DiffuLayer™ AGM Glass Fiber Separator Absorbent Glass Mat Battery Separator
An absorbent glass-fiber separator designed for battery research, material screening, and small-cell assembly. Available in round and rectangular/square sheet formats with multiple thicknesses and pack quantities, making it easier to select by cell dimensions, electrolyte-retention requirements, assembly space, and experimental volume.
Product Overview
From small laboratory-scale separator discs to 100 × 100 mm square sheets, options can be selected according to cell architecture, available thickness space, and experimental batch size.
AGM (Absorbent Glass Mat) separators use a glass-fiber network to form a porous, electrolyte-absorbing structure that can provide physical separation between electrodes while retaining electrolyte. The product is supplied as sheet material for convenient cutting, stacking, and rapid laboratory assembly.
Current standard sizes include Φ18 mm round discs, 100 × 88 mm rectangular sheets, and 100 × 100 mm square sheets, with available thicknesses including 0.5, 0.6, 1.0, 1.2, 1.5, and 2.0 mm.
Separator thickness, electrolyte uptake, compression state, and electrolyte compatibility requirements vary across battery chemistries. Selection should therefore be confirmed against electrode dimensions, assembly pressure, electrolyte system, and target test conditions.
Key Features
Designed primarily for laboratory research and routine battery assembly, with clearly defined specifications, easy-to-handle sheet formats, and flexible thickness options.
Porous Glass-Fiber Structure
The fibrous network forms a continuous porous structure suitable for use as an electrolyte-absorbing separator material.
Multiple Thickness Options
Standard thicknesses range from 0.5 mm to 2.0 mm to accommodate different assembly spaces.
Round & Sheet Formats
Available in common formats including Φ18 mm, 100 × 88 mm, and 100 × 100 mm.
Suitable for Research Batches
Most specifications are available in packs of 50 or 100 pieces for repeated experiments and sample screening.
Standard Size Selection
Specifications are organized by size × thickness × pack quantity. Determine the required active-area coverage first, then select the appropriate thickness.
Round Disc
Thickness 0.5–1.0 mm; 100 pcs per pack.
Rectangular Sheet
Thickness 0.6 mm; available in 50 / 100 pcs packs.
Square Sheet
Available in 0.5 / 1.0 / 1.2 / 1.5 / 2.0 mm thicknesses.
Reference Technical Parameters
The following parameters are organized from the supplied specification table and are intended to describe common technical evaluation items for ultrafine AGM glass-fiber separators.
| No. | Test Item | Motive-Power Battery Separator | Float-Service Battery Separator |
|---|---|---|---|
| 1 | Tensile Strength | Total thickness ≤2.00 mm: ≥0.42d kN/m Total thickness >2.00 mm: ≥0.84 kN/m | Total thickness ≤2.00 mm: ≥0.42d kN/m Total thickness >2.00 mm: ≥0.84 kN/m |
| 2 | Electrical Resistance / (Ω·dm²) | ≤0.00050d | |
| 3 | Maximum Pore Size / μm | ≤18 | ≤22 |
| 4 | Basis Weight / (g/m²·mm) | 155.0 ± 7 | 160.0 ± 7 |
| 5 | Elongation at Break / % | ≥2 | ≥2 |
| 6 | Wet Pressure Retention / % | ≥75 | ≥75 |
| 7 | Capillary Acid Wicking Height | ≥75 mm / 5 min ≥620 mm / 24 h | ≥80 mm / 5 min ≥720 mm / 24 h |
| 8 | Mass Loss After Acid Immersion / % | ≤3.0 | ≤3.0 |
| 9 | Acid Absorption Under Pressure / % | ≥550 | ≥550 |
| 10 | Loss on Ignition / % | ≤1 | ≤1 |
| 11 | Permanganate-Reducing Substances / (mL/g) | ≤5.0 | ≤5.0 |
| 12 | Iron Content / % | ≤0.0050 | ≤0.0050 |
| 13 | Chloride Content / % | ≤0.0030 | ≤0.0030 |
| 14 | Moisture Content / % | ≤1.0 | ≤1.0 |
| 15 | Appearance | No cracks or perforations; defects ≤5 | No cracks or perforations; defects ≤5 |
Standard Sizes & Pricing
For clarity, the 100 × 100 mm options are organized by thickness, with pricing shown for 50-piece and 100-piece packs.
| Size | Thickness | 50 pcs | 100 pcs |
|---|---|---|---|
| Φ18 mm | 0.5–1.0 mm | — | $26 |
| 100 × 88 mm | 0.6 mm | $26 | $42 |
| 100 × 100 mm | 0.5 mm | $22 | $38 |
| 1.0 mm | $42 | $75 | |
| 1.2 mm | $44 | $82 | |
| 1.5 mm | $59 | $109 | |
| 2.0 mm | $71 | $128 |
Typical Applications & Research Scenarios
Actual suitability of an AGM separator should be confirmed together with the battery chemistry, electrolyte type, assembly pressure, and operating conditions.
Battery Materials Research
For battery assembly, electrode-material screening, and small laboratory-cell research requiring a fibrous electrolyte-absorbing separator.
Separator Thickness Screening
Use the 0.5–2.0 mm thickness range to compare assembly space, electrolyte retention, and cell-structure requirements.
Prototype & Structural Validation
Round and sheet formats are suitable for rapid cutting, stacking, structural adjustment, and repeated small-batch assembly during experimental development.
Four-Step Selection Guide
Determine Electrode Size
The separator should generally cover the active electrode area, with sufficient edge allowance based on the actual assembly structure.
Select the Required Thickness
Select thickness according to cell-cavity space, compression state, and the required electrolyte-holding volume.
Confirm Electrolyte Compatibility
For different electrolyte chemistries and concentrations, small-sample validation is recommended before formal testing.
Determine Test Quantity
Choose a smaller pack for exploratory work; 100-piece packs are suitable for multiple parallel tests or longer research programs.
Handling & Storage Recommendations
Handling Recommendations
- Confirm that the separator size, thickness, and electrolyte system are compatible before use.
- Use clean cutting tools to reduce fiber contamination and edge damage.
- Avoid excessive stretching, folding, or localized sharp compression during assembly.
- For compression-sensitive experiments, keep assembly pressure and initial separator thickness consistent.
Storage Recommendations
- Keep the packaging clean and avoid prolonged exposure to high humidity or contaminated environments.
- Avoid direct contact with oils, dust, or other contaminants that may affect electrochemical experiments.
- Reseal unused separators after opening.
- For experiments with strict impurity-control requirements, pretreat the separator according to the applicable experimental procedure before use.
