GF/A Glass Fiber Battery Separator Base Film 260μm, 25 mm Diameter, 100 Sheets
Product Overview
Binder-free glass fiber separator sheet supplied as GF/A‑1820‑025(diameter 2.5cm)100 sheets. The source data describes filtration performance and battery-separator applications.
Product Details
| Product name | GF/A Glass Fiber Battery Separator Base Film 260μm, 25 mm Diameter, 100 Sheets |
| Source specification | GF/A‑1820‑025(diameter 2.5cm)100 sheets |
| Process / coating side | Uncoated; no coating specified |
| Material | Glass fiber filter paper GF/A |
| Diameter | 25 mm |
| Pack quantity | 100 sheets |
| Pore size | 1.6 μm |
| Thickness | 260 μm |
| Working temperature | <500 °C |
| Filtration speed | 62 Herzberg (sec) |
| Air flow | 4.3 Gurley (sec) |
| Basis weight | 55 g/m² |
| Retention efficiency | >99.95% |
Additional Information
Binder-free material with good fine-particle retention, fast flow, and high loading capacity. GF/A supports precision filtration of dissolved pharmaceutical powders, wastewater and air-pollution testing, algae and bacterial culture, food analysis, protein filtration, beta-radioactive immunoassay, radioactive iodine, vehicle exhaust collection, PM2.5, PAHs, BaP, and PCB measurement. It is also used as a lithium-ion battery separator and in battery-material quality control.
Important Note
Note: Slight variations may occur between different production lots of the battery separator. The performance indicators are guaranteed to comply with our product specifications.
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| Compare nearby specifications | Glass Fiber Battery Separator Base Film 290μm, 120 mm x 100 m | Same Glass fiber separator family for direct specification comparison. |
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TAILORED SOLUTIONS FOR RESEARCH
Contact our engineering team for technical support or official institutional quotations.
EMAIL: inquiry@atomfair.com
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Manufacturer: Atomfair LLC
Brand: ATOMFAIR®
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This binder-free glass fiber separator is electrochemically compatible with lithium-ion battery electrolyte systems but exhibits a pore size of 1.6 μm and thickness of 260 μm that impose physical constraints on ionic transport and mechanical integrity. Slight performance variations between production lots require lot-specific validation for critical battery applications.
- Electrolyte compatibility constraint: The separator's glass fiber matrix is chemically inert to common lithium-ion battery electrolytes but may exhibit wetting variability due to lot-dependent surface chemistry.
- Mechanical handling constraint: Dry handling is required to prevent fiber breakage or delamination, as the 260 μm thickness provides limited mechanical robustness under compression.
- Thermal stability constraint: The material withstands working temperatures below 500 °C but must be assembled into cells under dry-room or glovebox conditions to avoid moisture adsorption.
This procedure outlines dry handling, electrolyte wetting, and cell assembly steps for the 25 mm diameter glass fiber separator. Proper technique minimizes mechanical damage and ensures consistent electrochemical performance.
Required Equipment: Argon-filled glovebox or dry room with dew point below -40 °C, Clean stainless steel tweezers or vacuum pickup tool, Electrolyte dispensing pipette (100-200 μL)
- Inspect the separator sheets
Inspect each 25 mm diameter separator under bright light for visible defects such as tears or fiber clumps before use. - Transfer separators to the glovebox
Transfer the sealed pack of separators into the argon-filled glovebox and allow them to equilibrate for at least 1 hour to desorb ambient moisture. - Place the separator in the cell casing
Place one separator centrally onto the anode or cathode electrode using tweezers, ensuring no folds or air pockets form. - Dispense electrolyte evenly
Dispense 100-200 μL of electrolyte onto the separator surface, allowing the liquid to wick uniformly through the 1.6 μm pores. - Verify full wetting before sealing
Verify the separator appears uniformly translucent with no dry spots before assembling the counter electrode and sealing the cell.
What is the retention efficiency and pore size of the GF/A glass fiber battery separator base film, and how does this affect its use in battery applications?
The GF/A separator has a retention efficiency of >99.95% and a pore size of 1.6 μm, as stated in the product specifications. This high retention efficiency ensures effective particle capture, which is critical for preventing internal short circuits in lithium-ion batteries. The 1.6 μm pore size balances ionic flow with particle barrier properties, making it suitable for battery separator applications where fine-particle retention is required.
Can this 25 mm diameter, 260 μm thick glass fiber separator be used in lithium-ion battery assembly, and what are its key compatibility constraints?
Yes, the product is explicitly described as suitable for use as a lithium-ion battery separator and in battery-material quality control. The 25 mm diameter and 260 μm thickness are specified for coin-cell or small-format battery assembly. However, the separator is uncoated and binder-free, so it must be handled carefully to avoid damage, and its performance may vary slightly between production lots, though it is guaranteed to meet the stated specifications.
What are the handling, safety, and storage requirements for this glass fiber separator, given its thermal and mechanical properties?
The separator has a working temperature of <500 °C, indicating high thermal stability, but it is a fragile glass fiber material that requires careful handling to prevent tearing or contamination. It is binder-free, so no organic binders are present, but it should be stored in a dry, clean environment to maintain its integrity. The product is supplied as 100 sheets of 25 mm diameter discs, and slight lot-to-lot variations are possible, so it is recommended to handle with clean tools and store in original packaging when not in use.
This 260 μm, 25 mm diameter GF/A glass fiber separator offers a 1.6 μm pore size and >99.95% retention efficiency, making it suitable for both precision filtration and lithium-ion battery separator applications. Its binder-free construction and high thermal stability (up to 500 °C) support use in diverse analytical and electrochemical processes, though the 100-sheet pack size and lot-to-lot variability require consideration for high-throughput or consistency-critical workflows.
Positive
- Binder-free high-purity construction: The absence of binders eliminates potential contamination sources, making it suitable for sensitive applications like battery-material quality control and trace-level filtration where extractables could interfere with results.
- High thermal stability up to 500°C: With a working temperature below 500°C, this separator can withstand high-temperature processes, enabling use in applications such as combustion analysis or high-temperature filtration without material degradation.
Trade-offs
- Lot-to-lot thickness variability: Slight variations may occur between production lots, which could affect separator thickness consistency and, consequently, electrochemical performance in battery applications where uniform compression is critical.
- Limited pack size for scale-up: Supplied as 100 sheets per pack, this format may be insufficient for high-throughput or pilot-scale operations, requiring multiple orders and increasing the risk of batch-to-batch inconsistencies.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
