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Positive Electrode Water-based Carbon Coated Aluminum Foil
Water-based carbon coated aluminum foil is a composite material used as the positive electrode current collector in lithium-ion batteries. It consists of an aluminum foil substrate coated with a conductive carbon layer using a water-based (aqueous) coating system. This technology significantly improves battery performance by reducing contact resistance and enhancing adhesion between the active material and the current collector .
Description
Carbon coated aluminum foil, also know as Conductive coated aluminum foil refers to the upper and lower two layers of high-purity rolled aluminum foil with a thickness of less than 50μm, uniformly coated with a layer of conductive materials such as carbon nanotubes, graphene, conductive carbon black, conductive graphite and special adhesives Consists of conductive coating composite products.It's used in the positive current collector of lithium ion batteries and bipolar plates of super capacitors (EDLC). Positive Electrode Water based Carbon Coated Aluminum Foil is one of type of this kind of material, we also supply oil based type.
Water-based carbon coated aluminum foil is manufactured by applying a uniform layer of conductive carbon material (such as conductive carbon black, graphite, graphene, or carbon nanotubes) onto the surface of aluminum foil using a water-based slurry system . The coating is typically applied via roll coating, followed by drying at temperatures between 45-95°C
Specification of Positive Electrode Water Based Carbon Coated Aluminum Foil
Double side coating with 1-micron thickness each side
Density: 0.5 g/m2
Surface resistivity: < 30 ohms per 25um²
Binder: Modified acrylate adhesive (water based)
Advanced Manufacturing Capabilities
State-of-the-art manufacturing processes can achieve:
Minimum coating thickness: As thin as 200 nm (0.2 μm) per side
Minimum coating density: As low as 0.02 g/m²
Coating speed: Up to 150 m/min (industry average: 30-40 m/min)
Alignment accuracy: ±0.3 mm for double-side coating registration
Substrate of Aluminum Foil
|
Item |
Test Data |
Test method |
|
Aluminum foil thickness |
12~30um |
Micrometer |
|
Color |
Black / gray |
Visual |
|
Conductive coating single surface density (g/㎡/ side) |
0.5-2.0 g/㎡ |
weighing method |
|
Coating thickness (Double side) |
A: 4-6um B: 2-3um |
Thickness gauge |
Specification of size
Package:1.0 kg/roll
Coated width: 200mm
Total Width: 260 mm cathode substrate
Total Thickness: 18 um
Length: About 80 meters ( packing based on weight )
Core Size: 76 mm (3 inch)
Product Structure and Working Method
1.Product Structure
The primer layer technology for carbon-coated Al foil appears to address critical challenges in lithium-ion battery (LIB), particularly in improving interfacial contact, reducing stress from active material expansion, and protecting current collectors.
2.Working Method
Primer layer plays a critical role in enhancing the performance of carbon-coated Al foil for lithium-ion battery(LIB).The primer acts as an interfacial bridge between the copper current collector and the anode active material (e.g., graphite, silicon).
Advantages
The application of conductive coating foil can improve the peeling force of the positive electrode sheets of lithium-ion batteries, thereby enhancing the battery cycle life, reducing the battery internal resistance, improving the battery's charging and discharging rate, and enhancing its charging and discharging ability in low-temperature environments. It can also improve the direct pass rate and assembly success rate in the battery production process, thereby significantly reducing the overall cost of battery manufacturing.
The conductive coated Al foil produced by our company can be processed with high-precision coating on the thinnest 6um Al foil, and the coating surface density can be controlled between 0.02g/㎡ and 5g/㎡. That is to say, we can evenly coat a minimum of 0.02g of conductive substance on the surface of 1 square meter of Al foil, with a thickness of only 200nm. The conductive coated aluminum foil is the thinnest that can be processed with advanced coating on 10um hard high-purity aluminum foil, and the coating surface density can be controlled within 0.02g/㎡ and 5g/㎡ In other words, we can uniformly coat at least 20mg of conductive material on the surface of an aluminum foil with a thickness of only 200nm per square meter. We are currently at the forefront of this technology in the world.
The coating speed on aluminum foil can also reach a stable 150m/min, while the industry average speed is only 30-40m/min. At the same time, the alignment accuracy of conductive coated copper foil can still be controlled within ± 0.3mm. In terms of coating pattern design, not only can continuous full width coating be completed, but customized production can also be carried out according to customers' special requirements, which strongly supports the product design and technological progress of downstream battery enterprises. We can theoretically coat aluminum foil with any pattern, and the alignment accuracy of front and back coating can also reach ± 0.3mm, leading the entire industry.
Test Equipments
Certificate
Application
Water-based carbon coated aluminum foil is specifically recommended for:
Water-based positive electrode systems – Particularly effective with LiFePO₄ (LFP) and other aqueous-processed cathode materials
Nano or sub-micron particle electrodes – Improves adhesion of fine active material particles
High-rate batteries – Enhances power performance for applications requiring fast charge/discharge
Large-format batteries – Improves consistency across battery packs
Company Profile
HSMetal focuses on the R&D and production of conductive and thermally conductive interface materials for new energy power battery cells, modules, and battery housings. HSMetal has invested significant human and material resources in the independent research and development of conductive materials. Our core business, the conductive series products for lithium-ion batteries, has gained widespread acceptance in the new energy and 5G fields.
We utilize primer technology to enhance electrode materials and unlock their full potential in practical applications. Our primer is an ultra-thin coating based on carbon, graphite, or carbon nanotubes, compatible with virtually any substrate. By applying this coating to electrodes, we effectively mitigate material degradation, enhancing both battery performance and safety. While pre-coating is an established method, our decade of research has refined its use to significantly boost the effectiveness of diverse battery formulations.
HSMetal's conductive coated foil is recognized as a leading solution in the global lithium-ion battery sector. We have become a strategic partner to numerous internationally renowned manufacturers of new energy vehicles and energy storage systems. The product has gained widespread market acceptance and has enabled the formation of an integrated industrial ecosystem centered around our conductive foil technology.
We are planning a development strategic growth path to create significant value in the clean energy industry.
Equipment
Carbon Coated Aluminum Foil
Carbon Coated Copper Foil
Quality Control
R&D Capability
Product Package
FAQ
Q1: What info. should I let you know if i would like to get a quotation for the Carbon Coated Aluminum Foil?
A1: Please inform us whether the battery type is lithium battery or sodium battery, as well as the coating thickness, aluminum foil thickness, coating width, and aluminum foil width. Additionally, please specify whether the adhesive used in the coating is fluorinated or non-fluorinated, and what system is used for the positive electrode, whether it is aqueous or oil-based
Q2:How long is your delivery time?
A2:Generally it is 5-10 days base on we have stock on hand. or 15-20 days if no inventory, then need check with our production team for lead time according to the quantity.
Q3: Do you provide samples ?
A3:Yes, if standard sizes sample is free but buyer need to pay freight cost.
Q4:What is your terms of payment ?
A4: Normal payment term is 30%TT, 70% before shipment get ready to ship
Q5: How do you guarantee the quality of the products?
A5: Each step of production and finished products will be carried out inspection by QC department before storing to the warehouse. NG products are not allowed in the completed goods warehouse.
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