Hybrid Coated Separator 7+2+1μm

Product Overview

The Hybrid Coated Separator 7+2+1 μm from Huizhou BestGemo New Energy is a dual-functional separator engineered for premium power and energy-storage battery systems. This product integrates a ceramic coating and a polyvinylidene fluoride (PVDF) layer onto a base film, delivering a balanced combination of thermal stability and adhesion. The ceramic component enhances the separator's resistance to high-temperature shrinkage, while the PVDF layer provides strong bonding to electrodes, reducing interfacial resistance and improving cell integrity during cycling.

Designed for manufacturers who require both safety and performance, this 7+2+1 μm configuration—comprising a 7 μm base film with a 2 μm ceramic layer and a 1 μm PVDF layer—offers an ultra-thin profile that maximizes volumetric energy density while maintaining robust thermal and mechanical properties. With a controlled porosity of 40±5% and a peel strength of ≥40 N/m, this product supports consistent electrolyte wetting and reliable adhesion throughout the battery's operational life.

Key Features

• Hybrid coating architecture combines ceramic particles for thermal dimensional stability with a PVDF layer for enhanced electrode bonding.
• Ultra-thin 7+2+1 μm design enables high-energy-density cell configurations, making it ideal for compact and lightweight battery packs.
• 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.
• Balanced mechanical and thermal properties contribute to safer battery operation under elevated temperatures and mechanical stress, even at reduced thickness.

Technical Specifications

Applications

This 7+2+1 μm hybrid coated separator is particularly suitable for cell formats where both thermal runaway prevention and electrode adhesion are critical, while also demanding minimal separator thickness. It addresses the growing demand for separators that can withstand aggressive charging cycles while maintaining a stable electrode-separator interface in space-constrained designs.

• High-capacity power batteries for electric vehicles and plug-in hybrids requiring fast-charging capability and robust safety margins, where every micron of thickness matters for energy density.
• Thin-cell designs for compact consumer electronics, portable power packs, and wearable devices that require slim form factors without compromising safety.
• Stationary energy storage systems where long-cycle-life and thermal stability are prioritized, and where thinner separators allow for increased cell capacity within fixed module dimensions.
• High-voltage lithium-ion cells that benefit from reduced interfacial resistance between separator and electrodes, particularly in high-rate discharge applications.

Quality Assurance

• Every production batch undergoes strict process control to ensure consistent thickness, porosity, and coating uniformity across the 7+2+1 μm configuration.
• 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, especially for thin-film processing.
• 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 7+2+1 μm platform. 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.