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.
