A SIMPLE APPROACH TO PREPARE SULFUR/PVDF COMPOSITE FOR LITHIUM/SULFUR BATTERIES

Abstract

In recent years, rechargeable Li–S batteries have gained great attraction, because of their high theoretical energy density (2600 Whkg–1) and high theoretical
specific capacity (1675 mAhg–1 ).Sulfur is naturally abundant, inexpensive and nontoxic. Despite this, the practical development of the Li–S batteries is a formidable challenge, because of few critical issues including the highly insulating nature of sulfur, high solubility of lithium polysulfides in the electrolyte and volume expansion of the active material. To effectively restrain the dissolution and diffusion of polysulfides and strengthen the electronic conductivity of sulfur composite, coating sulfur with polymers were developed. In this work, a facile preparation for S/PVDF composite via solid state reaction has been carried out. The structure
and morphology of the obtained sample was characterized by XRD, FTIR, RAMAN and HR- SEM and the results are discussed.