Powernap Energy is a sodium battery company.

We envision a world with battery storage in every home and an electric vehicle for every driver. To achieve this promise, we engineer power- and energy-dense batteries from sodium.

TEAM

We are a group of entrepreneurs, scientists, and engineers.

Leadership

Giselle Cheung

CEO

  • 10+ years in equity research, aerospace sales and marketing
  • Experienced in building global sales networks and commercializing deeptech
  • A.B. economics; Harvard

Giselle Cheung

CEO
Ben Rupert

CTO

  • Ph.D. chemistry; Berkeley
  • 20+ years synthetic chemistry experience
  • 13 years in synthesis and scale up of battery materials
  • Led electrolyte development at solid state battery maker Blue Current

Ben Rupert

CTO

Advisors

Leanne Beer, PhD

Advisor

Marty Mulvihill, PhD

Advisor

Ulderico Ulissi, PhD

Advisor

Open Positions

Join us on our mission to accelerate electrification!

Battery Engineer

Part Time

Lab Tech

Full Time

Brief Timeline

2024
Discovery Phase

Powernap studies phosphorus’s potential in solid state sodium batteries with support from Breakthrough Energy’s Explorers program. CTO Benjamin Rupert tests our engineered phosphorus material with a liquid electrolyte and discovers: it works.

Optimization Phase

With continued support from Breakthrough Energy, Powernap continues to optimize its material and processes for performance and mass-manufacturability.

2025

Contact Us

hello@powernap.energy

1933 Davis Street, Suite 312
San Leandro, California 94577

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