Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of high dyne aluminum foil for lithium battery in China, also supports customized service. With abundant experience, we warmly welcome you to wholesale cheap products in stock here and get free sample from our factory. For price consultation, contact us.
High Dyne Aluminum Foil for Lithium Battery is a specially surface-treated battery-grade aluminum foil designed to deliver enhanced coating adhesion, superior wettability, and stable surface energy for lithium-ion battery cathode applications.
As a professional battery aluminum foil manufacturer and exporter, we supply high dyne value aluminum foil (≥40 dynes/cm) suitable for EV power batteries, energy storage systems (ESS), and high-performance lithium battery production lines. Our foil ensures uniform slurry spreading, strong coating bonding, and consistent electrochemical performance.
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High Quality
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Advanced Equipment
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Professional Team
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Custom Service
What Is High Dyne Aluminum Foil?
Dyne value measures the surface tension / surface energy of aluminum foil and directly determines how well battery slurry or coating materials adhere to the foil surface.
High Dyne Aluminum Foil refers to aluminum foil that:
Has undergone advanced surface treatment
Achieves dyne values ≥38–42 dynes/cm
Maintains stable dyne performance over time
Significantly reduces coating defects such as peeling, shrinkage, and delamination
What is Dyne Value in Battery Aluminum Foil
Dyne value = surface wetting tension
Determines coating adhesion strength
Low dyne → coating failure / delamination
High dyne → stable carbon coating
👉 Industry standard:
Normal foil: ≥30 dyn/cm
Battery grade: ≥32 dyn/cm
High-end coated foil: ≥34 dyn/cm
Performance Advantages
Excellent coating adhesion
Stable electrochemical performance
High conductivity & low resistance
Ultra-clean surface quality
Compatible with high-energy density batteries
Surface Dyne Testing & Quality Control System
Dyne pen test method
Surface tension uniformity inspection
Inline production testing
Batch sampling standards
Stability over time (aging effect)
Through controlled surface treatment technology, the foil achieves a high and stable dyne value (≥40 dynes/cm), enabling uniform slurry spreading, strong binder adhesion, and long-term process stability on high-speed electrode coating lines.
As an experienced battery aluminum foil manufacturer and global exporter, we supply high dyne aluminum foil solutions for EV power batteries, energy storage batteries, and advanced lithium battery systems, supporting both pilot lines and mass production.
Chemical Composition (Typical)
| Alloy | Al (%) | Si (%) | Fe (%) |
|---|---|---|---|
| 1235 | ≥99.35 | ≤0.10 | ≤0.65 |
| 8011 | ≥98.5 | 0.5–0.9 | 0.6–1.0 |
| 8079 | ≥98.3 | ≤0.30 | ≤0.70 |
Physical & Technical Specifications
| Item | Metric | Imperial |
|---|---|---|
| Thickness | 10–20 μm | 0.00039″–0.00079″ |
| Width | 200–1650 mm | 7.9″–65″ |
| Inner Core | 76 / 152 mm | 3″ / 6″ |
| Dyne Value | ≥38 / 40 / 42 dynes/cm | ≥38 / 40 / 42 dynes/cm |
| Temper | O / H18 | O / H18 |
| Surface | Double-side treated | Double-side treated |
| Form | Jumbo Roll / Slit Roll | Jumbo Roll / Slit Roll |
Key Features & Advantages
High & Stable Dyne Value
Ensures excellent wettability and long-term coating adhesion stability.
Superior Coating Adhesion
Prevents powder shedding, edge peeling, and coating delamination.
Low Pinhole & Clean Surface
Optimized for high-speed lithium battery coating lines.
Battery-Grade Cleanliness
Oil-free surface, low residue, suitable for high-energy-density batteries.
Custom Surface Treatment Available
Dyne level tailored to customer coating formulations.
Application Fields
🔋 EV Batteries
Tesla, BYD, CATL cell systems
⚡ Energy Storage Systems
Grid storage batteries (ESS)
📱 Consumer Electronics
High-performance lithium pouch cells
🚗 Power Battery Packs
Cylindrical / prismatic / pouch cells
Carbon Coated Compatibility
Improves conductivity
Enhances cycle life
Requires higher dyne value (≥34 dyn)
Used in high-energy EV batteries
Inspection & Quality Assurance
Our High Dyne Aluminum Foil is produced under a strict quality management system:
Incoming raw material inspection
Online thickness & surface monitoring
Dyne value testing (initial & aging test)
Pinhole inspection & cleanliness control
Mechanical property testing
Third-party testing and inspection services are available through SGS upon request.
Our factory operates in compliance with ISO systems, ensuring consistent export quality.
Battery Manufacturing Failure Risks Caused by Low Dyne Value
Coating delamination during cycling
Uneven slurry adhesion
Increased internal resistance
Reduced cycle life
Localized overheating risk
How High Dyne Value Impacts Lithium Battery Performance
Surface tension → coating bonding strength
Bonding strength → internal resistance
Internal resistance → heat generation
Heat generation → cycle life
Why Choose Our High Dyne Battery Aluminum Foil?
Professional battery aluminum foil manufacturer
Stable dyne control technology
Export experience for EV & ESS battery customers
Flexible MOQ & customized specifications
Reliable quality with traceable inspection records
Looking for a reliable High Dyne Aluminum Foil supplier for lithium battery applications?
📩 Contact us today for:
Technical consultation
Free samples
Detailed specifications & quotation
We are ready to support your battery manufacturing, pilot testing, and mass production sourcing needs.
Our address
Room 4107, Runfeng Building, Sanqiao New Street, Weiyang District, Xi'an City, Shaanxi Province
Phone Number
+86 15769214734
FAQ
Q1: What does "High Dyne" mean for aluminum foil in lithium battery applications?
A:
"High Dyne" refers to high surface energy (surface tension) of the aluminum foil, typically ≥38–42 dynes/cm, which ensures excellent wettability and coating adhesion during lithium battery cathode slurry coating. Insufficient dyne value often leads to poor wetting, coating defects, or delamination.
Q2: What dyne value is commonly required for lithium-ion battery cathode foil?
A:
Most lithium battery manufacturers specify a minimum dyne value of 40 dynes/cm for stable mass production. Some high-speed or advanced coating lines may require ≥42 dynes/cm, depending on slurry formulation and coating speed.
Q3: Is high dyne aluminum foil treated on one side or both sides?
A:
Standard supply is double-side high dyne treated, ensuring consistent wettability regardless of foil orientation during coating.
Single-side treatment can be provided upon request for specific process requirements.
Q4: Does high dyne surface treatment affect electrical conductivity?
A:
No. The surface treatment layer is ultra-thin and non-insulating, designed only to modify surface energy. It does not affect the bulk electrical conductivity of the aluminum foil or battery electrochemical performance.
Q5: Will the dyne value decay over time?
A:
Yes. Dyne value naturally changes due to surface energy relaxation. Our high dyne aluminum foil is engineered with controlled dyne retention, suitable for normal battery production cycles. Proper storage conditions help maintain optimal performance.
Q6: How is dyne value tested and verified?
A:
Dyne value is tested using standard dyne solution or dyne pen methods under controlled conditions. Testing includes:
Initial dyne value inspection
Uniformity across width
Aging evaluation
Third-party verification can be arranged through SGS upon request.
Q7: Which aluminum alloys are suitable for high dyne battery foil?
A:
Common alloys include:
1235 – high purity, excellent conductivity
8011 – balanced strength and formability
8079 – customized or specific battery applications
All supplied alloys meet battery-grade aluminum foil requirements.
Q8: What thickness range is typically used for high dyne lithium battery aluminum foil?
A:
The most common thickness range is 10–20 μm, depending on battery design, energy density requirements, and mechanical strength considerations.
Q9: Is high dyne aluminum foil compatible with different coating systems?
A:
Yes. Our high dyne aluminum foil is compatible with:
PVDF-based slurry systems
Solvent-based coating systems
Water-based coating systems
It supports uniform slurry spreading and strong binder anchoring.
Q10: How does high dyne aluminum foil help reduce coating defects?
A:
High dyne surface energy improves:
Slurry wettability
Coating uniformity
Binder adhesion
This significantly reduces risks of:
Edge peeling
Powder shedding
Shrinkage or pinholes after drying
Delamination during calendaring
Q11: What quality controls are applied during production?
A:
Quality control includes:
Raw material inspection
Online thickness and surface monitoring
Dyne value testing (initial & aging)
Pinhole inspection
Surface cleanliness control
Production follows ISO requirements for battery-grade materials.
Q12: Can specifications be customized for different battery production lines?
A:
Yes. We offer customization for:
Dyne value level
Alloy and temper
Thickness and width
Slit size and roll configuration
Technical support is provided to match customer coating processes.
Q13: What storage conditions are recommended for high dyne aluminum foil?
A:
Recommended storage conditions:
Clean, dry environment
Stable room temperature
Original sealed packaging
Avoid direct sunlight and high humidity
Proper storage helps maintain stable dyne performance.
Q14: What packaging is used for export delivery?
A:
We use export-grade, moisture-proof seaworthy packaging, with clear labeling of alloy, temper, size, and batch number to ensure traceability during international shipment.
Q15: What applications is high dyne aluminum foil mainly used for?
A:
High dyne aluminum foil is widely used in:
Lithium-ion battery cathode current collectors
EV power batteries
Energy storage system (ESS) batteries
Sodium-ion battery electrode materials
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