How Amprius Is Advancing Energy Density for Electric Aircraft Batteries

May 5, 2025

Amprius has launched its new SiCore™ 450 Wh/kg high-energy-density battery cell and is preparing for mass production. (Image: Amprius)

Amprius Technology recently launched its 450 Wh/kg SiCore™ Li-ion battery, the most energy-dense battery it has ever developed for electric aircraft and other mobility applications. In recent years, the California-based Li-ion battery maker has made several advancements in battery energy density with its silicon anode material system and is now preparing for mass production of SiCore.

The commercial launch of the 450 Wh/kg SiCore™ cell follows the broader introduction of Amprius' SiCore™ platform in January 2024. That announcement marked the debut of a new generation of silicon anode cells engineered for both high energy and high power in a single format. Their Li-ion batteries have already demonstrated the ability to extend the range and flight times of drones and high-altitude platform stations (HAPS). The company is now focused on mass producing their Li-ion battery to support more aviation and defense applications.

Amprius chief technology officer (CTO) Dr. Ionel Ștefan is the guest on this episode of the Aerospace & Defense Technology podcast to explain their latest battery energy density breakthrough and how they're preparing for mass production of their batteries.

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