(哈尔滨工业大学 材料科学与工程学院，哈尔滨 150001)
摘 要: 以氢气作为保护气，用机械合金化的方法，将镁粉、镍粉和氯化铬制备成纳米复合物，实验证明它具有很好的储氢性能。氯化铬起到了提高吸放氢速度和降低放氢温度的作用。在添加CrCl3的样品中，镁粉末在球磨过程中能完全吸氢，而没有添加CrCl3的试样则很难完全吸氢。用机械合金化制备的Mg96Ni3(CrCl3)1纳米复合物在160℃和2MPa氢压条件下，在65s内储氢容量达到6.0%，并能使放氢温度降低到315℃，与不加CrCl3的样品相比，放氢温度降低15～20℃。
关键字: 机械球磨； 储氢材料； Mg-Ni-Cr-Cl3纳米复合物
properties of Mg-Ni systems
（School of Materials Science and Engineering，
Harbin Institute of Technology， Harbin 150001， P.R.China）
Abstract: Effects of CrCl3 on hydrogen storage properties of Mg-Ni system were investigated. The nanocomposite of Mg-Ni-CrCl3 was produced by mechanical milling under hydrogen pressure of 0.6MPa. The nanocomposite has a remarkable kinetics of hydrogenation and dehydrogen，in which CrCl3 plays a key role. It can promote kinetics behavior and decrease temperature of dehydriding. The sample containing CrCl3 can completely absorb hydrogen in ball milling process. For example, the nanocomposite of Mg96Ni3(CrCl3)1 can absorb 6.0% hydrogen in 65s at 160℃ under 2.0MPa hydrogen pressure and decrease temperature of dehydriding about 15～20℃ compared with that without CrCl3.
Key words: mechanical milling; hydrogen storage materials; nanocomposite Mg-Ni-Cr-Cl3
