Hydrogen absorption and electrochemical properties of Mg2Ni-type alloys synthesized by mechanical alloying
Hydrogen absorption and electrochemical properties of Mg2Ni-type alloys synthesized by mechanical alloying
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DOI：
10.1016/j.jpowsour.2005.09.030
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发表时间：
2006-07
影响因子：
9.2
通讯作者：
M. Simičić;M. Zdujić;R. Dimitrijević;Ljiljana Nikolić-Bujanović;N. H. Popović
中科院分区：
文献类型：
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作者：
M. Simičić;M. Zdujić;R. Dimitrijević;Ljiljana Nikolić-Bujanović;N. H. Popović
以相应的元素粉末混合物为原料，通过机械合金化和热处理，合成了Mg2Ni型合金，即Mg2Ni、Mg2Ni0.75Cu0.25、mg2ni0.6 cu0.4和mg2ni0.75 v0.25。采用手动控制的Sieverts装置测量了退火材料的吸氢和解吸动力学。采用恒流充放电电极，测试了mg2ni型合金在室温下的储氢性能。Cu和V对Ni的部分取代增加了200℃下的氢吸附和解吸，提高了室温下的电化学存储容量和循环寿命。
Mg2Ni-type alloys, i.e., Mg2Ni, Mg2Ni0.75Cu0.25, Mg2Ni0.6Cu0.4and Mg2Ni0.75V0.25were synthesized by mechanical alloying and subsequent thermal treatment starting from a corresponding elemental powder mixture. The kinetics of hydrogen absorption and desorption of annealed materials were measured using a manually controlled Sieverts apparatus. The electrochemical characteristics of Mg2Ni-type alloys were tested for their ability to store hydrogen at room temperature by using constant current to charge and discharge the electrode. The partial substitutions of Cu and V for Ni increased hydrogen absorption and desorption at 200°C and improved the electrochemical storage capacity and cycle life at room temperature.