储氢材料85Mg10C4Ni1Al的制备及性能研究

Preparation of 85Mg10C4Ni1Al hydrogen-storage material and its hydrogenation properties

在Mg粉中添加微晶碳及少量Ni和Al，用机械力化学法氢气反应球磨制备储氢材料。球磨2～3h即可使Mg完成氢化，Ni和Al的添加可提高储氢密度，降低初始放氢温度和放氢高峰温度，加快放氢速度。储氢材料85Mg10C4Ni1Al的粒度约为100～300nm，其储氢密度达6．0％，初始放氢温度仅220℃，与传统Mg基储氢材料相比其储氢性能有较大改善。

A hydrogen-storage material is prepared from magnesium and crystallite carbon and a small amount of Ni and Al by reaction ball milling under hydrogen atmosphere. The hydriding can be completed within 2 to 3 hours of ball milling. The hydrogen capacity can be increased, the initial dehydriding temperature and maximum dehydriding temperature be decreased, and the dehydriding rate can be increased by the addition of Ni and Al. For hydrogen-storage material 85Mg10CANi1Al, the particle size is about 100 to 300 nm,its hydrogen-storage capacity is up to 6.0 wt. % ,and its initial dehydriding temperature is only 220℃. Its hydrogen-storage properties are much more excellent than traditional Mg-based materials.