金属锂在含多硫化物电解液中的稳定性研究

采用交流阻抗法、循环伏安法对金属锂在含多硫化物电解液和不含多硫化物电解液中生成的表面固体电解质界面膜(SEI膜)的稳定性进行了研究。结果表明，与在不含多硫化物电解液中形成的SEI膜相比，金属锂在含多硫化物电解液中形成的SEI膜更稳定，导电性更好，多次循环后金属锂表面没有明显的枝晶、粉化发生，金属锂在含多硫化物电解液中的交换电流密度和充放电效率更高。

Stability of the lithium metal in an electrolyte containing polysulfides

The stability of lithium solid electrolyte interface(SEI)membranes in different electrolytes has been investigated using AC impedance and cyclic voltammetry methods. The results showed that the lithium SEI membranes formed in an electrolyte containing polysulfide anions were more stable than those formed in a conventional electrolyte, and also had better electrical conductivity. Furthermore, after several cycles, the lithium metal showed no obvious dendrite formation or pulverization in the electrolyte containing polysulfides. The kinetic performance of the lithium metal in the electrolyte containing polysulfides was also better than that in a conventional electrolyte.