High Purity 15 and 16 Micron Aluminum Foil for Battery Cathode Current Collector

Product Overview

This high-purity aluminum foil serves as a specialized cathode current collector substrate engineered specifically for lithium-ion battery research, pilot lines, and industrial-scale cell production. Available in 15 µm and 16 µm thickness profiles, the material provides an optimal balance between volumetric energy density maximization and robust mechanical handling during downstream roll-to-roll coating and calendering operations.

Manufactured with an ultra-pure aluminum composition reaching typical purity levels of 99.9%, this conductive foil provides outstanding chemical stability and corrosion resistance against aggressive battery electrolytes. The dual-surface topography features a calibrated roughness differential between the shiny and matte sides, ensuring superior physical anchoring of cathode slurries while maintaining low interfacial electrical resistance across the collector interface.

Designed to withstand the continuous web tension, drying profiles, and intense compaction pressures of modern electrode processing, the material guarantees zero pinhole defects and tight dimensional tolerances. Whether deployed in pouch cell prototyping, cylindrical winding, or prismatic stacking architectures, this foil substrate guarantees reliable electrochemical performance and high manufacturing yield.

Key Features

• Ultra-High Material Purity: Features a standard aluminum purity exceeding 99.0% with typical batches achieving ≥99.9%, significantly mitigating electrochemical side reactions and internal self-discharge mechanisms within active cells.
• Zero Pinhole Defect Architecture: Strict rolling and quality inspection protocols ensure zero pinhole penetration across the entire foil web, preventing electrolyte seepage and maintaining total mechanical integrity.
• Optimized Asymmetric Surface Roughness: Engineered with a controlled matte-side roughness ($R_a$ 0.35–0.75 µm, typical 0.4 µm) and a smooth shiny side ($R_a$ ≤0.4 µm, typical 0.24 µm) to promote superior active material slurry adhesion without micro-cracking.
• Exceptional Tensile Strength: Delivers a typical tensile strength of 24 kg/m² (guaranteed ≥15 kg/m²), offering the high mechanical resilience necessary to prevent web breakage during high-speed continuous coating and precision calendering.
• Optimized Room-Temperature Elongation: Achieves a typical elongation rate of 4.2% (spec ≥3.5%), accommodating dynamic expansion and contraction stresses during cell charge-discharge cycling without delamination.
• Tight Dimensional Uniformity: Features an areal mass density of 38–42 g/m² with a strict thickness tolerance of 0–1 µm, ensuring exceptional consistency in volumetric capacity and active loading across large production batches.
• Balanced H16/H18 Temper Condition: Cold-rolled to precise work-hardened tempers to provide structural stiffness during slot-die or doctor-blade coating while preserving sufficient ductility for tab welding and winding.

Applications

Technical Specifications

Why Choose This Product

• Engineered Substrate Purity: Refined using advanced metallurgical processing to eliminate trace metallic contaminants, ensuring consistent electrochemical stability even under aggressive high-voltage cathode operation.
• Superior Web Handling and Processability: High tensile strength and strict elongation parameters virtually eliminate foil breakage, line stoppages, and edge wrinkling on automated coating and calendering equipment.
• Precision Surface Topography: Micro-engineered roughness promotes exceptional mechanical interlocking with high-viscosity battery slurries, effectively eliminating delamination during post-drying winding and high-pressure compaction.
• Exacting Batch Consistency: Narrow areal weight tolerances and micro-gauge precision ensure uniform current density and reproducible electrochemical data across fundamental research and pilot manufacturing.
• Tailored Dimensional Flexibility: Available in both pre-cut precision sheets for laboratory pouch cell fabrication and continuous master rolls for pilot roll-to-roll production lines.

Contact our technical engineering team today to request a quote, order sample batches, or discuss customized width, length, and packaging specifications tailored to your battery development line.

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