Amprius Technologies, Inc., a prominent developer of next-generation lithium-ion batteries utilizing its Silicon Anode Platform, announced the introduction of its SiCore™ 450 Wh/kg lithium-ion battery on April 24, 2025. This latest SiCore cell represents the company’s highest energy density offering, delivering 450 Wh/kg and 950 Wh/L, and is slated for mass production in the near future through Amprius’ global manufacturing partners.
The SiCore™ 450 Wh/kg battery distinguishes itself with its superior energy density, providing up to 80% more energy compared to traditional lithium-ion cells with graphite anodes. This improvement enables extended flight times, increased range, and enhanced system performance while maintaining a compact and lightweight design. These attributes make the SiCore™ cell particularly suitable for applications in aviation and electric mobility platforms.
“We’ve demonstrated what’s possible at 450 Wh/kg with our SiMaxx platform years ago,” said Dr. Kang Sun, CEO of Amprius Technologies. “What makes this SiCore cell different and noteworthy is that it brings that level of extreme performance into a cell chemistry and format that are ready to scale with the existing lithium-ion battery manufacturing processes and equipment in the industry. It’s production-ready, commercially available, and already being qualified by customers today.”
Designed to perform reliably under extreme conditions, the SiCore™ cell meets the stringent requirements of aviation and defense applications. It is capable of operating across wide temperature ranges and mission-critical environments, supporting technologies such as High-Altitude Platform Stations (HAPS), Medium-Altitude Platform Stations (MAPS), and unmanned aerial vehicles (UAVs). The enhanced energy density allows for longer missions and greater payload capacities without adding weight, thereby reducing overall system costs and the need for additional batteries, fuel, or equipment.
Amprius is currently evaluating the SiCore™ cell with leading aviation and defense customers, with plans to move into the qualification phase for commercial deployment. To support anticipated demand, the company has established a global contract manufacturing network with gigawatt-hour-scale production capacity, ensuring the ability to supply high-performance cells at competitive costs.
The SiCore™ 450 Wh/kg cell is expected to receive UN38.3 certification within the current quarter, which is necessary for the safe air transport of lithium-ion batteries. This certification will facilitate volume shipments and support the cell’s broader commercial deployment on a global scale.
The launch of the SiCore™ 450 Wh/kg cell follows the initial release of the SiCore platform in January 2024, which introduced a new generation of silicon anode cells designed for both high energy and high power applications. With the latest cell now entering production, the SiCore platform is well-positioned to meet the demanding needs of electric aviation, defense, and mobility markets.
Source: Amprius
