Structural, solid-gas and electrochemical characterization of Mg2Ni-rich and MgxNi100-x amorphous-rich nanomaterials obtained by mechanical alloying
Structural, solid-gas and electrochemical characterization of Mg2Ni-rich and MgxNi100-x amorphous-rich nanomaterials obtained by mechanical alloying
复制标题
机械合金化富 Mg2Ni 和 MgxNi100-x 富非晶纳米材料的结构、固气和电化学表征
DOI：
10.1016/j.ijhydene.2005.04.044
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发表时间：
2006
影响因子：
7.2
通讯作者：
H. Zarrouk
中科院分区：
文献类型：
--
作者：
M. Abdellaoui;S. Mokbli;F. Cuevas;M. Latroche;A. Guégan;H. Zarrouk
利用行星球磨机，从镁和镍原子比为2:1的混合物开始，成功制备了由高比例Mg2Ni相、少量残余Ni和非晶相组成的纳米复合材料。铣削强度为7和10，分别对应3.5和10W/g的冲击功率，铣削18和4h后合成该复合材料。据报道，在3.5W/g冲击功率下合成24h的复合材料吸氢量为3.75Hmol-1（3.53wt%）。采用相同的行星球磨机，从Mg原子含量为40 ~ 60at%的Mg2Ni和Ni混合物开始，制备了少量残余Ni的非晶相合金。在6.49W/g冲击功率下，mg40ni60和mg60ni40样品的铣削时间分别为8 ~ 10h，非晶相的合成进行。在铣削时间比文献报道短10倍的情况下，得到的mg50ni50样品的最佳电化学容量为470mAh/g。
Using a planetary ball mill and starting from a mixture of Mg and Ni with an atomic ration of 2:1, we successfully elaborated a nanocomposite material formed by the Mg2Ni phase in high proportion, some residual Ni and an amorphous phase. The synthesis of this composite proceeded at milling intensities 7 and 10, corresponding to 3.5 and 10W/g shock power, respectively, after 18 and 4h. The best hydrogen absorption capacity reported, 3.75Hmol-1(3.53wt%) is for the composite synthesized for 24h at 3.5W/g shock power. Using the same planetary ball mill and starting from a mixture of Mg2Ni and Ni with a Mg atomic content ranging from 40 to 60at%, we elaborated amorphous phase alloys with little quantities of residual Ni. The synthesis of the amorphous phase proceeded at 6.49W/g shock power, for milling durations ranging from 8 to 10h for Mg40Ni60and Mg60Ni40samples, respectively. The best electrochemical capacity (470mAh/g) was obtained for the Mg50Ni50sample obtained at milling duration 10 times shorter than that reported in the literature.