Facile one step synthesis of Sulfur nanostructured for High performance Lithium Sulfur Batteries

Among existing electrochemical systems, Lithium/sulfur batteries have attracted great deal of interest as a promising candidate for next-generation electrical energy storage. Since Sulfur has theoretical specific capacity of 1673mAh/g and energy density of 2600 Wh/Kg Li/S batteries have a 3 to 5 fold higher theoretical energy density than lithium-ion batteries. Here we have fabricated Lithium Sulfur battery using sulfur as the cathode material. Sulfur in the forms of micro and nanostructured has been used for this purpose. A simple chemical method applied for the synthesizing of sulfur nanoparticles. The prepared sulfur nanostructured characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM) techniques. The SEM images show that the particles size of sulfur nanostructured is about 70 nm, while the average grain size of commercial sulfur powder is around 20μm. The obtained results demonstrated the nano-sized effect of sulfur on electrochemical performance of half-cell. Therefore it would be possible to investigate the nano-sizing impact of sulfur on the dissolution of lithium polysulfide which is a key factor for the success of lithium–sulfur batteries.

کلیدواژه ها:

lithium sulfur battery ، sulfur ، nanostructured ، cathode