Battery separator film technology plays a critical role in the performance, safety, and scalability of lithium-ion batteries.
To provide deeper insights, we spoke with one of our experts Roger Bollström, who shares key perspectives on separator coating, production challenges, and scalable solutions. Below are some of the most important questions—and a glimpse of what you’ll discover in the full white paper.

Why are battery separator films critical for lithium-ion battery performance and safety?

Battery separator films are no longer just passive components—they are safety-critical elements that directly impact cycle life, thermal stability, and overall battery performance. Advanced coated separators help prevent short circuits and improve reliability under extreme conditions.

What are the main challenges in separator coating at industrial scale?

Producing ultra-thin separator films (down to a few microns) at high speeds requires precise web handling, advanced coating systems, and controlled drying processes. Even minor defects can lead to performance losses or safety risks.

How do ceramic coatings improve battery separator performance?

Ceramic-coated separators enhance thermal resistance, mechanical strength, and electrolyte wettability, making batteries safer and more efficient. These coatings are essential for modern EV and energy storage applications.

How can manufacturers scale separator coating for gigafactory production?

Scaling production requires high-throughput coating lines, inline quality control, and data-driven process optimization. Advanced technologies enable speeds up to hundreds of meters per minute while maintaining consistent quality.

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Talk to our expert Roger Bollström (Roger.Bollstroem@matw.com) and get tailored advice for your production challenges.