Product Details of Atomfair Lithium Battery Electrolytic Copper Foil (BCF)

1. Basic Product Information

1.1 Product Overview

Atomfair Lithium Battery Electrolytic Copper Foil (BCF) is a core material specifically engineered for the lithium-ion battery manufacturing industry. Produced via an electrolytic process, it boasts high purity (≥99.9%), low impurity content, a smooth and flat surface, uniform tension, and excellent coatability.

With superior hydrophilicity, it effectively enhances battery charge-discharge cycles and service life. We offer on-demand slitting and customization services to precisely match material requirements for diverse battery products.

1.2 Product Specifications

Project	Parameter Details
Nominal Thickness	4.5um – 20um (Standard specs: 6um, 7um, 8um, 9/10um, 12um, 15um, 20um)
Tolerances	Width: 0/+2mm; Length: 0/+10m
Winding Method	S-side up, stable tension without loose curling

1.3 Core Performance (Compliant with IPC-4562-2000 Standard)

Performance Indicator	Unit	Specification Requirements
Copper Content	%	≥99.9
Surface Density	mg/10cm²	6um: 54±1; 7um: 63±1.25; 8um: 72±1.5; 9/10um: 89±1.8; 12um: 107±2.2; 15um: 133±2.8; 20um: 178±3.6
Tensile Strength (25℃)	Kg/mm²	28-35
Elongation (25℃)	%	6um: 5-10; 7um: 5-15; 8um & above: 10-20
Glossy Surface (S-Side) Roughness (Ra)	um	0.1-0.4
Rough Surface (M-Side) Roughness (Rz)	um	6um: 0.8-2.0; Other specs: 0.6-2.0
Pinholes	Pcs	None
Discoloration Resistance	–	No discoloration at 130℃/10min & 150℃/10min
Waves/Wrinkles	–	Max 1 spot: Width ≤40mm; Max 1 spot: Width ≤30mm
Appearance	–	No functional defects (creases, scratches, contamination, oxidation, discoloration)

1.4 Product Advantages

Superior Structure: Double-sided symmetric structure, metal density close to copper’s theoretical density, ultra-low surface profile, and excellent tensile strength & elongation.

Enhanced Battery Performance: Maximizes contact area with anode materials, significantly reducing contact resistance between anode current collector and active material while improving anode sheet structural symmetry.

Longer Service Life: Excellent thermal expansion resistance prevents anode sheet breakage during charge-discharge cycles, extending battery lifespan.

Efficient Production: High purity and low impurities ensure stable battery performance; excellent coatability meets high-efficiency manufacturing needs.

2. Product Applications

As a core carrier material for lithium-ion batteries, it is mainly used to manufacture battery anode carriers and current collectors. It is widely compatible with various lithium-ion battery products, including:

Consumer electronics batteries (mobile phones, laptops, etc.)

Power batteries (new energy vehicles, energy storage systems, etc.)

Industrial energy storage batteries

It provides core support for battery cycle life, charge-discharge efficiency, and structural stability.

Note: All performance parameters are tested under standard conditions (25℃, 1 atm). For customized specifications or detailed test reports, please contact our technical team.

If you’re interested, have any questions, or have specific customization requirements, please feel free to contact us at inquiry@atomfair.com.

Lithium Battery Electrolytic Copper Foil

Atomfair Double-Sided Symmetric BCF Copper Foil, Pinhole-Free for Lithium-Ion Batteries