HSMetal is scaling its battery‑foil value chain, as its wholly‑owned subsidiary KUNRUI TECHNOLOGY CO.,LTD moves its 12,000 tons‑per‑annum carbon‑coated aluminum foil High Peel Carbon Coated Aluminum Foil For Lithium Battery Cathode Current Collector project into installation and commissioning phase. The first two production lines will kick off commercial manufacturing in September, while all ten production lines are scheduled to complete installation and full‑scale operation in October.
Specialized in R&D and mass production of carbon‑coated aluminum foil - a critical cathode current‑collector material for lithium‑ion batteries - KUNRUI TECHNOLOGY supplies high‑performance materials for new‑energy vehicles, 3C consumer electronics, and electrochemical energy‑storage applications.
State-of-the-Art Manufacturing Capabilities
The new manufacturing workshop meets Class 100,000 clean‑room standards, delivering stable, high‑grade production conditions to consistently lift finished‑product quality. Equipped with state‑of‑the‑art coating equipment, the production lines run at a maximum processing speed of 150 meters per minute and support a maximum foil width of 1550 mm. Compared with the mainstream industry width of 1200 mm, the new lines deliver around 30 % higher production efficiency.
KUNRUI's carbon‑coated aluminum foil features low interfacial resistance and high peel strength, two core advantages for modern lithium‑ion cells. Lower resistance enables superior fast‑charging rate capability; robust peel strength prevents cathode active‑material powder shedding, effectively extending battery cycle life. These performance strengths make carbon‑coated aluminum foil an ideal upgraded current‑collector choice for lithium‑iron‑phosphate (LFP) batteries, which account for more than 60 % of global battery shipments. Carbon‑coated aluminum foil normally carries a 30‑50 % premium over standard bare battery‑grade aluminum foil.
Existing carbon‑coated aluminum foil production lines under HSMetal are already running at full capacity. The upcoming KUNRUI TECHNOLOGY project further extends HSMetal's battery‑foil industrial chain, expands market reach for high‑end battery‑collector materials, and injects fresh momentum into Luoyang's new‑energy‑materials industrial cluster.
Why Carbon-Coated Aluminum Foil Matters
Carbon-coated aluminum foil Positive Electrode Water-based Carbon Coated Aluminum Foilserves as an advanced positive electrode current collector for lithium-ion batteries. By applying a conductive carbon layer onto high-purity aluminum foil substrates, this technology delivers two core performance advantages:
- Low electrical resistance → Enables faster charging rates (a key metric for fast-charging capability)
- High peel strength → Prevents cathode material from shedding, extending cycle life
These properties make carbon-coated aluminum foil the preferred current collector upgrade for lithium iron phosphate (LFP) batteries, which currently account for over 60% of battery shipments. The material typically commands a 30–50% price premium over conventional battery aluminum foil, reflecting its superior performance value.
Key Performance Metrics
KUNRUI TECHNOLOGY's carbon-coated aluminum foil products demonstrate industry-leading performance:
- Low membrane resistance for enhanced conductivity
- Superior peel strength ensuring durable electrode adhesion
- Excellent solvent resistance compatible with NMP and electrolyte systems
- Full compatibility with various LFP and PVDF materials
These performance characteristics directly translate to improved battery charging rates and extended cycle life.
Strategic Market Impact
HSMetal's existing carbon-coated aluminum foil production lines are already running at full capacity. The commissioning of KUNRUI TECHNOLOGY's new facility will:
- Extend HSMetal's battery foil industry chain
- Enhance product market coverage capabilities
- Strengthen Luoyang's position in the new energy materials sector
The global carbon-coated aluminum foil market is experiencing unprecedented growth, driven by:
- Expanding electric vehicle battery manufacturing worldwide
- Increasing demand for high-performance energy storage solutions
- Rapid electrification of transportation systems
- Growing investments in gigafactories across Asia Pacific, Europe, and North America
According to industry data, global demand for carbon-coated aluminum foil reached 295,000 tons in 2025, growing approximately 72% year-over-year – significantly outpacing the ~40% growth rate of the broader lithium battery aluminum foil market.
For more details about HSMetal's carbon-coated aluminum foil pls view Conductive Coated Copper Foil for Electric Vehicle Batteries for more details
Key Performance Metrics of KUNRUI TECHNOLOGY's Carbon Coated Aluminum Foil?
KUNRUI TECHNOLOGY's products demonstrate industry-leading performance:
| Parameter | Specification |
|---|---|
| Aluminum foil thickness | 10–20 μm |
| Carbon coating thickness | 1–5 μm (optimized at ~1.0 μm for best cost-performance) |
| Surface resistivity | < 30 ohms per 25μm² |
| Coating type | Double-side or single-side available |
| Peel strength | ≥6.5 N/cm for carbon black coated foil (vs. 4.9 N/cm for bare foil) |
| Coating speed | Up to 150 m/min, significantly above the industry average of 30–40 m/min |
About HSMetal and KUNRUI TECHNOLOGY
HSMetal is a recognized supplier in conductive coated foils for the global lithium-ion battery sector. The company has independently developed multiple carbon-coated aluminum foil products through specialized surface treatment, formula optimization, and uniform coating technologies.
KUNRUI TECHNOLOGY CO., LTD – a wholly-owned subsidiary of HSMetal – specializes in the R&D and production of coated aluminum foil for new energy lithium battery positive electrode current collectors. These materials are widely applied across:
- New energy vehicles (EVs)
- 3C consumer electronics
- Electrochemical energy storage systems
With all ten production lines expected to be fully operational by October 2026, KUNRUI TECHNOLOGY is well-positioned to meet the surging global demand for high-performance carbon-coated aluminum foil. The project represents a significant step forward in advancing battery material technology and supporting the global transition to clean energy.
FAQ
Q1: What is carbon-coated aluminum foil and why is it important for lithium-ion batteries?
A:Carbon-coated aluminum foil (CCAF) is a composite material made by applying a conductive carbon layer-typically 1–5 μm thick-onto high-purity aluminum foil substrates. It serves as an advanced positive electrode current collector in lithium-ion batteries. The carbon coating significantly enhances electrical conductivity, reduces interfacial resistance between the current collector and active materials, and improves adhesion for electrode slurries. This technology is critical for enabling faster charging rates and longer battery cycle life-two of the most important performance metrics in today's EV and energy storage markets.
Q2: What types of carbon materials are used in the coating?
A:Common carbon materials include conductive carbon black, graphene, and carbon nanotubes (CNTs). Carbon black provides cost-effective conductivity enhancement, while graphene offers exceptional electron mobility, and CNTs create a 3D conductive network. KUNRUI TECHNOLOGY utilizes advanced formulations optimized for specific battery chemistries, with full compatibility across various LFP and PVDF materials.
Q3: What is the optimal carbon coating thickness?
A:Research indicates that a total carbon coating thickness of approximately 1.0 μm represents the optimal cost-performance choice. While thinner coatings (<50 nm) can show 15–20% higher resistance after 500 cycles, thicker coatings increase material costs without proportional performance gains.
Q4: Which battery chemistries benefit most from carbon-coated aluminum foil?
A:Carbon-coated aluminum foil is most widely used in lithium iron phosphate (LFP) batteries. LFP batteries currently account for over 60% of battery shipments, and the material addresses two critical challenges of LFP chemistry: low electronic/ionic conductivity and poor adhesion to current collectors. The technology is also used in ternary batteries and is increasingly adopted in energy storage systems and 3C consumer electronics.
Q5: Who is KUNRUI TECHNOLOGY and what is its relationship to HSMetal?
A:KUNRUI TECHNOLOGY CO., LTD is a wholly-owned subsidiary of HSMetal, specializing in the R&D and production of coated aluminum foil for new energy lithium battery positive electrode current collectors. HSMetal has independently developed multiple carbon-coated aluminum foil products through specialized surface treatment, formula optimization, and uniform coating technologies
Q6: What are the main applications of KUNRUI TECHNOLOGY's products?
A:The products are widely applied across:
- New energy vehicles (EVs) – improving battery energy density and fast-charging capability
- 3C consumer electronics – enhancing battery cycle life and safety
- Electrochemical energy storage systems – reducing internal resistance and improving system efficiency
Q7: How does carbon-coated aluminum foil improve battery fast-charging capability?
A:The carbon coating reduces interfacial contact resistance between the current collector and cathode active material. Lower resistance enables higher charging rates-a core metric for fast-charging performance. Studies show that carbon-coated foil can reduce AC internal resistance by 7.30 mΩ and DC internal resistance by 9–12 mΩ at the same state of charge.
Q8: How does it extend battery cycle life?
A:The carbon coating creates a strong bond between the active material and the current collector, preventing delamination and particle shedding during repeated charge-discharge cycles. It also suppresses side reactions with electrolytes and prevents aluminum dissolution in high-voltage (>4.2V) applications. The result is significantly extended cycle life-research shows a 1C/1C cycle performance improvement from 82.2% to 88.9% after 2,000 cycles.
Q9: What customization options are available?
A:KUNRUI TECHNOLOGY supports diversified customization including:
- Length, width, and thickness can be customized
- Single-side or double-side coating options
- Coating formulations tailored to specific battery chemistries
Q10: What is the typical delivery time?
A:Standard delivery time is 15–20 days based on inventory status.
Q11: What is the minimum order quantity (MOQ)?
A:The MOQ is 10 kg.
