Single Layer Wet Process 8μm 12μm PE Battery Separator Film

Product Overview

This high-purity polyethylene (PE) battery separator represents a critical advancement in materials engineering for high-energy-density electrochemical systems. Manufactured via an advanced single-layer wet orientation process, this microporous membrane provides a uniform pore architecture and superior mechanical integrity. The separator establishes a reliable physical barrier between positive and negative electrodes, effectively preventing electrical short circuits while facilitating rapid, unhindered lithium-ion transport across the cell matrix.

Engineered specifically for next-generation lithium-ion battery research, pilot-line assembly, and commercial manufacturing, this membrane serves diverse cell form factors, including pouch cells, cylindrical cells, and prismatic configurations. Its precision-engineered microstructure caters to high-rate consumer electronics, electric vehicle (EV) traction battery testing, high-voltage energy storage systems (ESS), and advanced materials research across institutional and industrial laboratories.

Every roll of this Grade-A separator is manufactured under stringent cleanroom protocols to ensure a pristine, contaminant-free surface with flawless flatness. Designed to withstand rigorous automated winding, high-tension stacking, and harsh electrolyte environments, the membrane demonstrates exceptional chemical stability, high puncture strength, and minimal thermal shrinkage under elevated temperatures, ensuring uncompromised cell safety and long-term cycling consistency.

Key Features

• Precision Wet-Process Microporous Architecture: Engineered using an advanced single-layer wet stretching technique, this separator delivers a uniform pore distribution with high interconnected porosity (40% to 45%), minimizing internal cell resistance and optimizing ionic conductivity.
• Superior Mechanical Tensile Strength: The biaxially oriented polyethylene matrix provides robust longitudinal (MD) and transverse (TD) tensile properties, resisting mechanical deformation and tension-induced tearing during high-speed automated cell winding and prismatic winding operations.
• Exceptional Puncture Resistance: Exhibiting puncture resistance ratings up to ≥300g for 8μm variants and ≥450g for 12μm variants, this membrane reliably halts micro-dendrite growth and particulate penetration, preventing catastrophic internal short circuits.
• Controlled Air Permeability and Uniform Tortuosity: With tight air permeability tolerances (120±50 s/100ml for 8μm; 150±50 s/100ml for 12μm), the membrane promotes uniform current density distribution across active electrode surfaces, effectively eliminating local hot spots and capacity fading.
• High Thermal Stability and Low Shrinkage: Demonstrates minimal thermal retraction under elevated temperature regimes (TD shrinkage ≤1.0–1.5% at 90°C and ≤1.5% at 130°C for 1 hour), maintaining physical barrier integrity during severe thermal abuse conditions.
• High Chemical and Electrochemical Inertness: Built from premium high-molecular-weight polyethylene, the material exhibits full chemical stability when exposed to organic carbonate solvents and lithium hexafluorophosphate (LiPF6) electrolyte solutions across wide operating voltage windows.
• Pristine Grade-A Surface Quality: Supplied as 1000-meter continuous continuous rolls with uniform web tension, completely free of pinholes, wrinkles, edge burrs, static attraction, and foreign particulate contamination.
• Optimized Areal Density and Thickness Uniformity: Ultra-thin profiles with stringent thickness tolerances ensure tight volumetric cell packaging, directly maximizing overall gravimetric and volumetric energy density in compact cell formats.

Applications

Technical Specifications

Why Choose This Product

• Engineered for High-Yield Cell Assembly: Manufactured with tight physical and dimensional tolerances, this membrane minimizes line stoppages and web breakage during automated winding and z-stacking processes, substantially improving pilot-line and production yields.
• Stringent Quality and Cleanliness Standards: Produced in cleanroom environments with automated optical defect inspection, each roll guarantees zero metallic particles, pinholes, or surface contaminants that could compromise cell safety or accelerate self-discharge.
• Optimized Electrochemical Kinetics: The controlled pore distribution and high electrolyte wettability ensure rapid electrolyte uptake and complete saturation, promoting homogeneous current distribution, reducing internal impedance, and extending overall cycle life.
• Flexible Slitting and Roll Formatting: Available in standardized research widths as well as tailored slitting dimensions to match precise pouch cell, prismatic, or cylindrical winding machine tooling specifications.
• Complete Energy Storage Workflow Support: Backed by comprehensive technical expertise across electrode preparation, cell assembly, and testing workflows, our engineering team assists you in selecting the ideal separator specifications for your chemistry and form factor.

Contact our technical sales team today to request a quotation, inquire about customized slitting widths, or discuss sample rolls for your battery manufacturing and R&D requirements.

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