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08.03.2017, 12:25 - anyoshoes - Rank 6 - 1072 Posts
first place,
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,” Zavadil says. The goal is to produce a working prototype of the new battery — one that can last through thousands of cycles — by the end of 2017.
At the University of Texas at Austin,
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, materials engineer Guihua Yu, along with colleagues at Zhejiang University of Technology in Hangzhou, China, is investigating another work-around for this battery type: replacing the solid sulfur cathode with an intricate structure that encapsulates the sulfur in an array of nanotubes. Reported in the November issue of Nano Letters,
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, the nanotubes that encase the sulfur are fashioned from manganese dioxide, a material that can attract and hold on to polysulfides. The nanotubes are coated with polypyrrole, a conductive polymer that helps boost the flow of electrons.
This approach reduces buildup and boosts overall conductivity and efficiency,
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, Yu says. So far, with the group’s new architecture,
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, the battery loses less than 0.07 percent of its capacity per charge and discharge cycle. After 500 cycles,
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, the battery maintained about 65 percent of its original capacity, a great improvement over the short lifetime of current lithium-sulfur batteries. Still, for use in electric vehicles, scientists want batteries that can last through thousands of cycles,
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, or 10 to 15 years.

Battery: Magnesium-ion


How it works: Similar to lithium-ion batteries,
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, but magnesium ions do the work


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