球磨时间对Mg_(2-x)Zr_xNi(x=0~0.6)电极合金微观结构及电化学性能的影响(英文)  

Effects of Ball-Milling Duration on Microstructure and Electrochemical Characteristics of Mg_(2-x)Zr_xNi(x=0~0.6) Electrode Alloys

作　　者：张羊换[1] 赵栋梁[1] 韩晓英[1] 董小平[1] 郭世海[1] 王新林[1] 

机构地区：[1]钢铁研究总院

出　　处：《稀有金属材料与工程》2008年第2期245-250,共6页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(50642033);Science and Technology Planned Project of Inner Mongolia,China(20050205);Higher Education Science Research Project of Inner Mongolia,China(NJ05064)

摘　　要：在不同的球磨时间下,应用机械合金化法制备出Mg2-xZrxNi(x=0,0.15,0.3,0.45,0.6)电极合金。系统地测试了合金的微观结构及电化学性能,研究了球磨时间对合金微观结构及电化学性能的影响。XRD及TEM的分析结果表明,合金中的非晶相随球磨时间的延长而增加。电化学测试的结果显示,随球磨时间的增加,合金的循环稳定性及放电电压特性得到显著改善。球磨时间对合金容量的影响与合金的成分相关,对于x≤0.3的合金,其放电容量随球磨时间的延长而单调增加;而对于x>0.3的合金,放电容量随球磨时间的增加有一个极大值。The Mg2Ni-type electrode alloys Mg2-xZrxNi （x=0, 0.15, 0.3, 0.45 and 0.6） were prepared by mechanical alloying （MA） with different ball-milling duration. The microstructures and the electrochemical characteristics of the experimental alloys were tested and measured systemically. The effects of ball-milling duration on the microstructures and electrochemical performances of the alloys were investigated in detail. The results obtained by XRD and TEM show that the amorphous phase in the alloy increases with prolonging of ball-milling duration. The electrochemical measurements indicate that the cycle stability and the discharge potential characteristics of the alloys are markedly improved with prolonging of ball-milling duration. The effect of the ball-milling duration on the discharge capacity of the alloys is dependent on their composition. For x ≤0.3, the discharge capacity of the alloys monotonically increases with prolonging of milling duration. But for x〉0.3, it has a maximum value with the change of milling duration.

关 键 词：Mg2Ni型电极合金 机械合金化 微观结构 电化学性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程]