Overview

• HiSep‑II is a patented, super-thin coating applied to the separator that blocks lithium polysulfides while allowing lithium ions to pass.
• NTNU reports cycling gains from roughly 200 to about 1,000 charges in Gløshaugen laboratory cells using the coating.
• Researchers say an 800‑volt electric‑vehicle battery pack could be more than 200 kilograms lighter if Li‑S cells are enabled by the filter.
• The team describes the process as environmentally friendly, designed for scale, and compatible with existing lithium‑based manufacturing.
• The coating has not been used in cars, and NTNU’s Technology Transfer Office is recruiting license partners for independent testing, scale‑up, and potential applications in EVs, grid storage, aviation, drones, and maritime transport.