, dust‑protected rolls or sheets with moisture‑barrier packing; core and edge protection; outer carton or wooden case for safe storage and international transport

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