Composite Copper Foil Collector AF-ACCU-1SIDE ATOMFAIR®

$1,199.00

Institutional Procurement & Supply Compliance: As a verified US supplier, Atomfair accepts formal institutional Purchase Orders (POs), contract billing schedules, and custom procurement loops for university and national laboratories, and corporate R&D departments globally.

Research-grade single-sided composite copper foil current collector with ≥4 μm copper foil, 3 μm polymer layer, ≥165 MPa strength and ≥1.2 N/mm peel strength.

Single-Sided Composite Copper Foil Current Collector

Product Type: Composite copper foil current collector

Research-grade laboratory product

Product Overview

Single-sided composite copper foil current collector uses a two-layer structure with lithium battery copper foil and a 3 μm polymer functional layer.

The composite foil specification includes mechanical, electrical, electrochemical, electrolyte-stability and thermal-shutdown performance parameters for battery current collector evaluation.

Performance Features

Structure is ≥4 μm lithium battery copper foil + 3 μm polymer functional layer.
Longitudinal tensile strength is specified at ≥165 MPa and longitudinal elongation at ≥6%.
Interlayer peel strength is specified at ≥1.2 N/mm.
Thermal shutdown characteristic is specified at 120-280 °C through the polymer layer.

Technical Specifications

Parameter	Specification / Available Values
Atomfair Model	AF-ACCU-1SIDE
Structure	≥4 μm lithium battery copper foil + 3 μm polymer functional layer
Longitudinal tensile strength	≥165 MPa
Longitudinal elongation	≥6%
Interlayer peel strength	≥1.2 N/mm
Thermal shrinkage	150 °C for 30 minutes: MD ≤0.9%, TD ≤0.7%
Surface roughness Ra	0.1-0.3 μm
Long-term heat resistance	≥120 °C
Volume resistivity	≤3*10 ohm.m at 25 °C
Surface resistance	≤0.05 ohm/sq
Oxidation potential	≥4.8 V vs Li/Li
Electrolyte stability	60 °C, 1 mol/L LiPF6 electrolyte immersion for 7 days; no delamination or corrosion; resistance change ≤5%
Thermal shutdown characteristic	Polymer layer melts and breaks the circuit at 120-280 °C

Quotation Confirmation: Confirm single-sided copper composite structure and target thickness.

Specification Confirmation: Confirm mechanical, electrical and electrolyte-stability requirements for the selected current collector.

Configuration Support: This row represents the copper/polymer two-layer structure.

Quotation Note: Include target layer thicknesses, width and quantity for quotation support.

LABORATORY PROCUREMENT SUPPORT

For model selection, accessory matching, platform compatibility or configuration confirmation, contact our technical sales team.

E-MAIL: inquiry@atomfair.com

Manufacturer: Atomfair LLC

Brand: ATOMFAIR®

This document outlines the technical constraints for the Atomfair AF-ACCU-1SIDE composite copper foil current collector. The material must maintain structural and electrochemical integrity under specified electrolyte exposure, thermal, and mechanical conditions.

Electrolyte Stability: The composite foil must withstand immersion in 1 mol/L LiPF6 electrolyte at 60°C for 7 days without delamination, corrosion, or resistance change exceeding 5%.
Thermal Shutdown: The polymer functional layer must melt and electrically break the circuit within the temperature range of 120-280°C.
Thermal Shrinkage: After 30 minutes at 150°C, the longitudinal shrinkage must not exceed 0.9% and transverse shrinkage must not exceed 0.7%.
Long-Term Heat Resistance: The current collector must maintain performance after continuous exposure to temperatures of at least 120°C.
Oxidation Potential: The material must exhibit an oxidation potential of at least 4.8 V versus Li/Li+ to prevent anodic degradation.

FAQ

What is the thermal shutdown mechanism of the ATOMFAIR single-sided composite copper foil current collector, and how does it enhance battery safety?

The polymer functional layer melts and breaks the circuit at 120–280 °C, providing a thermal shutdown characteristic. This interrupts current flow during abnormal heating, preventing thermal runaway while maintaining normal operation below the onset temperature.

Is the composite copper foil current collector compatible with standard lithium-ion battery electrolytes, such as LiPF6?

Yes, the foil demonstrates excellent electrolyte stability. It has been tested in 1 mol/L LiPF6 electrolyte at 60 °C for 7 days with no delamination or corrosion and a resistance change of ≤5%, confirming compatibility with common electrolyte systems.

What are the key mechanical and electrical specifications that affect electrode performance when using this composite foil?

The foil has a longitudinal tensile strength of ≥165 MPa, elongation ≥6%, and interlayer peel strength ≥1.2 N/mm. Surface resistance is ≤0.05 Ω/sq and oxidation potential is ≥4.8 V vs Li/Li⁺, ensuring low electrical losses and high-voltage stability during electrode processing and operation.

Assessment

This single-sided composite copper foil current collector combines a lithium battery copper foil with a 3 μm polymer functional layer, providing thermal shutdown safety between 120-280°C and high oxidation potential for high-voltage stability, but requires careful thermal management due to its 120°C long-term heat resistance and thermal shrinkage at 150°C.

Positive

Thermal shutdown safety: Polymer layer melts and breaks the circuit at 120-280°C, providing a safety mechanism against thermal runaway in battery cells.
High electrochemical stability: Oxidation potential ≥4.8 V vs Li/Li+ and electrolyte stability (60°C, 1 mol/L LiPF6 for 7 days with no delamination or corrosion) ensure compatibility with high-voltage cathodes and long cycle life.

Trade-offs

Thermal shutdown activation limit: The polymer layer begins to melt at 120°C, which is also the long-term heat resistance limit, meaning continuous operation above 120°C risks irreversible shutdown of the current collector.
Thermal shrinkage at elevated temperatures: After 30 minutes at 150°C, the foil exhibits MD ≤0.9% and TD ≤0.7% shrinkage, which may cause dimensional instability during battery drying or lamination processes.

Quality Standards & Performance Verification

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.

Shipping & Returns

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).