University of Texas uses molybdenum disulfide as anode coating to enhance lithium-sulfur battery energy density

According to foreign media reports, The University of Texas at Dallas uses 2D molybdenum disulfide (MoS2) as a protective layer for lithium metal battery anodes, significantly improving the performance of lithium-sulfur batteries.

The researchers used molybdenum disulfide to improve the stability of lithium electrodeposition (Li electrodeposition) and inhibit the formation of dendrite nucleation sites.

Researchers used lithium coated with molybdenum disulfide and 3D carbon nanotube-sulfur as the anode and cathode of the lithium-sulfur battery, and their specific energy density was ~589 Wh/. Kg, Coulomb efficiency is ~98% after 1200 charge and discharge at 0.5°C.

This approach will achieve high energy density and improve the safety of lithium metal batteries. Compared to lithium-ion batteries, lithium-sulfur batteries have many advantages. They are relatively inexpensive, light-weight, nearly twice as efficient as lithium-ion batteries, and more environmentally friendly.

However, sulfur is a poorly performing electrical conductor that becomes less stable by charging and discharging only several times. Another reason why lithium-sulfur batteries have not become mainstream products is Electrodees breaking down.

The original molybdenum metal factory is often used to enhance the hardness of steel and hardening, when it is combined with two sulfur atoms, the resulting material can be used to adjust the thickness of the coating. The researchers found that the material can improve the stability and electrical conductivity of sulfur, so as to obtain greater energy density and boost the commercialization of lithium-sulfur batteries.

The study was funded by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the National Research Foundation of Creative Materials Discovery Program.

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