Amprius Technologies

Amprius Technologies, founded in 2008 and based in Fremont, California, manufactures high-energy lithium-ion batteries using proprietary silicon nanowire anode technology. The company's batteries achieve energy densities up to 500 Wh/kg and 1,300 Wh/L, representing approximately double the energy density of conventional lithium-ion cells with graphite anodes. This performance profile enables significant reductions in battery weight and volume for the same energy output.

The silicon nanowire anode design allows for greater lithium-ion storage capacity compared to traditional graphite-based anodes, producing battery cells that store more energy in smaller and lighter packages. Amprius holds multiple patents covering its silicon nanowire fabrication process and battery cell architecture. The company operates production facilities in Fremont and pursues manufacturing expansion in Brighton, Colorado to increase output capacity for commercial customers.

Amprius serves customers in aviation, defense, electric vehicles and wearable electronics where weight and space constraints are critical design factors. The company's technology addresses the performance gap between conventional lithium-ion batteries and the energy density requirements of next-generation mobility and aerospace applications.