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Building better batteries: Researchers report new approach to improving lithium-sulfur batteries
http://www.udel.edu/udaily/2017/march/building-better-lithium-sulfur-batteries/[font face=Serif][font size=5]Building better batteries[/font]
Article by Diane Kukich Photo by Kathy F. Atkinson March 06, 2017
[font size=4]Researchers report new approach to improving lithium-sulfur batteries[/font]
[font size=3]Rechargeable lithium-ion batteries are the power behind most modern portable electronics, including cell phones, tablets, laptops, fitness trackers, and smart watches. However, their energy density — that is, the amount of energy stored within a given amount of physical space, or mass — will need to be improved for these batteries to see widespread use in smart grid and electric transport applications.
In contrast, the energy density of lithium-sulfur (Li-S) batteries is five times higher than that of Li-ion batteries. That advantage, combined with low cost, suggests that this alternative technology shows promise for high-energy storage applications.
But the use of Li-S batteries is limited by a different problem: rapid capacity fade, which means that the amount of charge these batteries can deliver at the rated voltage decreases significantly with use.
…
Now, Wei and colleagues have demonstrated a new polysulfide entrapping strategy that greatly improves the cycle stability of Li-S batteries.
…[/font][/font]
https://doi.org/10.1002/adma.201604724Article by Diane Kukich Photo by Kathy F. Atkinson March 06, 2017
[font size=4]Researchers report new approach to improving lithium-sulfur batteries[/font]
[font size=3]Rechargeable lithium-ion batteries are the power behind most modern portable electronics, including cell phones, tablets, laptops, fitness trackers, and smart watches. However, their energy density — that is, the amount of energy stored within a given amount of physical space, or mass — will need to be improved for these batteries to see widespread use in smart grid and electric transport applications.
In contrast, the energy density of lithium-sulfur (Li-S) batteries is five times higher than that of Li-ion batteries. That advantage, combined with low cost, suggests that this alternative technology shows promise for high-energy storage applications.
But the use of Li-S batteries is limited by a different problem: rapid capacity fade, which means that the amount of charge these batteries can deliver at the rated voltage decreases significantly with use.
…
Now, Wei and colleagues have demonstrated a new polysulfide entrapping strategy that greatly improves the cycle stability of Li-S batteries.
…[/font][/font]
