Spray coating
Discrete PVDF points leave additional electrolyte infiltration paths.
Pole plate
PVDF
Separator
PVDF COATING
PVDF Coated Separator
A functional coated separator for electrode adhesion, electrolyte retention and high-voltage compatibility.
Coating chemistryWater-based PVDF
Application methodsSpray or roll coating
Reference base films9, 12 and 16 μmRepresentative classes from supplied technical material
Key advantages.
PVDF surface functionality supports stronger electrode interaction and electrolyte management in suitable cell designs.
Stronger electrode adhesion
Improved electrolyte retention
High-voltage compatibility
Application-led coating selection
SOURCE-DOCUMENTED PROFILE
Water-based PVDF: surface behavior and coating-method trade-offs.
The supplied literature distinguishes spray and roll coating by electrolyte access, electrode adhesion and separator air permeability, then reports three construction classes.
Technical content reproduced from the supplied water-based PVDF separator literature, pages 9–10.01
Good adhesion between separator and electrode
02
Better electrolyte infiltration and increased liquid retention
03
High decomposition voltage and applicability to high-voltage material systems
MICROSCOPY / SURFACE DETAIL
Published PVDF surface examples
The source page presents these two microscopy examples without assigning a process label to each panel. They are therefore described only by visible morphology here.
METHOD COMPARISON
Spray coating and roll coating
The source explains that gaps between sprayed PVDF points provide electrolyte infiltration channels, while roll-coated material permits infiltration through inter-particle gaps.
Roll coating
A more continuous PVDF layer emphasizes electrode adhesion.
Pole plate
PVDF
Separator
PHYSICAL PROPERTIES
Water-based PVDF / ceramic coated-separator matrix
The source identifies these as water-based PVDF / ceramic coated-separator constructions. The matrix compares spray and roll coating air permeability while keeping mechanical and thermal properties tied to each printed construction code.
Compare all 3 published configurations
| Test item | Dir. | 9 μm basePVDF9+3+1+1 | 12 μm basePVDF12+4+1+1 | 16 μm basePVDF16+2+1+1 |
|---|---|---|---|---|
| Thickness deviationμm | — | ±1 | ±1 | ±1 |
| Air permeabilitySpray coating · sec/100 cc | — | 200±40 | 240±40 | 240±40 |
| Air permeabilityRoll coating · sec/100 cc | — | 250±40 | 290±40 | 290±40 |
| Tensile strengthMPa | TD | >100 | >110 | >120 |
| Tensile strengthMPa | MD | >100 | >110 | >140 |
| Puncture strengthgf | — | >435 | >600 | >600 |
| Heat shrinkage105°C · % | TD | ≤1 | ≤1 | ≤1 |
| Heat shrinkage105°C · % | MD | ≤1 | ≤1 | ≤1 |
| Heat shrinkage120°C · % | TD | ≤2 | ≤2 | ≤2 |
| Heat shrinkage120°C · % | MD | ≤2 | ≤2 | ≤2 |
The combined PVDF / ceramic description and spray / roll coating terminology follow the supplied product literature.
Construction codes are preserved verbatim; no undocumented layer-stack interpretation is added.
QUALIFICATION CONTEXT
From literature value to qualified grade.
Published matrices support initial comparison. Final specifications remain tied to the selected grade, agreed test method and lot-specific quality documentation.
Application areas
- Electric vehicles
- Energy storage
- High-voltage cell platforms
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