Amprius’ silicon nanowire Li-ion batteries energy Airbus Zephyr S HAPS photo voltaic plane

Amprius, Inc., a producer and developer of excessive vitality and excessive capability lithium-ion batteries, introduced that the corporate is supplying superior lithium-ion cells to the Airbus Defence and Area Zephyr Program. Utilizing Amprius’ cells, which include a 100% silicon anode, the Zephyr S flew greater than 25 days, setting a brand new endurance and altitude document for stratospheric flight.

The Zephyr platform is a brand new class of unmanned air automobile that operates as a high-altitude pseudo-satellite (HAPS) enabling inexpensive, persistent, native satellite-like providers. Combining solar energy and lithium ion batteries, the Zephyr plane holds world data for endurance in addition to altitude, flying at 70,000 toes or larger.

This stratospheric platform can fly for months at a time and combines the persistence of a satellite tv for pc with the pliability of an unmanned aerial automobile (UAV). The platform is predicted for use in a variety of rising purposes, together with maritime surveillance and providers, border patrol missions, communications, forest hearth detection and navigation.

Our collaboration with Amprius within the software of their silicon nanowire primarily based lithium ion cells to the Zephyr has been necessary to the success of the HAPS program. The excessive particular vitality of Amprius batteries allow the Zephyr to fly uninterrupted within the stratosphere which might not be potential with decrease efficiency batteries. This may additional lengthen the potential and utility of the Zephyr platform for our clients.

—Sophie Thomas, Airbus HAPS Program Director

Primarily based on its proprietary silicon nanowire know-how, Amprius has demonstrated breakthrough efficiency in vitality density and cycle life. Silicon anodes have a lot larger particular capability in comparison with graphite anodes that are utilized in standard lithium ion batteries. Nonetheless, in particle or movie constructions silicon shouldn't be steady and lasts just a few recharge cycles. Amprius’ silicon nanowire constructions overcome this instability and thereby allow lots of of cycles with particular energies of over 435 Wh/kg and vitality densities in extra of 1200 Wh/liter.

The silicon nanowire construction features a metallically conductive nanowire core, metallurgically linked to the present collector. This connection is important in creating and sustaining a steady electrical connection and mechanical construction on the electrode stage, in accordance with an Amprius presentation on the Energy Sources Convention earlier this 12 months. Every silicon wire is instantly linked and doesn't must depend on particle-to-particle contacts for conductivity; the silicon materials stays in electrical contact over all the cycle lifetime of the cell.

The quick lack of electrical connectivity and modifications in mechanical construction that plague nearly all of different silicon applied sciences are just about non-existent within the rooted silicon nanowire anodes. Furthermore, this vital stability is achieved in a construction that's just about 100% silicon, with none binder or conductive additive to dilute its energetic materials content material.

—Constantin Ionel Stefan, Amprius

The nanowire materials construction additionally permits a comparatively excessive 94% first coulombic effectivity in half cells and 90% coulombic effectivity in full cells with LCO cathode.


With the identical cathode and separator elements, the silicon nanowire anode know-how considerably will increase vitality density and particular vitality (strong circles are demonstrated merchandise). Supply: Amprius.

Amprius maintains an R&D lab and company headquarters in Sunnyvale, California; an R&D lab and state-of-the-art pilot manufacturing line in Nanjing, China; and a producing facility in Wuxi, China. Amprius is financed by main enterprise capital and personal fairness buyers together with Trident Capital, VantagePoint Capital Companions, Google Government Chairman Eric Schmidt, IPV Capital, Kleiner Perkins Caufield & Byers, SAIF Companions, Chinergy Capital, Wuxi IDG and DADI Capital.