摘要
采用扣式电池循环伏安测试(CV)、充放电测试和扫描电子显微(SEM)技术,研究AZ31合金与工业纯镁(99.95%)作为镁二次电池负极材料时的电化学性能和镁在电极表面的沉积形貌。结果表明:作为镁二次电池的负极材料,AZ31合金与工业纯镁相比,其镁的溶解-沉积的过电位稍高,初始循环过程的库仑效率略低,但长期循环的库仑效率稳定,并能有效抑制枝晶镁的形成,且其长期循环性能优于工业纯镁的。
The electrochemical properties and surface morphologies of AZ31 alloy and commercial pure Mg as anode materials for rechargeable magnesium batteries were studied by cyclic voltammetry（CV）,constant current charge/discharge measurement of coin-type cells and scanning electron microscopy（SEM）.The results show that the over-potential of dissolution-deposition for magnesium on AZ31 alloy is a little higher than that on commercial pure Mg,and the coulombic efficiency during the initial cycle is lower than that of pure Mg;but the coulombic efficiency of AZ31 remains stable in the long-term cycle.Furthermore,AZ31 alloy effectively restrains the formation of dendrite Mg and improves the cyclic performance of batteries.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2010年第5期885-890,共6页
The Chinese Journal of Nonferrous Metals
基金
上海研发公共服务平台建设专项资助项目(07DZ22911)
关键词
镁二次电池
AZ31合金
工业纯镁
负极材料
电化学性能
表面形貌
rechargeable magnesium battery
AZ31 alloy
commercial pure Mg
anode materials
electrochemical properties
surface morphologies
