【摘要】 利用1,4-二氧六环对锂金属电极表面进行预处理,使之钝化,以提高电极的界面稳定性和充放电循环性能。结果表明:1,4-二氧六环可以在锂金属表面发生聚合,预先形成性能良好的SEI(Solid Electrolyte Interface)钝化膜,提高电解液中锂金属电极的界面稳定性,同时表面预处理并不会降低锂电极的动力学性能。锂电极的充放电循环效率测试和锂金属电池的循环性能测试表明:经过1,4-二氧六环表面预处理的锂金属电极与未经预处理的锂金属电极相比,无论是电极的充放电效率,还是由其所组成电池的放电性能与循环寿命都得到了较大提高。更多还原

【Abstract】 In this work, 1,4-dioxane (cyclic ether ) was used to pre-treat the surface of Li electrode in order to passivate Li electrode and improve its interfacial stability and charge/discharge cycleability. It Is found that 1,4-dioxane can polymerize and form a good SEI passivating layer on the surface of Li electrode. This layer is able to enhance the interfacial stability of Li electrode without depress its kinetic behavior. Further measurements of charge/discharge efficiency of treated/bare Li electrodes and cycleability of Li metal cells fabricated with different Li anodes show that the Li electrode treated with 1,4-dioxane has higher charge/discharge efficiency compared with that of bare Li electrode, and the cell with such anode has better discharging performance and cycle life.更多还原