Lithium-sulfur battery with sugar holds 5 times more energy

Lithium-sulfur batteries store energy well, about five times more than modern lithium-ion batteries.

The authors of the new paper developed a new design for this architecture, in which they used sugar to make the battery more stable. As a result, she was able to work for more than 1000 cycles.

Previously scientists have researched the potential of lithium sulfurbatteries, but these experiments did not enter the market due to low stability: during charging, the positive sulfur electrode of the battery expands and contracts, and is also exposed to severe stress and wear out quickly. In addition, the negative electrode is contaminated with sulfur compounds.

Previously, scientists have partially solved this problem:they have developed a special binder that creates extra space around the sulfur particles, which means there is more room for safe expansion while charging. They managed to make a battery that can withstand more than 200 cycles.

The authors of the new work aimed at negativea lithium electrode that is contaminated with sulfur compounds. It was previously known that some sugar-based substances can prevent degradation in geological sediments and also maintain strong bonds between sulfides.

As a result, the researchers made a supplement forsugar-based for the mesh architecture of the electrode: it acts as a binder and forms mesh microstructures that help regulate the behavior of polysulfides. As a result, the battery with sugar showed a performance of about 700 mAh per gram and lasted over 1000 cycles.

The researchers note that their technology is capable of storing two to five times more energy than modern lithium batteries.

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