Leading the charge in lithium-sulfur batteries

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Chunks of bright yellow elemental sulfur, the key material in Zeta Energy's lithium-sulfur batteries

Why lithium-sulfur?

More energy. Less weight.
Built in America.

More energy.
Less weight.
Built in America.

Why lithium-sulfur?

Sulfur cathodes store far more charge per kilogram than nickel or iron-based cathodes. That means significantly longer flight times for drones, lighter portable power systems, and reduced weight in any application where every gram counts.

Higher energy density

Higher energy density enables significantly longer flight times for drones and lighter batteries for portable power, robotics, and aerospace.

Higher energy density

Higher energy density enables significantly longer flight times for drones and lighter batteries for portable power, robotics, and aerospace.

Abundant, domestic materials

Our cathodes use sulfur, polyacrylonitrile, and a carbon additive. These materials are widely available and far less dependent on constrained supply chains than nickel and cobalt. This supports lower material costs and greater manufacturing resilience in the United States.

Abundant, domestic materials

Unmatched process simplicity

Our cathode is made from only three input materials and requires just three process steps. This extreme simplicity lowers complexity, cost, and scale-up risk compared to conventional cathode manufacturing.

Unmatched process simplicity

The energy density bottleneck

Electric cars existed in the 1910s but never took off because batteries could not deliver enough energy for practical range and weight. Higher energy density solves that core problem. It improves the two metrics that matter most, range and mass, and enables simpler, lower-cost electric designs for drones, robots, and other mobile systems.