Double-Sided Composite Copper Foil Current CollectorProduct Type: Composite 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 composite current collector requires controlled electrolyte exposure and thermal conditions to prevent delamination or corrosion. The polymer functional layer provides thermal shutdown between 120 °C and 280 °C, and the foil must not exceed 150 °C for extended periods to avoid excessive shrinkage.
- Electrolyte Stability Constraint: Immersion in 1 mol/L LiPF6 electrolyte at 60 °C for 7 days must not cause delamination or corrosion, and resistance change must remain ≤5%.
- Thermal Shutdown Constraint: The polymer layer melts and breaks the circuit at temperatures between 120 °C and 280 °C, providing a safety mechanism.
- Thermal Shrinkage Constraint: After 30 minutes at 150 °C, machine direction shrinkage must be ≤0.9% and transverse direction ≤0.7%.
- Interlayer Peel Strength Constraint: The peel strength between layers must be at least 1.2 N/mm to maintain structural integrity.
- Long-Term Heat Resistance Constraint: The current collector can withstand continuous exposure to temperatures up to 120 °C without degradation.
What is the thermal shutdown temperature range of the double-sided composite copper foil current collector and how does it affect battery safety?
The thermal shutdown characteristic is achieved by the polymer layer melting at 120–280 °C, breaking the circuit. This provides a safety mechanism to prevent thermal runaway. The source specifies that the polymer layer melts in this range, and the long-term heat resistance is ≥120 °C, indicating the current collector can operate up to 120 °C without degradation.
Is the double-sided composite copper foil current collector compatible with standard LiPF6-based electrolytes for lithium-ion batteries?
Yes. The source specifies an electrolyte stability test: immersion in 1 mol/L LiPF6 electrolyte at 60 °C for 7 days showed no delamination or corrosion, with resistance change ≤5%. This demonstrates compatibility with standard LiPF6-based electrolytes used in lithium-ion batteries.
What storage conditions are recommended for the double-sided composite copper foil current collector to maintain its performance?
Based on the long-term heat resistance of ≥120 °C and the polymer layer thermal shutdown range of 120–280 °C, the current collector should be stored at temperatures below 120 °C to avoid premature activation of the shutdown mechanism. Room temperature storage is safe; avoid exposure to temperatures above 120 °C.
This double-sided composite copper foil current collector integrates a symmetric Cu/polymer/Cu architecture offering high oxidation potential (≥4.8 V vs Li/Li) and robust electrolyte stability, making it suitable for high-voltage lithium battery applications. The embedded polymer layer provides a thermal shutdown mechanism between 120–280 °C but introduces irreversible shutdown behavior and moderate thermal shrinkage constraints during processing.
Positive
- High voltage oxidation stability: Oxidation potential ≥4.8 V vs Li/Li enables stable operation at high cathode potentials, reducing side reactions.
- Thermal shutdown safety feature: Polymer functional layer melts at 120–280 °C to break the circuit, providing intrinsic thermal runaway protection.
Trade-offs
- Thermal shrinkage at 150°C: MD shrinkage ≤0.9% and TD shrinkage ≤0.7% after 30 min at 150 °C may affect dimensional precision during high-temperature processing.
- Irreversible thermal shutdown: Once the polymer layer melts to break the circuit, the current collector cannot be restored, requiring replacement after a thermal event.
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).
