# Sepion Technologies

> Sepion Technologies develops nanoporous polymer coatings for battery separators. Founded by Berkeley Lab scientists Peter Frischmann and Brett Helms, it moved from lithium-sulfur research to lithium-metal cells and then to supplying separator materials that can fit existing lithium-ion manufacturing. Its Power and Shield lines target charging, energy density, durability and safety; as of March 2026, coated separators were on commercial production lines for customer qualification.

- **Founded:** 2015
- **Headquarters:** Alameda, United States
- **Founders:** Peter Frischmann (CEO and co-founder), Brett Helms (Chief Science Officer and co-founder)
- **Products:** Sepion Power, Sepion Shield, Polymer materials and coated separators, Sepion Frontier
- **Notable:** Founded in 2015 from Berkeley Lab membrane research after an NSF I-Corps customer discovery program., California Energy Commission project reported 378 qualified polymer ink formulations and 620 coating trials., Opened a 25,000-square-foot Alameda pilot facility in 2023; the company said this raised coating capacity 1,000-fold over its previous process.

## Products & services

- **Sepion Power** — Polymer separator coating aimed at faster charging, higher energy density and thinner battery systems; a March 2026 company release describes coating thickness below 200 nanometers.
- **Sepion Shield** — Durability-oriented separator coating aimed at safety, cycle life and long-term performance stability.
- **Polymer materials and coated separators** — Sepion supplies its proprietary polymer to separator manufacturing partners or polymer-coated separator material to cell makers, using roll-to-roll coating and customer qualification programs.
- **Sepion Frontier** — Joint development program exploring the polymer platform in water purification, resource recovery, industrial separations and other applications; these are exploratory rather than established battery products.

## Achievements

- Founded in 2015 from Berkeley Lab membrane research after an NSF I-Corps customer discovery program.
- California Energy Commission project reported 378 qualified polymer ink formulations and 620 coating trials.
- Opened a 25,000-square-foot Alameda pilot facility in 2023; the company said this raised coating capacity 1,000-fold over its previous process.
- Named Best Commercialization Venture at the 2025 NREL Industry Growth Forum.
- Company reports more than 20 patent families and commercial-line production for customer qualification as of 2026.

## Latest updates

- **2026-03** — Announced a $10 million Series B and said coated separators were on commercial lines for late-stage customer qualification.
- **2025-03** — Won Best Commercialization Venture at the NREL Industry Growth Forum.
- **2024-11** — Signed a development and sales memorandum with Shenzhen Senior Technology Material.
- **2024-10** — Announced a $17.5 million grant-backed plan for a West Sacramento manufacturing facility.

## Links

- Website: https://sepiontechnologies.com/
- LinkedIn: https://www.linkedin.com/company/sepion-technologies
- Twitter/X: https://twitter.com/SepionTech

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Profile page: https://yespress.io/sepion
Published by YesPress — https://yespress.io
Last updated: 2026-09-29