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Graphite Coated Aluminum Foil
Graphite coated aluminum foil is a material used for positive current collection of lithium ion batteries after adding a carbon coating on the surface of aluminum foil.
The carbon material powder such as nano-conductive graphite is mixed with the fixed film-forming agent, solvent and auxiliary agent to form a slurry, which is coated on the surface of aluminum foil, and a dense carbon coating layer is formed after drying.
Description
Graphite Coated Aluminum Foil is designed as a new-type of aluminum foil current collector with uniform coating of graphene on its surface. Based on the excellent electrical and two-dimensional layer structure of ultra-thin layer with a thickness of less than 0.5μm on the surface of aluminum foil has high electrical conductivity,which significantly reduces the interface resistance,and thus improves the adhesion between active materials and aluminum foil.Such a current collector is beneficial to the rate capability and cycle life of battery comprehensive performance those of other aluminum foils based on conventional carbon materials.Graphite Coated Aluminum Foil can replace traditional aluminum foil and corrosion aluminum foil for Li-ion batteries and supercapacitors.
Microstructure And Working Method
1.Microstructure
2.Working Method
Primer layer plays a critical role in enhancing the performance of carbon-coated Al foil (CCF) for lithium-ion battery. The primer acts as an interfacial bridge between the Al current collector and the active material (e.g., graphite, silicon).
Product Parameters
|
Item |
Standard |
Result |
|
|
Foil |
Thickness(um) |
15±0.5 |
15.2 |
|
Width(mm) |
370±1 |
370 |
|
|
Coat |
Single side thickness |
0.8±0.25 |
0.7 |
|
Coat width |
336±0.5 |
336 |
|
|
A side edge |
17±1 |
17 |
|
|
B side edge |
17±1 |
17 |
|
|
A&B align |
≤1.5mm |
0.8 |
|
|
Wind align |
0±2mm |
0.8 |
|
|
Parameter |
Density(g/m2) |
0.45±0.2 double side |
0.402 |
|
Tension |
≥50dyn |
52 |
|
|
Resistance of coating |
2.6Ohm/sqm |
2.52 |
|
|
Strength after coat |
≥170 |
219 |
|
Advantages
▪ Graphite coated aluminum foil uses graphene as the raw material and can achieve ultra-thin coatings.
▪ It can significantly reduce interface resistance and improve the electrochemical performance of lithium batteries, such as rate and cycling.
▪ Improve the adhesion between active materials and current collectors, suppress current collector corrosion, and extend battery cycle life.
▪ Reduce polarization, reduce thermal effects, suppress temperature rise during charging, and improve battery safety
The application of Graphite Coated Aluminum Foil can improve the peeling force of the positive and negative 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 Graphite Coated Aluminum 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
Applications
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 the Electrolytic copper foil?
A1: The material size (Thickness*Width*Length and total Qty). If possible, it would be more better to advise the application of the product
Then we can recommend the most suitable products with details for confirmation.
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.
Hot Tags: graphite coated aluminum foil, China graphite coated aluminum foil manufacturers
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