金属锂在含多硫化物电解液中的稳定性研究  

Stability of the lithium metal in an electrolyte containing polysulfides

作　　者：王梦佳[1] 赵春荣[2] 王维坤[2] 余仲宝[2] 王安邦[2] 苑克国[2] 黄雅钦[1] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029 [2]防化研究院军用化学电源研究与发展中心,北京100191

出　　处：《北京化工大学学报（自然科学版）》2013年第5期34-38,共5页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家"863"计划(2012AA052202)

摘　　要：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。The stability of lithium solid electrolyte interface （SEI） membranes in different electrolytes has been in vestigated using AC impedance and cyclic voltammetry methods. The results showed that the lithium SEI mem branes 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.

关 键 词：锂-硫二次电池 金属锂 固体电解质界面膜 稳定性 

分 类 号：TM912.9[电气工程—电力电子与电力传动]