LiF-BaF_2-LiCl熔盐体系中Li^+的电化学行为  

Electrochemical Behavior of Li^+ in LiF-BaF_2-LiCl Molten Salt System

作　　者：杨少华[1] 王君[1] 赖晓晖[1] 王浩然[1] 

机构地区：[1]江西理工大学冶金与化学工程学院,江西赣州341000

出　　处：《电化学》2016年第3期306-310,共5页Journal of Electrochemistry

基　　金：国家自然科学基金项目(No.3203204516)资助

摘　　要：运用三电极在电化学工作站AUTOLAB以循环伏安法、计时电流法和计时电位法研究了LiF-BaF_2-LiCl熔盐体系中1203 K温度下锂在钨(W)电极上的电化学还原过程及其控制步骤.结果表明,Li^+在W电极上的还原过程是一步得电子的准可逆反应,析出电位在-1.0 V附近.阴极过程受离子的扩散步骤控制,计算得出扩散系数为4.5×10^(-6)cm^2·s^(-1).The electrochemical reduction process and rate determining step of Li ion on a tungsten electrode at 1203 K in a LiF-BaF_2-LiCl molten system were studied by cyclic voltammetry, chronoamperometry and chronopotentiometry methods using a three-electrode system and electrochemical workstation AUTOLAB. The results showed that the reduction potential of Li ion was at around-1.0 V on a tungsten electrode as compared with a platinum electrode. The reduction process of Li ion on a tungsten electrode occurred in a single step with the exchange of one electron. Chronoamperograms indicated that the cathode process was controlled by the diffusion step of ions and the diffusion coefficient was calculated to be 4.5 × 10^（-6）cm^2·s^（-1）.

关 键 词：熔盐 阴极过程 电化学 扩散控制 

分 类 号：O646.54[理学—物理化学]