Lithium Battery Copper Foil, Double-Shiny, Single-Shiny or Double-RoughProduct Type: Lithium battery 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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The copper foil is a thin, high-purity current collector for lithium battery electrodes. Its mechanical and thermal properties impose specific handling and processing limits to avoid damage or oxidation.
- Oxidation Resistance: The foil resists oxidation at 140°C for up to 15 minutes, beyond which surface degradation may occur.
- Tensile Strength: The foil exhibits a measured tensile strength of 35 kg/m2, requiring careful tension control during coating to avoid tearing.
- Elongation: Room-temperature elongation is 4.5%, indicating limited ductility that may cause cracking under excessive strain.
- Surface Roughness: Shiny side roughness Ra is ≤0.4 μm, which influences slurry adhesion and requires compatible coating formulations.
- Thickness Tolerance: Thickness tolerance is 0-2 μm, necessitating precise gauge selection for uniform electrode loading.
What is the trade-off between double-shiny, single-shiny, and double-rough copper foil surface formats for lithium battery slurry coating?
The surface format directly affects adhesion and coating uniformity. Double-shiny foil provides the lowest roughness (shiny side Ra ≤0.4 μm, measured 0.24 μm) for smooth coatings, while double-rough foil enhances mechanical interlocking for stronger adhesion on both sides. Single-shiny foil offers a hybrid option, with one smooth side and one rough side, suitable for asymmetric electrode designs. The product supports one-side or two-side slurry coating as required.
What are the mechanical and thermal handling constraints for this 4.5–12 μm ultra-thin copper foil?
The foil has a measured tensile strength of 35 kg/m2 and room-temperature elongation of 4.5%, indicating moderate ductility but limited stretch tolerance. Oxidation resistance is validated at 140 °C for 15 minutes, so prolonged or higher-temperature drying steps may risk surface oxidation. Thickness tolerance is 0–2 μm, requiring careful tension control during coating and winding to avoid tearing or wrinkling, especially at the 4.5 μm gauge.
How does basis weight vary with thickness, and why must it be confirmed per gauge?
Basis weight is thickness-specific and not linearly extrapolated across all gauges. For example, 4.5 μm foil has a basis weight of 35–40 g/m2, 9 μm foil is 85–90 g/m2, and 12 μm foil is 105–110 g/m2. This variation affects electrode loading calculations and slurry rheology, so the exact basis weight must be confirmed for the selected thickness during quotation to ensure accurate cell design.
Lithium battery copper foil current collector with 99.95% purity, available in thicknesses from 4.5 to 12 μm in double-shiny, single-shiny, or double-rough formats, with oxidation resistance verified at 140°C for 15 minutes.
Positive
- High copper purity ≥99.95%: Measured copper purity exceeds the 99.8% specification, reducing impurity-driven side reactions and ensuring consistent electrical conductivity in the electrode.
- Flexible thickness and surface format selection: Available from 4.5 to 12 μm with double-shiny, single-shiny, or double-rough surfaces, enabling optimization for one- or two-side slurry coating and varied electrode designs.
Trade-offs
- Thickness tolerance up to +2 μm: The specified 0–2 μm tolerance means actual thickness can exceed nominal by up to 2 μm, which represents a large relative variation for the thinnest 4.5 μm foils and may affect electrode uniformity.
- Rough-side roughness unspecified: Only shiny-side roughness is provided (Ra ≤0.4 μm); the rough-side surface profile is not given, leaving adhesion performance on the matte side uncharacterized.
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).
