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Copper Foil And Graphite Coated Copper Foil Used For Lithium Ion Battery
Copper foil and Carbon coated copper foil are critical materials used in lithium-ion batteries (LIBs), primarily serving as current collectors for the anode (negative electrode).
Description
HSMetal is a professional manufacturer of copper foil and battery materials, with first-class production equipment facilities in China.Electrolytic copper foil (ED) and rolled copper foil (RA) are one of our mainly products.As well as the Extension products Carbon coated copper foil for lithium-ion batteries material etc.
The thin thickness electrolytic copper foil is the high-end copper foil.The width range of product is 100mm to 1300mm. The copper foil can effectively improve the energy density of lithium batteries and accord with the future trends of development of new energy vehicle power battery systems - Lightweight.
The Electrolytic copper foil have symmetric structure in double side.The density close to the copper theoretical density,extremely low surface profile, high elongation and tensile strength etc. Meanwhile, as the negative current collector of lithium batteries,the double-sided Electrolytic copper foil has good resistance to cold and thermal expansion, which can significantly extend the battery lifespan.
In addition, Embedded Resin Foil and microporous copper foil are also new product developed directions by our company in the past two years. Please find attached technical information on microporous copper foil for your reference as well.
Property Parameters
1.Electrolytic copper foil (ED)
|
Category |
Weight Per Unit Area |
Tensile Strength |
Elongation(%) |
Roughness(μm) |
High Temperature Oxidation Resistance |
||||
|
Normal Temperature |
180℃ |
Normal Temperature |
180℃ |
Smooth Surface |
Matte Surface |
||||
|
6μm |
High Tensile Strength Copper Foil |
50-55 |
≥45 |
/ |
≥2.0 |
/ |
≤0.43 |
1.0-3.0 |
No Oxidation Discoloration Under Constant Temperature(145℃/15℃min), in compliance with national industry standards《SJ/T11483-2014》Electrodeposited Copper foil for lithium ion battery |
|
Double Sided Glossy Copper foil |
50-55 |
≥30 |
/ |
≥3.0 |
/ |
≤0.43 |
1.0-3.0 |
||
|
8μm |
High Tensile Strength Copper Foil |
70-75 |
≥45 |
/ |
≥2.5 |
/ |
≤0.43 |
1.0-3.0 |
|
|
Double Sided Glossy Copper foil |
70-75 |
≥30 |
≥20 |
≥5.0 |
≥3.0 |
≤0.43 |
1.0-3.0 |
||
|
9μm |
High Tensile Strength Copper Foil |
85-90 |
≥45 |
/ |
≥3.0 |
/ |
≤0.43 |
1.0-3.0 |
|
|
Double Sided Glossy Copper foil |
85-90 |
≥30 |
≥20 |
≥5.0 |
≥3.0 |
≤0.43 |
1.0-3.0 |
||
|
10μm |
High Tensile Strength Copper Foil |
85-90 |
≥25 |
≥15 |
≥2.5 |
≥2.0 |
/ |
/ |
|
|
Single/Double Sided Roughness Copper Foil |
95-100 |
≥25 |
≥15 |
≥2.5 |
≥2.0 |
/ |
/ |
||
|
Double Sided Roughness Copper foil |
95-100 |
≥25 |
/ |
≥3.0 |
/ |
/ |
/ |
||
|
12μm |
High Tensile Strength Copper Foil |
100-105 |
≥45 |
/ |
≥4.0 |
/ |
≤0.43 |
≤5.1 |
|
|
Double Sided Glossy Copper foil |
100-105 |
≥30 |
≥20 |
≥5.0 |
≥3.0 |
≤0.43 |
1.0-3.0 |
||
|
Single/Double Sided Roughness Copper Foil |
105-110 |
≥25 |
≥15 |
≥2.5 |
≥2.0 |
/ |
/ |
||
|
15μm |
Double Sided Roughness Copper foil |
105-110 |
≥25 |
/ |
≥3.0 |
/ |
/ |
/ |
|
|
High Tensile Strength Copper Foil |
128-133 |
≥45 |
/ |
≥4.0 |
/ |
≤0.43 |
≤5.1 |
||
|
Double Sided Glossy Copper foil |
128-133 |
≥30 |
≥20 |
≥6.0 |
≥3.0 |
≤0.43 |
1.0-3.0 |
||
|
18μm |
High Tensile Strength Copper Foil |
157-163 |
≥45 |
/ |
≥5.0 |
/ |
≤0.43 |
≤5.1 |
|
|
Double Sided Glossy Copper foil |
157-163 |
≥30 |
≥20 |
≥8.0 |
≥2.0 |
≤0.43 |
1.0-3.0 |
||
|
20μm |
Single/Double Sided Roughness Copper Foil |
120-125 |
≥30 |
≥20 |
≥5.0 |
≥3.0 |
/ |
/ |
|
|
High Tensile Strength Copper Foil |
175-181 |
≥45 |
/ |
≥5.0 |
/ |
≤0.43 |
≤5.1 |
||
|
Double Sided Glossy Copper foil |
175-181 |
≥30 |
≥20 |
≥8.0 |
≥3.0 |
≤0.43 |
1.0-3.0 |
||
|
25μm |
Double Sided Glossy Copper foil |
220-225 |
≥30 |
≥20 |
≥8.0 |
≥4.0 |
≤0.43 |
1.0-3.0 |
|
|
30μm |
Double Sided Glossy Copper foil |
265-270 |
≥30 |
≥20 |
≥9.0 |
≥5.0 |
≤0.43 |
1.0-3.0 |
|
|
35μm |
Double Sided Glossy Copper foil |
285-290 |
≥30 |
≥20 |
≥9.0 |
≥5.0 |
≤0.43 |
1.0-3.0 |
|
2.Rolled Copper Foil (RA)
|
Classification |
Unit |
6μm |
9μm |
12μm |
18μm |
35μm |
50μm |
70μm |
||
|
1 |
Cu Purity(Grade:C1100) |
% |
Min.99.97 |
|||||||
|
2 |
Thickness Tolerance |
μm |
±0.1 |
±0.2 |
±0.3 |
±0.4 |
±0.5 |
±0.8 |
±1.0 |
|
|
3 |
Tensile Strength |
Hard(H) |
N/mm² |
420-450 |
420-450 |
440-470 |
450-480 |
440-460 |
420-450 |
380-410 |
|
Soft(O) |
160-180 |
160-180 |
160-180 |
170-190 |
180-210 |
200-220 |
210-240 |
|||
|
4 |
Elongation Rate |
Hard(H) |
% |
1.0-1.1 |
1.0-1.2 |
1.0-1.2 |
1.1-1.4 |
1.1-1.4 |
1.1-1.5 |
1.2-1.8 |
|
Soft(O) |
≥6 |
≥7 |
≥7 |
≥8 |
≥11 |
≥13 |
≥20 |
|||
|
5 |
Surface Roughness |
μm |
Max.0.2 |
|||||||
|
6 |
Surface Quality |
No Wrinkle,No Color Difference,No Scratche,No Pit and Salient Point |
||||||||
|
7 |
Storage Condition |
Temperature≤25℃,Relative Humidity≤60%,180 days |
||||||||
Manufacturing Process And Microstructure diagram
PRODUCTION PROCESS FLOW CHART
REVIEW THE COPPER FOIL VIA THE MICRO WORD
Carbon Coated Foil
Conductive coating foil is a specialized composite material engineered for lithium-ion battery applications, particularly as a negative current collector. This advanced material combines high-purity electrolytic or rolled copper foil under 15μm thick or( high-purity rolled aluminum foil thickness <50µm)with a precisely formulated conductive coating. The coating consists of a carefully balanced mixture of carbon-based conductive materials - including carbon nanotubes, graphene, conductive carbon black, and graphite - uniformly applied to both surfaces using specialized adhesive technology. Unlike its aluminum counterpart used in positive electrodes, this copper-based variant is specifically designed for anode applications. As an integral component within the battery cell, it must meet exceptionally demanding performance requirements. The material demonstrates outstanding durability when exposed to electrolytes over extended periods, maintains superior surface contact characteristics, and delivers exceptional interfacial conductivity. Additionally, it's engineered to withstand the mechanical stresses that occur during repeated charge-discharge cycles, ensuring reliable performance throughout the battery's operational lifespan.
|
Technical Parameters |
|||
|
Carbon Coated Copper Foil |
Carbon Coated Aluminium Foil |
||
|
Surface resistivity |
< 30 ohms per 25um^2 |
Double side coating |
With 1-micron thickness each side |
|
Apperance |
Double side coating with 1 micron thickness each side |
Density |
0.5 g/m2 |
|
Density |
0.54 g/m2 |
Surface Resistivity |
< 30 ohms per 25um2 |
|
Copper purity |
> 99.9% |
Binder |
Modified acrylate adhesive (water based) |
|
Copper Thickness |
9um |
The substrate of Aluminum Foil |
Purity > 99.9%Thickness: 16 micron |
|
Coating Width |
UP to 239 mm |
Package for sales |
1.0 kg/roll(Shipped in the vacuum bag) |
|
Total Width |
280 mm |
Coated width |
200mm |
|
Total Thickness |
11um |
Total Width |
260 mm cathode substrate |
|
Package for sales |
Shipped in the vacuum bag |
Total Thickness |
18 um |
Product Structure and Working Method
1.Product Structure
The primer layer technology for carbon-coated copper foil (CCF) appears to address critical challenges in lithium-ion battery (LIB) anodes, particularly in improving interfacial contact, reducing stress from active material expansion, and protecting current collectors.
2.Working Method
The application of conductive coating 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 conductive coated copper foil produced by our company can be processed with high-precision coating on the thinnest 6um copper 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 copper 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 copper foil and 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.
Application
Copper foil And Graphite Coated Copper foil Well used in Lithium Battery, Superelectric equipment, Sodium electrical equipment, Automobile, Energy storate etc fields.
Our Certificates
Test Equipment
Package and Delivery
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
R&D Capability
Quality Control
Product Packages
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.
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