the battery in its internal circuit elemental sulphur and the end products of sulphur reduction lithium sulphide or disulphide are known to be poorly soluble in most organic solvents in contrast lithium polysulphides intermediate forms produced during the reduction of elemental sulphur or during oxidation of lithium sulphide and disulphide are well soluble in many organic solvents the rate of sulphur transfer between the positive and negative electrodes of lithium sulphur batteries is determined by the form of sulphur present in the electrolyte solution the form of sulphur and sulphur lithium compounds present in the electrolytes of lithium sulphur batteries depends on the electrolyte system composition and the properties thereof in particular it depends on the polarity and donor properties of the solvents used and by the concentration of the supporting salts lithium polysulphides may be present in electrolyte systems in three forms molecular mono anionic and di anionic hence sulphur in the electrolyte can be transferred either in molecular neutral or in ionic anionic form the diffusion of elemental sulphur and non dissociated lithium polysulphides dissolved in the electrolyte contributes to the molecular transfer of sulphur the diffusion and electromigration of the mono and di anions of polysulphides as well as sulphur anion radicals contributes to the ionic form of sulphur transfer the existence of two mechanisms increases the overall sulphur transfer the sulphur transfer will be higher in the.