Solid-state batteries are regarded as the next-generation solution for energy storage and electric vehicles. Compared with traditional lithium batteries, they feature better safety and greater potential for longer driving range. The anode current collector is the metal foil inside a solid-state battery that conducts electric current. Its surface quality directly affects the service life and stability of solid-state batteries.
Roll-to-roll (R2R) integrated vacuum coating equipment combining magnetron sputtering and evaporation is specially designed for surface coating on this type of anode current collector. Metal foil rolls are fed continuously into the machine, and double-sided coating can be finished in a vacuum environment in one pass, instead of processing single pieces separately.
Key Advantages of the Equipment
1. Uniform and stable coating layer
Coating is completed under vacuum. The thin and dense film sticks firmly to the metal foil surface and is not easy to peel off. It improves the contact between the current collector and solid electrolyte, lowers internal resistance of the battery and slows down performance degradation during long-term cycles.
2. Double-sided processing with high mass-production efficiency
It supports continuous roll feeding and completes coating on both sides in one run. Suitable for large-scale manufacturing. Compared with batch single-piece coating, it runs faster and cuts labor costs.
3. Flexible and adjustable process
Combining magnetron sputtering and evaporation coating technologies, it can adjust coating material and thickness according to customer requirements. It fits R&D, pilot test and mass production stages of solid-state batteries.
4. Improved battery safety and lifespan
Coated current collectors have stronger corrosion resistance. It reduces corrosion risks when solid-state batteries work at high temperatures, lowers short-circuit hazards and extends battery cycle life.
Industry Applications
This equipment is used for surface modification coating of solid-state battery anode current collector foils. The finished coated foil can be applied in R&D and manufacturing of solid-state power batteries and solid-state energy storage batteries. It works well from lab sample preparation to production line pilot scaling, serving as core production gear for new anode material development by solid-state battery material manufacturers.
Industry Development Trend
The global industrialization of solid-state batteries is accelerating, and demand for high-performance anode current collectors keeps rising. Plain metal foils used as traditional current collectors tend to have interface corrosion and stability issues in solid-state systems. Surface modification via R2R vacuum coating has become one of the mainstream technical routes in the sector.
As solid-state batteries gradually move into mass production in the future, roll-to-roll vacuum coating equipment capable of continuous double-sided coating with stable processes will see growing market demand. It will become indispensable core production equipment in the solid-state battery supply chain.
