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 ofthe 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.
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