The electrochemical behavior of polysulfides in tetrahydrofuran

The oxidation-reduction process of sulfur and polysulfides was studied at a glassy carbon electrode in 1M LiClO4-THF solution using a programmed cyclic voltammetry technique. Over the range 1300 to −2000 mV (vs. porous carbon in lithium polysulfide solution), one anodic and up to three cathodic peaks were found. All of them correspond to irreversible processes. Kinetic parameters were evaluated and plausible mechanisms have been suggested.