Hydrophobic Graphite Double-Side Coated Copper Foil Description

Hydrophobic Graphite Double-Side Coated Copper Foil is a specialized material engineered for high-performance energy storage and electronic applications. It features a high-purity copper core coated with graphite layers on both sides, each formulated with hydrophobic agents to repel moisture and prevent oxidation. This dual-sided coating design ensures uniform electrical contact, improved interface stability, and enhanced environmental durability.

The graphite layers offer excellent electrical conductivity, promoting efficient charge transport in electrochemical cells, while the hydrophobic surface reduces moisture absorption and corrosion risk, key factors in extending the service life and safety of lithium-ion batteries, supercapacitors, and other sensitive devices. The symmetrical coating also helps balance electrochemical reactions and improves adhesion with electrode materials, contributing to more uniform current distribution and thermal performance.

Manufactured using advanced coating technologies such as roll-to-roll or slot-die processes, the coatings are precisely applied and cured to achieve strong adhesion, consistent thickness, and smooth surface texture. The result is a flexible, robust material that meets the stringent demands of modern battery and electronic manufacturing.

Applications include next-generation energy storage systems, high-capacity batteries, flexible electronics, fuel cells, and electronic packaging, where moisture protection, conductivity, and interface reliability are essential to performance and longevity.

Hydrophobic Graphite Double-Side Coated Copper Foil Applications

1. Lithium-ion Batteries: Used as an anode current collector to improve charge distribution, reduce moisture-related degradation, and extend cycle life.

2. Supercapacitors: Enhances energy density and conductivity while offering stable performance under humid conditions.

3. Fuel Cells: Provides a corrosion-resistant, conductive layer for efficient electrochemical reactions.

4. Flexible and Wearable Electronics: Offers durability, flexibility, and environmental protection in bendable devices.

5. Solid-State Batteries: Ensures stable interface contact and reduced electrolyte decomposition due to its hydrophobic surface.

6. Advanced Electronic Packaging: Improves thermal and electrical performance while preventing moisture-induced failure in high-reliability components.

7. Energy Storage Systems (ESS): Supports large-scale, long-life storage applications by maintaining stability and efficiency in challenging environments.

Hydrophobic Graphite Double-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 Double-Side Coated Copper Foil FAQs

Q1. Why is the coating hydrophobic?

The hydrophobic property repels moisture, preventing oxidation and corrosion, especially in humid or corrosive environments.

Q2. Does double-side coating affect flexibility?

No, the foil remains flexible and suitable for use in bendable or wearable devices due to its thin and uniform graphite layers.

Q3. How does this foil improve battery performance?

It enhances charge transfer, reduces interface resistance, prevents moisture damage, and extends cycle life.

Related Information

1.       Common Preparation Methods

The preparation of Hydrophobic Graphite Double-Side Coated Copper Foil begins with high-purity copper foil, which is cleaned to remove surface contaminants such as oils, oxides, and dust. A specially formulated graphite slurry containing conductive graphite particles, binders, solvents, and hydrophobic agents is then coated on both sides of the copper using techniques such as roll-to-roll, slot-die, or doctor blade coating. Each side is coated sequentially or simultaneously, depending on the production system. The foil is passed through a drying oven to remove solvents and ensure even adhesion of the graphite layers. Curing or heat treatment may be applied to further enhance the mechanical strength and bonding of the coatings. Optional calendaring is sometimes applied to adjust surface smoothness and thickness uniformity. The finished material is then tested for coating thickness, surface resistance, hydrophobicity, adhesion strength, and flexibility. Once it meets performance standards, the foil is rolled or cut to the required dimensions and packaged for use in battery, capacitor, or electronics manufacturing. This process ensures consistent quality and reliable double-sided conductivity and moisture resistance.