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The month wouldn't be complete without another battery technology breakthrough, and this time it's the turn of lithium-sulfur technology.
Researchers at the US Department of Energy’s Lawrence Berkeley National Laboratory are experimenting with a lithium-sulfur battery design with twice the specific energy of lithium-ion batteries, and a usefully long life under repeated charging and discharging cycles.
According to Green Car Congress, such batteries would also be cheaper and safer than lithium-ion designs--without the overheating and fire issues that have made the news over the last few years.
In a paper in the ACS journal Nano Letters, the researchers explained how they've overcome one of the main limitations of existing lithium-sulfur designs--a poor life cycle.
Normally, lithium polysulfide particles dissolve in the electrolyte during discharging and react with the lithium anode, forming a barrier layer. The conversion reaction under charging and discharging can also cause the sulfur electrode to swell and contract, causing damage.
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