Lithium Battery Aluminum Foil Roll 1060 1235 Alloy 0.012mm 0.02mm High Conductivity Cathode Current Collector

Our Lithium Battery Aluminum Foil Roll is manufactured from 1060, 1070 and 1235 alloys in high-strength H18 temper, specially engineered as the cathode current collector for lithium-ion batteries. The foil combines high electrical conductivity with low internal resistance, ensuring efficient electron collection and stable charge-discharge cycles for power batteries, energy storage cells and consumer electronics.

Micron-Level Precision: Mainstream thickness of battery foil is 8-20 μm and keeps moving toward below 8 μm. Our foil thickness tolerance is controlled within ±0.1 μm by precision rolling with automatic gauge control, delivering uniform gauge that raises cell energy density and batch-to-batch consistency while keeping coating machines running without tearing or wrinkling.

High Strength: Tensile strength reaches 190-280 MPa and can exceed 300 MPa on request. The high-strength temper prevents stretching, wrinkling and edge cracking during high-speed coating, slitting and cell winding, allowing battery makers to use thinner current collectors without sacrificing mechanical reliability.

Surface and Adhesion: Surface energy is 32 mN/m minimum (dyne level 32+), giving high wettability so cathode slurry bonds firmly and uniformly onto the foil without peeling or powder shedding during coating and rolling.

Extreme Cleanliness: The surface is ultra clean with zero tolerance for pitting, scratches or oil stains; no pitting larger than 1 mm in diameter is allowed. Combined with strict pinhole and residual oil control, the foil provides a stable base for high-quality electrode coating.

As a professional aluminum foil manufacturer in Henan, China, we operate our own casting, rolling, slitting and packing lines. Every batch is inspected for alloy composition, conductivity, tensile strength, surface energy, pinholes, oil residue and winding quality before shipment, and mill test certificates are available for customer qualification.

• Product Name: Lithium Battery Aluminum Foil Roll (Cathode Current Collector)
• Alloy: 1060, 1070, 1235 (1100 also available)
• Temper: H18 high-strength temper (O soft available on request)
• Thickness: 8-20 μm mainstream (0.008-0.020 mm), below 8 μm on request
• Thickness Tolerance: within ±0.1 μm, micron-level precision
• High Strength: tensile 190-280 MPa, 300+ MPa achievable
• High Conductivity: 59% IACS min., low internal resistance
• Surface Energy: 32 mN/m min. for firm coating adhesion
• Extreme Cleanliness: no pitting above 1 mm, no scratches or oil stains
• Pinhole Control: 3 pcs/m2 max., pinhole-free option for critical orders
• Uniform Thickness: stable gauge control for smooth machine unwinding
• Burr-Free Edges: precision slitting without edge burrs or dust
• Tight Winding: no telescoping, easy payoff on automatic lines
• High Purity: aluminum content 99.6% min. for 1060 alloy
• Standard: GB/T 3198, ASTM B479 | Certification: ISO 9001:2015, SGS, RoHS
• Custom Service: alloy, temper, thickness, width and core size customized

• Cathode current collector for lithium-ion batteries
• High-strength battery foil for high-speed winding lines
• Power batteries for electric vehicles and buses
• Energy storage battery cells and modules
• Soft pack battery foil for aluminum-plastic composite film
• 3C consumer batteries for phones, laptops and power tools

We support full customization of alloy, temper, thickness, width, roll length, core size and packaging. Battery foil can be supplied in 8-20 μm mainstream gauges or below 8 μm for advanced cell designs, and slit into narrow strips from 30 mm for cell winding or full-width jumbo rolls for coating lines.

Custom strength levels, surface energy targets, oil control levels and private label packaging are available for repeated orders. Free samples are provided for coating adhesion, dyne and conductivity evaluation before bulk purchase.

Our technical team offers professional guidance on alloy, temper and surface treatment selection for different battery chemistries and coating processes. Mill test certificates, material certificates and third-party inspection reports are supplied to support factory audit and customer qualification.

Strict full-batch quality control guarantees stable conductivity, high strength, clean surface and reliable winding performance. Our after-sales team responds quickly and offers long-term technical consultation.

Each lithium battery foil roll is protected with moisture-proof paper and PE film, then packed into export cartons or seaworthy wooden pallets with edge protectors.

Reinforced packing prevents scratches, oxidation and edge damage during long ocean transportation. Clear shipping marks and complete cargo documents are provided for smooth customs clearance.

We cooperate with trusted logistics providers and support sea shipment to global destinations with a lead time of 7-20 working days.

Q1: What is lithium battery aluminum foil used for?
It is mainly used as the cathode current collector of lithium-ion batteries. The foil carries electrons between the cathode coating and the battery tab, so high conductivity, high strength, clean surface and uniform thickness directly affect battery internal resistance, energy density and cycle life.

Q2: Why choose 1060 and 1235 alloys in H18 high-strength temper?
Both alloys have aluminum content of 99.6% or higher, giving excellent electrical conductivity and low internal resistance. The H18 temper raises tensile strength to 190-280 MPa and beyond, preventing wrinkles and tearing during high-speed coating and cell winding.

Q3: What thickness and tolerance can you supply?
Mainstream thickness is 8-20 μm, and we also supply foil below 8 μm for advanced cell designs. Thickness tolerance is controlled within ±0.1 μm through precision rolling, which helps improve energy density and consistency of finished cells.

Q4: How do you ensure high conductivity and low resistance?
We control alloy purity and rolling process strictly, and test electrical conductivity on every batch. The 1060 alloy foil reaches 59% IACS minimum, which keeps the current collector resistance low and improves battery rate performance.

Q5: How do you guarantee surface energy and cleanliness?
Surface energy is tested at 32 mN/m minimum with dyne pens, and the surface is kept ultra clean with zero tolerance for pitting above 1 mm, scratches or oil stains. These controls ensure cathode slurry coats firmly and uniformly without peeling.

Q6: Can you supply narrow width foil for cell winding?
Yes. We provide custom slitting from 30mm to 1600mm with burr-free edges and tight winding, so narrow strips run smoothly on automatic winding machines without tearing or edge dust.

Q7: Are you a factory or a trading company?
We are a professional aluminum foil manufacturer in Henan, China, with our own production lines for casting, rolling, slitting and packing. Factory direct supply ensures stable quality, competitive pricing and reliable delivery.

Q8: Can I get a free sample before bulk order?
Yes, free samples are always available. We can send full-width or slit samples for coating adhesion, dyne and conductivity tests, and samples are usually dispatched within 3 working days.

Q9: What is your minimum order quantity and delivery time?
The minimum order quantity is 1000 kilograms. Stock thicknesses can be shipped within 7 days, and customized production usually takes 15-20 working days after deposit confirmation.

Q10: Do you also supply soft pack battery foil?
Yes. We supply 8021 and 8079 alloy soft pack battery foil in 0.04-0.06mm for aluminum-plastic composite film used in soft pack battery packaging. Please contact us with your specifications for a tailored quotation.