High Purity 30μm Etched Aluminum Foil for Supercapacitors and Advanced Energy Storage

Product Overview

This 30μm etched aluminum foil is an engineered current collector substrate developed specifically for high-performance supercapacitors, advanced energy storage devices, and electronic capacitors. Manufactured through an electrochemical etching process, the substrate exhibits an isotropic three-dimensional honeycomb surface morphology that significantly expands the effective microscopic surface area. This micro-porous architecture maximizes the mechanical interlocking between current collector and active electrode slurries, ensuring uniform interfacial contact and eliminating delamination risks during rapid cycling.

Designed for demanding electrochemical environments, the material addresses core operational bottlenecks including contact impedance, localized Joule heating, and capacity fade under high-rate charge and discharge regimes. By establishing a continuous, low-resistance conductive network, the etched foil accelerates electron transfer kinetics and enhances heat dissipation away from active cell cores. Target industries include electrochemical energy storage, hybrid automotive powertrains, high-voltage pulse electronics, and grid-scale power stabilization systems where energy density, power capability, and thermal stability are essential.

Manufactured under stringent quality management frameworks compliant with GB/T5230-1995 and IEC international standards, the substrate delivers metallurgical purity, tight dimensional tolerance, and reliable mechanical ductility. Whether utilized in automated continuous roll-to-roll electrode coating lines or specialized high-rate pouch and cylindrical cell fabrication, this material ensures processing yield, batch-to-batch repeatability, and extended operating life under rigorous electrical and thermal stresses.

Key Features

• Micro-Engineered Honeycomb Structure: Advanced electrochemical etching creates dense, uniform three-dimensional micro-cavities across the substrate surface, maximizing active surface area and promoting deep mechanical anchoring of electrode coatings.
• Significantly Reduced Internal Resistance: The enhanced interfacial contact area between the current collector and active material drastically lowers interfacial contact resistance and overall equivalent series resistance (ESR).
• Superior Thermal Dissipation: Optimized conductive mass and uniform microscopic surface textures facilitate rapid heat transfer, suppressing localized thermal hotspots during continuous high-rate charging and discharging.
• Enhanced Active Material Adhesion: High microscopic roughness (typical Rz 5.0 μm) provides robust peel resistance (typical 1.0 N/mm), preventing active material spalling, flaking, or delamination during high-speed calendering and cyclic expansion.
• Ultra-High Metallurgical Purity: With an aluminum purity exceeding 99.95% (typical), the substrate minimizes parasitic electrochemical side reactions, micro-corrosion, and gas generation over prolonged service.
• Exceptional Mechanical Flexibility: High tensile strength (typical 3.0 kg/cm) combined with excellent bending endurance (typical 90 cycles) ensures tear-free transport on automated roll-to-roll coating and winding machinery.
• High-Temperature Dimensional Stability: A high-temperature elongation rating of 3.0% (typical) maintains structural flatness and mechanical integrity during slurry drying, heat curing, and vacuum baking processes.
• Strict Quality Compliance: Certified according to GB/T5230-1995 and IEC standards, guaranteeing reproducible electrochemical characteristics, uniform mass resistivity, and consistent specific capacitance values across production lots.

Applications

Technical Specifications

General Physical and Electrochemical Characteristics

Specific Capacitance Classification

Recommended Storage and Handling Conditions

Why Choose This Product

• Micro-Engineered Adhesion Interface: The precisely controlled honeycomb etching creates a mechanical locking effect that doubles active material peel strength compared to standard bare foil, eliminating coating delamination during calendering and cycling.
• Exceptional Electrochemical Conductivity: With a typical mass resistivity of just 0.0294 Ω·g/m² and purity exceeding 99.95%, this substrate delivers ultra-low ohmic losses, preventing voltage drop and thermal runaway during intense charge-discharge cycles.
• Robust High-Speed Processability: High tensile strength (3.0 kg/cm) and outstanding flexibility (90 bending cycles) minimize web breaks and downtime on modern high-tension, high-speed automated coating and slitting lines.
• Broad Specific Capacitance Options: Multiple standardized capacitance grades (20 to 40 μF/cm²) allow precise cell design optimization across energy-dense, power-dense, and hybrid capacitor architectures.
• Stringent Quality Certification: Fully compliant with GB/T5230-1995 and IEC standards, ensuring metallurgical consistency, pore uniformity, and predictable electrochemical performance across every production batch.

Contact our technical engineering team today to request material samples, discuss specific capacitance grading requirements, or receive a tailored quotation for your commercial manufacturing line.

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