Battery-Grade PET Copper Foil Current CollectorProduct Type: PET copper foil current collector
Research-grade laboratory product
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LABORATORY PROCUREMENT SUPPORT
For model selection, accessory matching, platform compatibility or configuration confirmation, contact our technical sales team.
E-MAIL: inquiry@atomfair.com
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Manufacturer: Atomfair LLC
Brand: ATOMFAIR®
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This PET copper foil current collector requires precise control of thickness, roughness, and mechanical properties to ensure reliable battery performance. The material must be stored and handled under conditions that preserve its surface energy and oxidation resistance.
- Thickness Tolerance: Maintain thickness within ±10% of nominal value to ensure consistent electrical and mechanical properties.
- Surface Roughness: Keep roughness below Rz 3.0 μm and Ra 0.5 μm to avoid localized current density variations.
- Tensile Strength: Ensure tensile strength meets MD ≥200 MPa and TD ≥180 MPa to withstand winding and assembly stresses.
- Oxidation Resistance: Limit exposure to temperatures above 140°C for more than 20 minutes to prevent oxidation of the copper layer.
- Surface Energy: Maintain dyne value ≥36 dyn/cm to ensure adequate adhesion of subsequent coatings or electrolyte.
How do the tensile strength specifications (MD ≥200 MPa, TD ≥180 MPa) influence the processability of this PET copper foil current collector in roll-to-roll electrode production?
The specified tensile strengths ensure the foil can withstand the mechanical stresses during coating, drying, and winding without tearing or elongation. The higher MD strength (≥200 MPa) is designed for machine direction tension, while TD strength (≥180 MPa) provides cross-direction stability, critical for maintaining dimensional integrity in high-speed processing.
Why is a dyne value of ≥36 dyn/cm important for this PET copper foil when used as a current collector in battery electrodes?
A dyne level of ≥36 dyn/cm indicates sufficient surface energy to promote uniform wetting by electrolyte and electrode slurry formulations. This ensures good adhesion and consistent coating, which directly affects electrochemical performance and cycle life.
How does the oxidation resistance specification of 140°C for 20 minutes affect the electrode drying process for this PET copper foil?
The oxidation resistance at 140°C for 20 minutes is critical for electrode drying after slurry coating, as it prevents copper oxidation that would increase contact resistance and degrade performance. This allows standard drying protocols without requiring inert atmospheres.
This battery-grade PET copper foil current collector features a 1 μm copper + 3 μm polymer + 1 μm copper composite structure with ≤15 milliohm/sq sheet resistance, oxidation resistance at 140°C for 20 minutes, and controlled roughness (Rz ≤3.0 μm, Ra ≤0.5 μm). The ±10% thickness tolerance and ±2 g/m2 area mass tolerance require careful integration into electrode designs.
Positive
- Thin composite current collector structure: The 1 μm copper + 3 μm polymer + 1 μm copper architecture provides low areal mass (25±2 g/m2) and sheet resistance ≤15 milliohm/sq, suitable for lightweight battery electrode designs.
- Moderate oxidation resistance: The foil withstands 140°C for 20 minutes, enabling common drying and processing steps without degradation of the copper layers.
Trade-offs
- Thickness tolerance of ±10%: The ±10% thickness variation (e.g., 5 μm ±0.5 μm) may require batch-level characterization for applications demanding uniform electrode stacking or coating.
- Narrow area mass tolerance: The unit area mass tolerance of ±2 g/m2 (25 g/m2 ±8%) must be accounted for in electrode loading calculations to maintain capacity consistency.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
