不同添加剂在离子液体中对锂电极形貌的影响

在金属锂的沉积过程中,由于锂枝晶的产生,严重阻碍了锂作为阳极应用于金属锂二次电池之中。电解液的组成在金属锂的沉积、溶解过程中发挥着重要的作用,采用电化学沉积的方法探究了8种不同添加剂在离子液体1-丁基-3-甲基咪唑四氟硼酸盐中沉积金属锂形貌的影响。实验结果表明:碳酸乙烯酯作为添加剂时能有效抑制金属锂枝晶的生长,形成较为紧密的锂金属层,为开发一种新型的锂离子电池电解液提供了可能。

Effects of different additives on morphology of lithium electrode in ionic liquid

In the course of the deposition of lithium,the lithium dendrite was seriously hindered the application of the lithium as the anode in the second metal lithium battery.The composition of the electrolyte played an important role in the deposition and dissolution of lithium.Electrochemical deposition method was used to explore the eight kinds of different additives in ionic liquid of 1-butyl-3-methylimidazolium tetrafluoroborate borate lithium metal deposition morphology effect.Experimental results show that Ethylene carbonate (EC) as an additive can effectively inhibit the growth of metal lithium dendrite and form a more compact lithium metal layer,and this provides the possibility to find a new type of lithium ion battery electrolyte.