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采用球磨方法制备LaMg_(11)Ni+x%Ni(x=100,200)纳米晶-非晶合金,并利用自动恒电流系统测试合金的电化学储氢性能。使用附带测氢仪的差热分析(DSC)和Sievert’s设备研究合金的气态储氢性能。实验结果表明,Ni含量的增加能显著改善球磨合金的气态及电化学储氢性能。球磨合金的气态吸氢量和吸氢速率随着球磨时间的增加出现最大值。但合金的放氢动力学性能随着球磨时间的增加一直增加。另外,球磨合金的放电容量和高倍率放电性能(DHR)都随球磨时间的增加先增加后减小。
LaMg_ (11) Ni + x% Ni (x = 100,200) nanocrystalline-amorphous alloys were prepared by ball milling. The electrochemical hydrogen storage properties of LaMg_ (11) The alloys were tested for their gaseous hydrogen storage properties using differential thermal analysis (DSC) with Siever’s equipment and a Hydrogen analyzer. The experimental results show that the increase of Ni content can significantly improve the gas and electrochemical hydrogen storage properties of the ball-milled alloy. The hydrogen absorption capacity and hydrogen absorption rate of ball-milled alloy increase with the increase of milling time. However, the kinetic performance of hydrogen desorption of alloy increases with the increase of milling time. In addition, the ball mill alloy discharge capacity and high rate discharge performance (DHR) with ball milling time increases first and then decrease.