氢气泡模板法电沉积La-Ni合金薄膜电极  

Deposited La-Ni alloy thin-film electrodes by using hydrogen bubbles as template

作　　者：夏同驰[1] 张侠[2] 张林森[1] 董会超[1] 李晓峰[1] 

机构地区：[1]郑州轻工业学院材料与化工学院河南省表界面科学重点实验室,河南郑州450001 [2]北京工业大学实验学院,北京101101

出　　处：《电源技术》2015年第7期1449-1451,共3页Chinese Journal of Power Sources

基　　金：河南省工业攻关项目(102102210140);河南省教育厅自然科学研究计划项目(2010A53001)

摘　　要：在强阴极极化下,以析出的氢气泡为模板,电沉积制备了La-Ni贮氢合金薄膜电极。采用扫描电子显微镜(SEM)及X射线衍射仪(XRD)对合金薄膜电极的表面形态和结构进行了表征;以循环伏安、恒电流充放电实验考察了合金薄膜电极的电化学行为。结果表明,合金薄膜电极含La Ni5相,电化学吸放氢性能好,最高电化学放电比容量达286 m Ah/g,无需活化过程,首次充放电即可达到最高放电容量,作为氢镍电池的负极,在1.2 V附近有一个平稳的放电平台。La-Ni hydrogen storage alloy thin-film electrode was prepared using hydrogen bubbles as template in strong cathodic polarization. Morphologies and structures of alloy thin-film electrode were characterized by X-ray diffraction and scanning electron microscopy. The electrochemical performance of alloy thin-film electrode was studied using cycle voltammetry and charge-discharge tests. The results show that the main composition is LaNis, which has better hydrogen storage and desorption capability. The highest discharge capacity is 286 mAh/g. Ni-MH batteries using the alloy films as cathode had steady discharge plateau and the first charge-discharge capacity of the alloy films will reach the highest in the no activated treatment.

关 键 词：电沉积 氢气泡模板 镧镍合金薄膜电极 电化学性能 

分 类 号：TM912[电气工程—电力电子与电力传动]