Bye Aerospace is looking at OXIS Energy Ltd.’s lithium-sulfur (Li-S) battery cell technology to power its future aircraft and air-taxi or “urban air mobility” (UAM) designs. The companies are launching the initial phase of an advanced, high-voltage, lightweight Li-S battery pack development program for aerospace applications.

In contrast with conventional lithium-ion cells, sulfur is a natural cathode partner for metallic lithium and the chemical processes include dissolution from the anode surface during discharge and reverse lithium plating to the anode while charging. What this means is, Li-S provides a theoretical specific energy in excess of 2700 watt hours per kilogram – a specific energy nearly 5 times higher than that of Li-ion.

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William Kucinski is content editor at SAE International, Aerospace Products Group in Warrendale, Pa. Previously, he worked as a writer at the NASA Safety Center in Cleveland, Ohio and was responsible for writing the agency’s System Failure Case Studies. His interests include literally anything that has to do with space, past and present military aircraft, and propulsion technology.

Contact him regarding any article or collaboration ideas by e-mail at william.kucinski@sae.org.