Double Sided Polished Copper Foil

 

Double Sided Polished Copper Foil is characterized by a symmetrical structure of two sides, metal density close to the theoretical density of copper, very low profile of the surface, excellent elongation and tensile strength, and so forth. As the cathode collector for lithium batteries, it has excellent cold/thermal resistance and can significantly extend the battery longevity. Double Sided Polished Copper Foil can be widely applied in batteries for new-energy vehicles, the 3C industry represented by smart phones, notebook computers, and the ESS storage system, and space.

 

 

 

 

Type

High Resistance Copper Foil

copper thickness

4µm

4.5µm

5µm

6µm

7µm

8µm

9µm

12µm

15µm

18µm

20µm

Mass per unit g/m²

35-38

39-42

43-46

50-55

60-65

70-75

85-90

100-105

128-133

155-160

175-180

tensile strength(kg/mm²)

≥50.0

≥50.0

≥50.0

≥50.0

≥50.0

≥50.0

≥50.0

≥50.0

≥50.0

≥50.0

≥50.0

Elongation rate(%)

≥2.0

≥2.0

≥2.5

≥3.0

≥3.0

≥4.0

≥4.0

≥5.0

≥6.0

≥8.0

≥8.0

Mechanical thickness(µm)

0,+1

0,+2

0, +3

Surface roughness

Smooth surface

Rz≤3.0 ( perhaps Ra≤0.3)

(µm)

matte side

Rz≤3.0

Wettability

≥36dyne

oxidize resistance

140±2℃ /15min No visible discoloration or oxidation after baking

chemical composition(%): Cu≥ 99.8% (Cu+Ag)

Wide tolerance(MM) ：± 1MM

 

 

Electrolytic Copper Foil Produced via electrodeposition from a copper sulfate solution onto a rotating titanium or stainless steel drum.The deposited copper is peeled off, then treated (roughening, heat resistance, anti-corrosion).

Rolled Copper Foil Made by cold-rolling high-purity copper cathodes into thin sheets, followed by annealing.Surface can be further treated (e.g., oxidation resistance coating).

 

PRODUCTION PROCESS FLOW CHART

 

-Good wettability, low roughness.

-Good wettability, low roughness.

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It features excellent physical properties such as fine grain structure, low profile, and high elongation. In the PCB manufacturing process, it offers the advantages of short circuit etching time and highly uniform circuit etching.



It can effectively contribute to improving the energy density of lithium batteries, provides a stable, conductive substrate onto which the anode active material slurry is coated and rolled.aligning with a major trend in the development of future power battery systems for electric vehicles-lightweighting.



With advantages including light weight, high flexibility, improved electrolyte wetting efficiency, and reduced internal resistance of lithium batteries, it significantly enhances the specific energy and charge-discharge rate of lithium-ion batteries.Copper is electrochemically stable within the operating voltage window of the anode, meaning it does not alloy with lithium.



It exhibits good thermal conductivity, excellent processability, ductility, and formability, along with remarkable resistance to softening and high fatigue strength.Collects and transports electrons generated during the battery's discharge phase to the external circuit. Conversely, it distributes electrons evenly during charging

 

 

 

 

 

 

Double Sided Polished Copper Foil can be well used on Automotive power batteries, high-end digital batteries etc.

 

 

Q1: What info. should I let you know if i would like to get a quotation for the the Electrolytic copper foil?

A1: The material size (Thickness*Width*Length and total Qty). If possible, it would be more better to advise the application of the product

Then we can recommend the most suitable products with details for confirmation.

 

Q2:How long is your delivery time?

A2:Generally it is 5-10 days base on we have stock on hand. or 15-20 days if no inventory, then need check with our production team for lead time according to the quantity.

 

Q3: Do you provide samples ?

A3:Yes, if standard sizes sample is free but buyer need to pay freight cost.

 

Q4:What is your terms of payment ?

A4: Normal payment term is 30%TT, 70% before shipment get ready to ship

 

Q5: How do you guarantee the quality of the products?

A5: Each step of production and finished products will be carried out inspection by QC department before storing to the warehouse. NG products are not allowed in the completed goods warehouse.

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