PVDF Coated Separator 20+2μm

Product Overview

The PVDF Coated Separator 20+2μm from Huizhou BestGemo New Energy is an advanced membrane solution engineered for high-rigidity and long-cycle lithium cells. This separator features a precise polyvinylidene fluoride (PVDF) coating applied to both sides of a 20μm base film, with a 2μm functional layer on each side, creating a total thickness of 24μm. This dual-side coating configuration significantly improves the interface between the separator and both electrodes, enhancing adhesion and electrolyte wettability across the entire cell stack. By stabilizing the electrode-separator interface, this product directly addresses common performance bottlenecks in modern lithium battery design, offering manufacturers a reliable component for demanding energy storage applications.

Constructed in the 20+2μm configuration, this PVDF coated separator is optimized for use in cells where mechanical integrity and electrochemical stability are critical, particularly for thicker electrode stacks or larger format cells that require additional structural support. The coating not only bonds firmly to the electrode surface but also promotes rapid and uniform electrolyte absorption, which is essential for reducing internal resistance and maintaining consistent ion transport over time. This product is suitable for battery producers seeking a drop-in separator solution that improves processability and final cell reliability without requiring significant modifications to existing assembly lines.

Key Features

• Enhanced Electrode Adhesion: The dual-side PVDF coating provides a strong bond between the separator and both electrode layers, helping maintain electrode stack integrity during charge-discharge cycles and reducing the risk of delamination in high-rigidity cell designs.
• Superior Electrolyte Wettability: The porous PVDF layer on both surfaces facilitates faster and more thorough electrolyte uptake compared to standard polyolefin separators, ensuring consistent ionic conductivity across the entire electrode area.
• Improved Cycle Life: By stabilizing the electrode-separator interface on both sides and promoting uniform electrolyte distribution, this separator contributes to reduced capacity fade and extended operational lifespan in long-cycle lithium cells.
• Controlled Porosity: With a porosity range of 38% to 40%, the separator offers an optimal balance between ionic permeability and mechanical strength, supporting efficient lithium-ion transport while maintaining physical robustness.
• Customizable Peel Strength: Peel strength can be tailored to specific requirements (N/m) to match different electrode chemistries and cell assembly processes, allowing for integration flexibility across a range of battery formats.
• Robust Thickness Profile: The 20+2μm configuration provides enhanced mechanical support and dimensional stability for larger format cells, while the 2μm coating on each side ensures adequate adhesion without compromising ionic conductivity.

Technical Specifications

Applications

This PVDF coated separator in the 20+2μm configuration is specifically designed for use in lithium batteries that demand high structural rigidity and prolonged service life, particularly in larger format cells where the thicker base film provides additional mechanical support. It is especially well-suited for cells subjected to repeated cycling, moderate-to-high discharge rates, and environments where dimensional stability of internal components is essential. The product performs reliably in both prismatic and cylindrical cell formats where electrode adhesion directly impacts safety and performance.

• High-capacity energy storage cells for grid backup or renewable integration, where larger electrode stacks benefit from the thicker separator profile.
• Long-cycle power batteries for electric vehicles and industrial equipment requiring enhanced mechanical integrity.
• Portable energy storage systems requiring stable discharge characteristics and extended operational life.
• Specialty lithium cells for aerospace, marine, or high-vibration applications where dimensional stability is critical.
• Custom battery packs where enhanced electrode bonding prevents internal short circuits over extended use, particularly in large-format prismatic cells.

Quality Assurance

• Strict quality management is implemented throughout every stage of production, from raw material receiving to final packaging, ensuring consistency in thickness, porosity, and coating uniformity.
• Each batch undergoes full inspection prior to shipment, including verification of dimensional specifications and physical properties, so that only conforming product reaches your facility.
• Sampling and testing protocols are aligned with the reference parameters supplied, allowing for traceable accuracy in porosity and peel strength reporting.
• Technical support is available to assist with integration questions, and product samples can be provided upon request for evaluation under your specific cell manufacturing conditions.

OEM/ODM Customization

Huizhou BestGemo New Energy supports OEM and ODM projects involving the PVDF coated separator in the 20+2μm configuration. We can adjust the peel strength specification to match your electrode coating formulation and assembly method, and we work with you to confirm the appropriate thickness option for your cell design. Custom roll dimensions, core sizes, and packaging formats are also available upon request to align with your production line requirements. Our engineering team is prepared to discuss your application details and provide tailored guidance without obligating you to a minimum order commitment.