Hybrid Coated Separator 16+4+1μm

Product Overview

The Hybrid Coated Separator (Ceramic + PVDF) from Huizhou BestGemo New Energy is a dual-functional separator engineered for premium power and energy-storage battery systems. This specific variant, with a total thickness of 16+4+1 μm, integrates a ceramic coating and a polyvinylidene fluoride (PVDF) layer onto a base film, delivering a balanced combination of thermal stability and adhesion. The thicker ceramic layer (16 μm) provides enhanced resistance to high-temperature shrinkage, while the PVDF layer (4 μm) offers strong bonding to electrodes, reducing interfacial resistance and improving cell integrity during cycling. The additional 1 μm base film ensures mechanical support and dimensional stability.

Designed for manufacturers who require both safety and performance, this 16+4+1 μm configuration is particularly suited for high-capacity cells where thermal runaway prevention and electrode adhesion are critical. With a controlled porosity of 40±5% and a peel strength of ≥40 N/m, this separator supports consistent electrolyte wetting and reliable adhesion throughout the battery’s operational life, making it an ideal choice for demanding applications such as electric vehicles and grid-scale energy storage.

Key Features

• Hybrid coating architecture combines a thicker ceramic layer (16 μm) for superior thermal dimensional stability with a PVDF layer (4 μm) for enhanced electrode bonding.
• The 16+4+1 μm thickness configuration offers a balanced trade-off between mechanical strength, ionic conductivity, and energy density, suitable for high-capacity cells.
• Porosity maintained at 40±5%, facilitating uniform electrolyte uptake and ion transport across the separator membrane.
• Peel strength of ≥40 N/m ensures robust adhesion to electrodes, minimizing the risk of layer separation during cell assembly and operation.
• Enhanced thermal stability due to the thicker ceramic layer, contributing to safer battery operation under elevated temperatures and mechanical stress.

Technical Specifications

Applications

This hybrid coated separator variant is particularly suitable for cell formats where both thermal runaway prevention and electrode adhesion are critical. The thicker ceramic coating provides an extra margin of safety, making it ideal for high-energy-density batteries that operate under aggressive charging cycles or elevated temperatures.

• High-capacity power batteries for electric vehicles and plug-in hybrids requiring fast-charging capability and robust safety margins.
• Stationary energy storage systems where long-cycle-life and thermal stability are prioritized, especially in large-format cells.
• High-voltage lithium-ion cells that benefit from reduced interfacial resistance between separator and electrodes.
• Applications requiring enhanced mechanical integrity, such as pouch cells and prismatic cells with high stack pressure.

Quality Assurance

• Every production batch undergoes strict process control to ensure consistent thickness, porosity, and coating uniformity across all separator configurations.
• Each shipment is subject to full inspection prior to dispatch, verifying that physical properties meet the specified ranges for porosity and peel strength.
• Technical support is available to assist with product integration, handling guidelines, and troubleshooting during cell assembly.
• Samples can be provided upon request for evaluation, allowing customers to verify performance under their specific processing and testing conditions.

OEM/ODM Customization

Huizhou BestGemo supports OEM and ODM requests for separator specifications, including adjustments to coating thickness ratios (ceramic-to-PVDF), base film selection, and roll dimensions. For the 16+4+1 μm variant, we can fine-tune the ceramic or PVDF layer thickness to meet specific thermal or adhesion requirements. Custom width, core size, and winding tension can be aligned with your existing production line. Please contact our engineering team with your target parameters—we will evaluate feasibility and provide tailored recommendations based on your battery chemistry and assembly process.