Battery supporting materials
16 Micron Carbon Coated Aluminum Foil for Lithium Ion Battery Current Collector
Item Number : FZ17
Price varies based on specs and customizations
- Thickness Configuration
- 18 μm (1 μm Carbon + 16 μm Al + 1 μm Carbon)
- Tensile Strength
- ≥ 180 N/mm² (Measured: 199.94 N/mm²)
- Areal Density
- 42 ± 2 g/m²
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Product Overview
This 16 micron carbon coated aluminum foil is a specialized current collector substrate engineered for advanced lithium-ion battery cathode fabrication. Utilizing a continuous double-sided carbon coating process, the foil features an ultra-thin conductive carbon layer (1 µm per side) applied uniformly to a 16 µm high-purity aluminum core, delivering an 18 µm total composite thickness. By establishing an intimate microscopic conductive bridge between the active cathode materials and the metallic current collector, this substrate significantly reduces interfacial resistance and optimizes charge transfer kinetics.
Designed for demanding energy storage and mobility applications, the material resolves core electrochemical bottlenecks in commercial cell manufacturing, including high dynamic internal resistance (DCR) growth and active material delamination during prolonged cycling. Its optimized surface chemistry accommodates diverse cathode formulations—including lithium iron phosphate (LFP), nickel-manganese-cobalt (NMC), and lithium cobalt oxide (LCO)—ensuring tight pack voltage consistency and lower operational degradation across demanding fast-charge cycles.
Manufactured under rigorous cleanroom standards with strict mechanical and chemical quality controls, the substrate demonstrates exceptional tensile properties, low trace metal contamination, and superior coating adhesion. It delivers the mechanical resilience required for high-speed continuous roll-to-roll coating, calendering, and winding operations, providing battery engineers and procurement managers with a reliable, high-yield material solution for commercial-scale production.
Key Features
- Double-Sided Continuous Carbon Deposition: Features a precisely controlled 1 µm conductive carbon matrix on both sides of a 16 µm high-purity aluminum foil, providing continuous electronic conductivity while mitigating micro-scale contact resistance.
- Dynamic Internal Resistance (DCR) Suppression: The functional carbon interfacial layer significantly impedes dynamic internal resistance growth during continuous cycling, maintaining high rate discharge efficiency and reducing cell polarization.
- High Surface Energy & Dyne Value: Exhibits a surface tension value of ≥40 Dyne (typical 55 Dyne), promoting superior wettability for active cathode slurries and preventing pinholes, edge crawling, or delamination during high-speed coating.
- Exceptional Mechanical Tensile Properties: Delivers a tensile strength of ≥180 N/mm² (measured at 199.94 N/mm²) and an elongation rate exceeding 1.5% (measured at 2.83%), minimizing web breakage during high-tension calendering and high-speed automated slitting.
- Strict Trace Impurity Control: Limits iron content within the conductive coating to ≤50 ppm (measured at 12 ppm), mitigating the risk of micro-short circuits and self-discharge within assembled cells.
- Robust Coating Adhesion: Demonstrates superior mechanical bonding withstanding over 200 cycles of solvent wipe testing without flaking, powder shedding, or carbon loss during downstream handling.
- Precision Edge Margins for Tab Welding: Formulated with an exact 287 mm functional coating zone flanked by symmetrical 28 mm uncoated edge margins (343 mm total foil width) and misalignment ≤1.0 mm to support automated tab welding and cell assembly.
- Enhanced Battery Pack Consistency: Stabilizes voltage differential consistency across multi-cell battery packs, directly improving module cycle life and reducing system balancing overhead.
Applications
| Application | Description | Key Benefit |
|---|---|---|
| High-Rate EV & HEV Battery Cells | Integrated into high-capacity prismatic and cylindrical traction battery cells (e.g., NMC, LFP) subjected to severe charge/discharge duty cycles. | Drastically reduces dynamic DCR increase and cell heat generation during 3C+ fast charging, enhancing thermal safety and pack life. |
| Grid-Scale Energy Storage Systems (ESS) | Deployed as the cathode substrate in stationary energy storage modules requiring thousands of continuous deep-discharge cycles. | Maximizes capacity retention and cell-to-cell voltage consistency, reducing maintenance costs and pack degradation over multi-year deployments. |
| Commercial 3C Consumer Electronics | Applied in compact pouch cell configurations for smartphones, laptops, and ultra-thin portable electronic devices. | Improves volumetric energy density and adhesion strength, preventing electrode peeling during repeated thin-form flexing and fast-charging cycles. |
| Industrial High-Power Tool Battery Packs | Utilized in power tool packs delivering sustained high-current burst outputs under severe mechanical vibration. | Provides high mechanical tensile integrity and robust coating adhesion that prevents active mass shedding under cyclic vibrational stress. |
| Hybrid Supercapacitors & Ultracapacitors | Used as an electrode current collector substrate in asymmetric supercapacitors and hybrid pseudocapacitor devices. | Bridges interfacial contact resistance between high-surface-area carbons and metal substrates, optimizing frequency response and power density. |
| Advanced Solid-State & Semi-Solid Batteries | Serves as a stable interfacial substrate in developmental solid-electrolyte battery architectures. | Enhances solid-solid interface contact and prevents void formation at the cathode-collector boundary under high stack pressures. |
Technical Specifications
| Parameter Category | Specification Standard | Measured Quality Value | Test Method / Equipment |
|---|---|---|---|
| Product Identifier | FZ17 | FZ17 | Standard Tracking |
| Product Structure | Double-Sided Silver-Gray Carbon Coated Aluminum Foil | Conforming | Visual & Microscopic Inspection |
| Coating Type | Continuous Double-Sided Carbon Deposition | Conforming | Process Control Audit |
| Layer Thickness Configuration | (1.0 + 16.0 + 1.0) μm | Total: 18.0 μm | High-Precision Digital Micrometer |
| Areal Density | 42 ± 2 g/m² | 42.7 g/m² | Analytical Balance (0.1 mg Precision) |
| Total Foil Width | 343 ± 1 mm | 343 mm | Precision Steel Ruler |
| Coating Width | 287 ± 1 mm | 287 mm | Precision Steel Ruler |
| Left Uncoated Margin | 28 ± 1 mm | 28 mm | Precision Steel Ruler |
| Right Uncoated Margin | 28 ± 1 mm | 28 mm | Precision Steel Ruler |
| Coating Misalignment | ≤ 1.0 mm | 0.1 mm | Optical Alignment / Precision Gauge |
| Surface Energy (Dyne Value) | ≥ 40 Dyne | 55 Dyne | Dyne Test Pen |
| Elongation at Break | > 1.5 % | 2.83 % | Electronic Tensile Testing Machine |
| Tensile Strength | ≥ 180 N/mm² | 199.94 N/mm² | Electronic Tensile Testing Machine |
| Coating Iron (Fe) Contamination | ≤ 50 ppm | 12 ppm | Trace Metal Detection Spectrometer |
| Coating Adhesion Durability | ≥ 200 Wipes | Passed (No Loss / Shedding) | Solvent Friction & Wipe Adhesion Tester |
| Surface Appearance | Uniform silver-gray, free of streaks, bare spots, pinholes, or severe oxidation | Pass | High-Definition Optical Inspection |
| Packaging Standard | Vacuum-sealed, moisture-barrier wrapping with reinforced shock protection | Intact, no mechanical or moisture damage | Pre-Shipment Integrity Verification |
| Storage Recommendations | Sealed environment at ≤50°C, dry and well-ventilated, protected from sunlight, open flame, and thermal sources | Applicable | Warehouse Protocol |
Why Choose This Product
- Engineered Interfacial Performance: Designed specifically to eliminate cathode contact resistance, this substrate stabilizes high-rate electrochemical performance and suppresses battery capacity degradation over thousands of duty cycles.
- Superior Cleanliness and Defect Prevention: With iron contamination controlled to a low 12 ppm and flawless surface tension uniformity, the foil drastically reduces internal micro-shorts and scrap rates during cell manufacturing.
- High-Yield Manufacturing Compatibility: Excellent tensile strength (199.94 N/mm²) and low misalignment (0.1 mm) guarantee smooth integration into high-speed slitting, coating, and continuous winding production lines without web breakage.
- Comprehensive Battery Ecosystem Integration: Perfectly aligned with advanced slurry preparation, continuous slot-die coating, and precision calendering workflows for scalable lithium-ion battery manufacturing.
Contact our technical sales team today to request material samples, obtain detailed batch test reports, or discuss custom slitting and coating width specifications for your production line.
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