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Advances in Lithium-Sulfur Batteries

“Lightweight Battery systems using metallic Lithium are known to offer the highest specific energy. Sulfur represents a natural cathode partner for metallic Li and, in contrast with conventional lithium-ion cells, the chemicals processes include dissolution from the anode surface during discharge and reverse lithium plating to the anode while charging. As a consequence, Li-S allows for a theoretical specific energy in excess of 2700Wh/kg, which is nearly 5 times higher than that of Li-ion. OXIS’s next generation lithium technology platform offers the highest energy density among lithium chemistry: 400 Wh/kg already achieved at cell level… Cost Effectiveness Li-S production cost projections are significantly lower than Li-Ion due to lower raw material cost (i.e. Sulfur) and high energy density (less material required for same energy). This cost advantage is expected to be a key driver for widespread adoption of Li-S technology. Full discharge OXIS cells have a 100% available Depth-of-Discharge. This compares with Li-ion batteries which are only used across 80% (or less) of their available discharge range. OXIS cells use all their stored energy – full discharge. Maintenance free OXIS cells have an indefinite shelf-life, with no charging required when left for extended period. Li-ion batteries require a recharge every 3-6 months to prevent failure and often causes significant warranty issues. Eco friendly The OXIS Li-S chemistry is considered to have less environmental impact when compared to other technologies such as Li-ion. The Li-S cell utilises sulfur in place of heavy metals such as cobalt, which have a significant environmental impact, whereas the sulfur used in OXIS manufacture is a recycled material, a by-product of the oil industry.”

[oxisenergy.com] – Company site
[oxisenergy.com] – Li-S, Lithium-Sulfur, an energy revolution
[wikipedia.org] – Lithium–sulfur battery
[data sheet] – Ultra Light Lithium Sulfur Pouch Cell

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