Sepion Technologies develops ultra-thin, drop-in polymer separator coatings and membrane technologies intended to replace legacy ceramic materials in lithium-ion batteries. Its coatings aim to enable higher energy density, faster charging, and improved durability without requiring changes to existing battery manufacturing lines. The company reports its products are currently being manufactured on commercial production lines to support customer qualification with leading global battery manufacturers. Sepion is supporting multiple concurrent qualification programs for electric vehicle, energy storage system, and consumer electronics applications. Led by CEO Peter Frischmann and based in Alameda, CA, the company plans to use recent funding to scale U.S.-based polymer production, expand product lines, and strengthen quality and operations.

Total raised

$44M

Funding rounds

3

Latest round

Series B

Latest activity

Apr 2026