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Hydrophobic Graphite Single-Side Coated Copper Foil Description

Hydrophobic Graphite Single-Side Coated Copper Foil is an advanced functional material designed for high-performance energy storage and electronic applications. It consists of a high-purity copper foil substrate with a uniform layer of graphite coated on one side. The graphite layer is specially treated to be hydrophobic, meaning it repels moisture, which significantly improves the material's resistance to oxidation and environmental degradation.

This hydrophobic property enhances the foil’s stability in humid or corrosive environments, ensuring long-term reliability and performance. The graphite coating provides excellent electrical conductivity and a smooth surface, making it ideal as a current collector in lithium-ion batteries, supercapacitors, and other electrochemical devices. The single-sided design allows for controlled interface behavior, enabling precise layering in cell assembly processes.

The copper base ensures high thermal and electrical conductivity, while the graphite coating supports uniform charge distribution and strong adhesion with active materials. The combination of these features results in improved energy efficiency, cycle life, and safety of the final device.

Hydrophobic Graphite Single-Side Coated Copper Foil is widely used in energy storage systems, flexible electronics, and high-reliability electronic components, where moisture control, conductivity, and surface stability are critical to performance.

Hydrophobic Graphite Single-Side Coated Copper Foil Applications

1. Lithium-ion Batteries: Used as a current collector for the anode, offering enhanced moisture resistance and stable conductivity.

2. Supercapacitors: Improves charge distribution and cycle life with its hydrophobic, conductive surface.

3. Flexible Electronics: Provides reliable electrical performance and environmental stability in bendable or wearable devices.

4. Fuel Cells: Acts as a corrosion-resistant, conductive layer in gas diffusion or collector plates.

5. Electronic Packaging: Enhances thermal and electrical performance while protecting against humidity-induced degradation.

6. Energy Storage Modules: Used in advanced battery assemblies where high performance and moisture control are essential.

Hydrophobic Graphite Single-Side Coated Copper Foil Packaging

Our products are packaged in customized cartons of various sizes based on the material dimensions. Small items are securely packed in PP boxes, while larger items are placed in custom wooden crates. We ensure strict adherence to packaging customization and the use of appropriate cushioning materials to provide optimal protection during transportation.

Packaging: Carton, Wooden Box, or Customized.

Kindly review the packaging details provided for your reference.

Manufacturing Process

1.       Testing Method

(1)    Chemical Composition Analysis - Verified using techniques such as GDMS or XRF to ensure compliance with purity requirements.

(2)    Mechanical Properties Testing - Includes tensile strength, yield strength, and elongation tests to assess material performance.

(3)    Dimensional Inspection - Measures thickness, width, and length to ensure adherence to specified tolerances.

(4)    Surface Quality Inspection - Checks for defects such as scratches, cracks, or inclusions through visual and ultrasonic examination.

(5)    Hardness Testing - Determines material hardness to confirm uniformity and mechanical reliability.

Please refer to the SAM testing procedures for detailed information.

Hydrophobic Graphite Single-Side Coated Copper Foil FAQs

Q1. Why is the coating only on one side?

Single-side coating allows for controlled interface behavior in electrochemical cells and ensures optimal bonding with active materials while keeping the other side conductive for integration.

Q2. Does the graphite layer affect conductivity?

No, the graphite layer enhances surface conductivity while maintaining excellent electrical performance thanks to strong adhesion and uniform coating.

Q3. Is the foil flexible for use in wearable or bendable devices?

Yes, the copper base and thin graphite layer provide good flexibility, making it suitable for flexible electronics and wearable technology.

Related Information

1.       Common Preparation Methods

The preparation of Hydrophobic Graphite Single-Side Coated Copper Foil involves several controlled steps to ensure uniformity, adhesion, and hydrophobic performance. First, high-purity copper foil is selected and thoroughly cleaned to remove surface oils, oxides, and other contaminants. A specially formulated graphite slurry is then applied to one side of the copper foil using techniques such as slot-die coating, roll-to-roll coating, or doctor blade application. The slurry contains graphite particles, binders, solvents, and hydrophobic agents that impart moisture-repellent properties to the final coating.

After the coating is applied, the foil passes through a drying and curing process under controlled temperature and humidity conditions to evaporate solvents and strengthen the bond between the graphite layer and the copper substrate. In some cases, additional surface treatments such as calendaring or heat pressing are used to enhance coating density, smoothness, and electrical performance. The finished material is then trimmed, tested for uniformity, conductivity, hydrophobicity, and adhesion, and finally rolled or cut to size for use in battery or electronic applications. This process ensures the final product meets the stringent requirements for electrochemical and environmental performance.