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PolyPlus Battery Company

  • Anode Material, Cross-cutting-function, Research Institution, Separator Material
  • Battery R&D, Lithium-Metal Anode, Lithium-Sulfur Battery, Solid-State Battery

PolyPlus Battery Company, based in Berkeley since 1991, specializes in high-energy-density lithium-based batteries. Utilizing proprietary technologies like Glass Protected Li Metal Batteries and PLE™, they provide efficient solutions for automotive, medical, drones, and underwater applications. Backed by significant investments, PolyPlus drives next-generation energy storage.

Company Location

Country:

United States

City:

Berkeley, California

Contact details

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Company Overview

PolyPlus Battery Company, founded in 1991 and headquartered in Berkeley, California, develops advanced lithium-based battery systems aimed at next-generation energy storage across consumer electronics, electric vehicles, medical devices, drones, and underwater applications.

Battery Technology

Proprietary technologies include the Glass Protected Li Metal Battery with solid-state lithium anode laminate and ultra-thin conductive glass separator, Protected Lithium Electrode (PLE™) enabling safe lithium metal anodes, Lithium-Seawater Batteries (Li-SWB) achieving up to 2000 Wh/kg, Lithium-Sulfur batteries at 400–600 Wh/kg, and Lithium-Air batteries exceeding 800 Wh/kg, all supported by scalable, cost-effective manufacturing processes.

Products

Glass Protected Li Metal Battery doubling energy density of conventional batteries; Protected Lithium Electrode (PLE™) for safe lithium metal anodes; Lithium-Seawater Batteries using seawater cathodes; Lithium-Sulfur batteries (400–600 Wh/kg); Lithium-Air batteries (>800 Wh/kg).

Recent Projects

In 2023, completed a $10 million Series A round to expand pilot manufacturing of Glass Protected Li Metal Batteries; collaborating with industry partners to test Lithium-Seawater Batteries in autonomous underwater vehicles and deep ocean sensors.

Investors

In 2019, PolyPlus Battery Company secured a $7.5M convertible note financing from Schlumberger and Belzberg & Co. In 2023, it raised $10M in a Series A round led by Tao Capital Partners with participation from AMETEK, Applied Materials, and LG Chem.
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