Mixture is better: enhanced electrochemical performance of phenyl selenosulfide in rechargeable lithium batteries.

Phenyl selenosulfide (PhS-SePh) is synthesized by an exchange reaction between phenyl disulfide and diselenide. PhS-SePh possesses average values of lattice parameters, bond character, and the lowest unoccupied molecular orbital as expected, but displays a higher discharge voltage plateau and much better cycling stability than the two precursors in rechargeable lithium batteries.