Molybdenum disulfide is used as an anode coating to improve the energy density of lithium-sulfur batteries.

According to foreign media reports, the university of Texas at Dallas (The University of Texasat Dallas) in 2 d molybdenum disulfide (molybdenumdisulfide, MoS2) as a lithium metal battery Anode protective layer and improved the performance of lithium sulfur batteries.

The researchers used molybdenum disulfide, designed to improve lithium electricity stability of the deposit (Lielectro deposition) and inhibit the formation of lithium crystal chandelierspecial (dendritenucleationsites).

The researchers used with molybdenum disulfide of lithium and 3 d carbon nanotubes - sulfur (3 d carbon nanotube - sulfur) respectively as the lithium-sulfur battery anode and cathode, the specific energy density (specific energy density) for ~ 589?Wh /?Kg, at 0.Under 5 ℃ after 1200 times charging and discharging, the coulomb efficiency (Coulombic efficiency) for ~ 98%.

The way or will achieve high energy density, improve the safety of the lithium battery. In contrast to lithium ion batteries, lithium sulfur batteries have many advantages, cost relatively cheap, light weight, energy storage is almost twice of lithium ion batteries, and environmental protection is better.

However, sulfur is a poor conductor performance (electrical conductor), charge and discharge times, only the material becomes unstable. The lithium sulfur batteries failed to become the mainstream product of another reason is that the electrode decomposition (Electrodes breaking down).

And molybdenum metal factory is often used in steel hardness increase and hardening, when it is combined with two sulfur atoms, generated by the material can be used to adjust the thickness of the coating. The researchers found that the material can improve the stability of the sulfur and its electrical conductivity, thereby gaining greater energy density, expansion of the commercialization of lithium sulfur batteries.

The study won the south Korean technology assessment and sarft (Korea In statute of Energy Technology Evaluation and Planning KETEP) and national research fund innovation materials exploration project (National Research Foundation of Creative Materials Discovery Program) of financial support.

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