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Start-ups

Sepion raises funds for better batteries

by Matt Blois
November 26, 2021 | A version of this story appeared in Volume 99, Issue 43
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The California start-up Sepion Technologies has raised $16 million from investors including Solvay to commercialize electric vehicle batteries with lithium-metal anodes and liquid electrolytes. Sepion uses a polymer membrane to prevent dendrites, structures that can grow on the anode during charging and cause the battery to fail. The company plans to scale up polymer synthesis, battery cell fabrication, and testing capabilities. Sepion was founded in 2015 by chemists from Lawrence Berkeley National Laboratory.

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