FutureFlight
Amprius Raises Energy Density Stakes with 450 Wh/kg Battery
The first examples of the cells have just been shipped to the manufacturer of pseudo satellites, and Amprius says they could also be used to power larger eVTOL aircraft.
Amprius electric battery cells.
The latest electric batteries delivered by Amprius offer an energy density of 450 Wh/kg. (Image: Amprius Technologies)

Battery manufacturer Amprius Technologies has delivered the first examples of its latest 450-Wh/kg, 1150-Wh/L high-energy-density lithium-ion cells. Compared with commonly available 300-Wh/kg batteries, the new cells, which use the U.S. company’s Si-Nanowire anode technology, represent a further improvement on the 405-Wh/kg product unveiled as recently as last November.

The first of the cells went to a company that makes high-altitude pseudo satellites. Amprius COO Jon Bornstein said that the increased performance will support aerospace products with higher power needs, including new eVTOL aircraft, for which the batteries could extend flight endurance as power will not deplete so quickly during takeoff. He said that the company expects to produce the first 500-Wh/kg cells later this year.

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