Description
ATOMFAIR® ROLLED COPPER FOILRESEARCH GRADE MATERIAL
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TAILORED SOLUTIONS FOR RESEARCH
Contact our engineering team for technical support or official institutional quotations.
EMAIL: inquiry@atomfair.com
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Manufacturer: Atomfair LLC
Brand: ATOMFAIR®
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Atomfair Rolled Copper Foil is available in three temper states, with hardness adjustable via thermal annealing. Proper temper selection is required to match the mechanical and electrical property demands of lithium-ion battery current collector fabrication.
- Annealing Requirement: Hardness of the copper foil is adjustable via thermal annealing, which alters its mechanical properties such as tensile strength and elongation.
How does the electrical conductivity of Atomfair rolled copper foil vary with hardness state, and what trade-off exists for lithium-ion battery current collector applications?
Annealed (soft O temper) copper foil exhibits a minimum conductivity of ≥90% IACS, while rolled (hard H temper) achieves ≥80% IACS at 20°C. The trade-off is that soft temper provides higher conductivity and elongation (≥15%) but lower tensile strength (220–275 N/mm²), whereas hard temper offers higher strength (330–450 N/mm²) at the cost of reduced conductivity and flexibility. For battery current collectors, soft or semi-hard tempers are typically preferred to balance electrical performance with winding integrity.
What thickness tolerances does Atomfair rolled copper foil achieve, and why are these critical for lithium-ion battery current collector coating processes?
Atomfair rolled copper foil provides thickness tolerances of ±0.002 mm for 0.01–0.015 mm, ±0.003 mm for 0.018–0.10 mm, and ±0.005 mm for 0.10–0.15 mm. These tight tolerances ensure uniform anode coating weight and consistent electrochemical performance across the electrode, minimizing local current density variations that can lead to lithium plating and capacity fade.
What mechanical properties of the soft temper Atomfair rolled copper foil facilitate high-speed electrode winding and battery assembly?
The soft (O) temper offers a tensile strength of 220–275 N/mm², elongation ≥15%, and hardness 40–60 HV. The high elongation provides excellent flexibility and ductility, enabling tight winding without cracking, while the moderate hardness prevents excessive deformation during handling. These properties are essential for reliable, high-throughput electrode manufacturing.
Atomfair JIS H3100 Rolled Copper Foil provides exceptional electrical and thermal conductivity with customizable dimensions and hardness, ideal for lithium-ion battery current collectors. However, users should note the unspecified width tolerances for wider strips and limited formability in the full hard temper.
Positive
- High purity and superior conductivity: Made from C11000 copper with >99.90% purity, this foil delivers annealed conductivity ≥90% IACS and thermal conductivity 390 W/(m·K), ensuring efficient current transport and heat dissipation in battery assemblies.
- Customizable geometry and temper states: Thickness from 0.01 to 0.15 mm, width from 4 to 600 mm, and hardness options (Soft, Semi-hard, Hard) adjustable via annealing allow precise tailoring to fit diverse electrode designs and processing requirements.
Trade-offs
- Width tolerance undefined for wider strips: For widths 250-600 mm, the tolerance is only indicated as compliant with international standards without explicit numerical values, requiring buyers to reference ASTM, JIS, or DIN documents for exact limits.
- Full hard state lacks elongation data: The Hard (H) temper lists tensile strength 330-450 N/mm² and hardness 80-150 HV but no elongation minimum, implying very limited ductility that may restrict bending or deep-forming operations.
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). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
