| 摘要 |
A secondary cell, in particular a lithium-sulfur cell, that encompasses a cathode having an electrochemically active cathode active material, an anode having an electrochemically active anode active material, and a liquid electrolyte, the cathode active material and/or anode active material changing, in the context of the charging or discharging operation, from a solid phase form into a liquid phase form that is soluble in the electrolyte. To increase the charging/discharging rate and cycle stability and to decrease overvoltages, the secondary cell encompasses at least one redox additive that is soluble in reduced form and oxidized form in the electrolyte and that is suitable for reacting with the phase-changing electrode active material in a redox reaction in such a way that the electrode active material is convertible from the solid phase form into the liquid phase form. |
