Advanced Membranes for Batteries and Water Treatment

“We separate the good from the bad.”

Our Vision

Sepion is an advanced materials company offering a platform of highly-tunable nanoporous membranes sold as key components to enable next-gen electric vehicle and portable electronics batteries, long-duration grid-storage batteries, and cost-effective water treatment.


How It Works

Sepion is commercializing a membrane platform with a suite of membrane products that has broad applicability to enhance the performance and economics of lithium batteries, flow batteries, hydrometallurgy, and heavy metal removal. At the heart of our platform technology is the ability to deliver robust, low-cost membranes with unmatched selective transport in formats that drop-in with existing manufacturing processes to minimize barriers to market entry. Our membranes function like nanoscale sieves, allowing only the smallest ions to pass at atomic level while blocking everything else to boost device performance.


Our Adventures


Q2 – Won NSF Bay-Area I-Corps People’s Choice Award

Q3 – Founded Sepion


Q1 – Awarded Phase I DOE-STTR 

Q2 – Accepted to Cyclotron Road 

Q3 – Awarded ARPA-E IONICS 

Q3 – Awarded DOE HPC4mfg 

Q4 – Won R&D 100 Award for Technology


Q1 – Partnered with first customer

Q2 – Awarded Phase II DOE-STTR 

Q2 – Won World Materials Forum Startup Challenge Coup de Coeur award

Q3 – Awarded CalSEED

Q4 – Delivered Li-ion samples to customers for in-house validation


Q2 – Signed JDA for grid-storage battery membrane product

Q3 – Awarded ARPA-E DAYS 

Q3 – Moved into new lab space in Emeryville, CA

Q4 – Won VERGE Transportation Pitch competition

Q4 – Won CleanTechOpen West


Q1 – Won CalSEED Prototype Award

Q2 – Won Production Scale-up for Clean Energy Technologies Award



CEO & Co-founder

CSO & Co-founder

HR Business Partner & Office Manager

Engineering Manager

Staff Scientist

Staff Scientist

Staff Engineer

Coating Engineer/Project Manager

Research Associate



Get in Touch

Send us a message for more information (

Emeryville, CA 94608, USA



Sepion is deeply appreciative of the following organizations for their support.


©2020 by Sepion Technologies, Inc.