Materials / grade-specific review
Battery-Grade Copper Foil
High-purity electrodeposited copper foil for anode current collection, with controlled surface roughness and thickness tolerance.
APPLICATION & GRADE
Grade / designation: SZ-M1-CC01
Grade and specification to be confirmed
Discuss Material Requirements ↗Typical applications
Anode current collector for lithium-ion cells
Silicon-based anode builds
Coin-cell electrode discs
Pouch and cylindrical pilot production
Grade & supply review
Thickness from 6 to 20 μm and slit width
Temper, roughness and wetting tension
Carbon coating weight per side
Roll, sheet or punched disc supply
Representative image. Actual material appearance varies by grade and lot — request a current photograph or sample.
About this material
Copper is used on the anode because it is stable against lithium at low potential and does not alloy with it at cell operating voltages — aluminium, the cathode choice, would dissolve into the electrolyte below about 1 V. Foil thickness has fallen steadily as cell design pushes energy density: 12 μm was standard, 8 μm is common, and 6 μm is used where coating and handling equipment can support it.
Surface topography matters as much as thickness. A controlled roughness profile gives the water-based anode slurry something to key into, which reduces delamination during cycling. For silicon-containing anodes the recommendation is usually a carbon-coated foil instead, because the large volume change of silicon puts far more mechanical stress on the interface.
Documentation, controls and care
Quality controls
- Thickness measured across the web
- Areal density tolerance verified
- Pinhole inspection
- Surface roughness reported per lot
Handling & storage
- Handle with gloves — fingerprints cause localised corrosion.
- Store in a dry place; copper tarnishes in humid air.
- Avoid sharp creases; creased foil causes coating defects and coating skips.
Grades on this page are references used to describe capability; they are not a fixed product list.
Specification values are typical windows compiled from public technical references and supplier
datasheets, and are provided for selection guidance only. The specification delivered against your
order is agreed in writing, and measured values are confirmed on the batch certificate of analysis.
Materials listed here may be hazardous; they must be handled by qualified personnel under applicable
regulations.
Material specifications
| Material | Electrodeposited copper foil |
|---|---|
| Thickness | 6 / 8 / 9 / 12 μm |
| Purity | ≥99.9% |
| Tensile strength | ≥300 MPa |
| Elongation | ≥3% |
| Surface | Single-side bright or double-side bright |
| Roughness (Ra) | 0.15–0.35 μm |
| Areal density tolerance | ±2% |
| Width | 50–500 mm, slit to order |
| Roll core | 3 inch / 6 inch |
| Anti-oxidation treatment | Passivated surface |
| Supply format | Roll, sheet or punched disc |
Grade & packaging options
Carbon-coated copper foil for Si anodes
Ultra-thin 4.5 μm on request
Aluminium foil for cathodes
Punched discs in φ12–16 mm
Supply boundaries
Reference grade, not a fixed catalogue item. Capacity, particle size, coating, purity and packaging are set to the specification your process needs — the delivered grade may differ from the values shown here.
Packaging & handling
Sample pack | 1 m / 5 m roll
Laboratory pack | 25 m roll, narrow slit
Production pack | 500–2000 m roll on core
Information for material review
Cell chemistry, format and voltage window
Target capacity, areal loading or formulation
Process route — NMP/PVDF, aqueous, or dry
Quantity per lot, packing and delivery schedule
Training in China
Training at our China facility is available for this product. Scope, schedule and language are agreed for each project.
Related products
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Discuss your material specification.
Share the intended use, required grade, quantity and supporting documents you need to review.
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