While advances in battery technology are critical for next-gen products across multiple markets, the requirements of military applications take on a different meaning in terms of safety. A new lithium-sulfur-based battery, which offers energy density greater than 300 Wh/kg, has an enhanced safety chemistry that can prevent fire yet retain functionality, even after accidents. Developed by OXIS Energy, the technology has a long lifecycle of 2000 cycles before capacity reduces to 80% of its beginning of life (BoL).
OXIS’ lithium-sulfur batteries have a potential performance five times greater than Li-ion batteries. The cells also have a 100% available depth-of-discharge, superseding previous 80% discharge ranges that left the door open to damage caused by over-discharge. The batteries’ two main features—a ceramic lithium sulfide passivation layer and a non-flammable electrolyte—help it withstand extreme abuse scenarios, another key factor for military applications.
Watch "Lithium-Sulfur Battery Withstands Extreme Abuse," courtesy of Engineering TV:
The extremely lightweight battery suits it for soldiers and electric vehicles (OXIS is already in the planning stages to reduce its weight by a further 50%). It could also be used for automotive, solar energy storage, marine transportation, and advanced nanotechnology-enabled applications. OXIS recently received a Frost & Sullivan Award for Technology Innovation for the lithium-sulfur battery.