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Beginning to Commercialize Lithium Sulfur Batteries which have the potential …

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Tweet OXIS is the first company to commercialize lithium sulfur batteries. OXIS has been achieving 20-percent year-over-year improvements for cells that are presently delivering 200 Wh/kg at the pouch cell level, 350 Wh/kg at the coin cell level, and with promise of a doubling or more in the next 2-3 years.

Li-S battery manufacturing can use existing, excess battery manufacturing facilities with minimal modifications. Li-S batteries could scale to over batteries for over 100,000 electric vehicles and get costs down to $65/kwh.

This is not a whole lot better than li-ion, but Li-S offers other benefits not least of which is major upside potential.
The theoretical energy density of lithium-sulfur is actually 2,700 Wh/kg, or five times that of lithium-ion.

IBM has said lithium-air will be practical some time in the early 2020s – how it can have 2020 vision a decade into the future is a good critical question, but we digress. In any case, OXIS’ statements are of what it has in its hands now. OXIS does concede Li-Air is the next step beyond Li-S, but Crittenden says he doesn’t think Li-Air will be ready until after 2030.

Despite the U.S. government demanding more for Li-S before using it for electric car batteries, other government entities – particularly the military – see reason to get started now.

Crittenden says energy storage systems using metallic lithium offer the highest specific energy, and OXIS has also received support for UK Ministry of Defense battery packs to be carried by NATO soldiers. Soldiers must carry 8 kg or so, and if this can be cut in half, that is a huge tactical advantage in the eyes of commanders.
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