LiBH_4/Mg复合氢化物的储氢性能研究

Hydrogen Storage Performance of LiBH_4 /Mg Complex Hydrides

通过球磨LiBH4/Mg,使得镁的吸放氢性能得到明显改善。活化结果显示,在氩气气氛下,球磨1h的LiBH4/Mg混合物经250℃,60min处理后的吸氢量可以达到6.7%(质量分数,下同)。200℃,80min处理后的吸氢量可以达到3.0%。而纯镁粉在相同条件下几乎不吸氢。PCT结果显示,LiBH4也明显改善镁氢化后的放氢性能。

The effects of LiBH4 on the hydrogen storage performance of magnesium were investigated. The LiBH4/Mg mixtures with a mass ratio of 1：4 and 1：10 were prepared by ball milling in argon gas for 1 h. It is found that the prepared LiBH4/Mg mixture exhibits superior kinetics compared with the pure magnesium powder. For example, at 250 ℃, a capacity of 6.7 wt % hydrogen was achieved in 60 min for LiBH4/Mg mixture, while only 1.2 wt % hydrogen was absorbed for pure Mg at 300 ℃ in 80 min. It suggests that LiBH4 can play an important role in improving the hydrogen storage performance of magnesium.