电沉积制备La-Mg-Ni贮氢合金薄膜及其性能的研究

Study on Electrodeposited Film of La-Mg-Ni Hydrogen Storage Alloy and Its Performance

采用恒电流沉积方法在水溶液中沉积出LaMgNi4合金薄膜。利用循环伏安、模拟电池充放电循环、扫描电镜(SEM)以及X射线衍射(XRD)等方法研究了电沉积合金薄膜的电化学性能和表面形貌及结构。结果表明,该合金薄膜作为贮氢电极具有较好的电化学性能,其电化学活性高,活化性能好,首次充放电比容量达398mAh/g。

The film of LaMgNi4 alloy was prepared by constant-current electrodeposition method in an aqueous solution. The electrochemical performance, surface morphology and structure of the film were studied by cyclic voltammetry, charge-discharge cycle,SEM and XRD. The results show that as a hydrogen storage electrode, the film has good electrochemical activity with no need for an activation procedure and the capacity reached 398 mAh/g in the first cycle.