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As the global new energy industry accelerates, lithium battery production is entering an era of exponential growth.
According to industry forecasts:
Between 2021 and 2030, global lithium battery production will increase more than fivefold, reaching 5,500 GWh.
Each 1 GWh of capacity requires around 14 million m² of current collector material.
By 2030, the total demand for current collectors is expected to reach approximately 77 billion m².
With this surge in demand, traditional copper and aluminum foils are increasingly constrained by weight, cost, and safety limitations.
In contrast, composite current collectors—lightweight, conductive, safe, and cost-effective—have emerged as a transformative material direction in the next generation of lithium battery technologies.
Composite current collectors represent more than just a performance upgrade — they are a key enabler of green manufacturing.
Industry estimates show that when composite aluminum foil production reaches 5 billion m², it can save approximately 140,000 tons of copper resources and reduce 2.3 million tons of CO₂-equivalent emissions.
In the context of global carbon neutrality goals, composite current collectors are expected to deliver significant zero-carbon benefits across the lithium battery value chain.
Leveraging its advanced PVD vacuum coating systems, HCVAC empowers customers to achieve both mass production and a more sustainable, low-carbon manufacturing process.
Composite current collectors demonstrate exceptional compatibility across multiple battery systems, including:
This indicates that composite current collectors are poised to become a next-generation universal platform material for electrochemical energy storage.
According to industry forecasts, China’s shipment volume of composite current collectors is expected to increase more than 300-fold between 2025 and 2030, giving rise to a rapidly emerging multi-billion-dollar industry.
For years, lithium-ion batteries have relied on copper and aluminum foils as current collectors. However, their limitations are becoming increasingly evident:
Pain Point Type | Description |
Weight | Copper foil accounts for approximately 13% of the total battery weight, and aluminum foil about 5%, limiting further improvements in energy density. |
Cost | The high price volatility of copper leads to material costs representing around 9% of the total battery cost. |
Safety | Copper foils are prone to lithium dendrite penetration through the separator, posing potential thermal runaway risks. |
These challenges have become the “hidden costs” of industrial upgrading, driving the rapid adoption of composite current collectors as the new mainstream solution.
Using polymer-based films such as PET and PP as substrates, and applying PVD metallization, composite current collectors demonstrate several notable performance advantages:
To form a highly conductive and strongly adherent metal layer on a non-metallic substrate, the PVD (Physical Vapor Deposition) coating technology is essential for composite current collectors.
Based on years of experience in vacuum equipment, HCVAC has developed a high-precision magnetron sputtering system optimized for roll-to-roll continuous production, offering the following advantages:
Magnetron Sputtering
Evaporation Coating
As a key direction for composite current collectors, the PVD process for composite copper foil is evolving toward high conductivity, high uniformity, low stress, and low carbonization.
A typical process route includes:
Substrate Surface Pretreatment → Vacuum Coating (Cu/Cr/Ni Multilayer Structure) → Online Thickness Monitoring → Roll-to-Roll Winding
HCVAC’s solution enables:
HCVAC has over a decade of experience in magnetron sputtering and vacuum coating technologies, continuously building domestically manufactured equipment systems for the lithium battery, optical, and electronics industries.
To meet the mass production requirements of composite current collectors, HCVAC offers:
As the industry moves toward chiple...
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