Chemical stability and electrochemical activity of xenon difluoride in propylene carbonate

Xenon difluoride dissolved in dried propylene carbonate (PC) is stable against not only the solvent but also metallic lithium immersed in the solution. In an electrochemical cell (Li/LiPF6 (1 M), XeF2 (0.1–0.3 M)/graphite), having a cell voltage of 4.2 V, XeF2 is reduced on the graphite cathode to give lithium fluoride and elemental xenon. The Faraday efficiency was about 80%.