电沉积镧镍合金薄膜的电化学贮氢性能研究

Study on Electrochemical Hydrogen Storage Performance of Electrodeposited La-Ni Alloy Film

摘要:

利用在水溶液中电沉积的方法制备了LaNi5贮氢合金薄膜。采用XRD方法研究了贮氢合金薄膜在充放电前后相结构的变化，运用扫描电镜观察了合金薄膜的表面形态，通过电化学测试（循环伏安、恒电流充放电）研究其电化学贮氢性能。结果表明，该合金薄膜具有较好的电化学贮氢性能，电化学活性较高，无需活化过程，最高电化学容量可达156mAh／g。

Abstract:

The film of La-Ni alloy was prepared by electrodepositing method in an aqueous solution. The structures of film before and after charge-discharge cycles were measured by XRD and the surface feature was observed by SEM. The electrochemical hydrogen storage performance of the film was studied by cyclic voltammetry and electrochemical impedance spectrum. The results showed that the film had a good electrochemical activity, unnecessary for an activation procedure and the maximum electrochemical capacity was 156 mAh/g.