纳米Ti掺杂Mg(NH2)2/2LiH复合材料储氢性能

摘要

The kinetics properties of 5％ Nano-Ti doped Mg (NH2)2/2LiH mixture prepared by mechanical milling were investigated by Sievert's type apparatus, TPD vice, and isovolumic method. Temperature-programmed-desorption and Sievert's technology test showed that the 5％ Nano-Ti doped Mg(NH2)2/2LiH mixture exhibited a 43 ℃ lower desorption peak temperature compared to the pure Mg(NH2)2/2LiH, and can desorb 4.2％ of hydrogen which is great more than the 2.1％ for the pure Mg(NH2)2/2LiH mixture to 0. 1 MPa at 180 ℃ in 100 minutes. XRD and SEM were applied to analyze why the Nano-Ti can enhanced the kinetics of Mg(NH2)2/2LiH mixture.%采用机械球磨法在Mg(NH<,2>)<,2>/2 LiH中添加5%(质量分数)纳米Ti粉合成了复合储氢材料.升温脱附法(TPD)及等容法储氢性能测试表明,纳米Ti粉使Mg(NH<,2>)<,2>/2LiH的放氢峰温度降低了43℃,且180℃、0.1 MPa氢压下,添加纳米Ti粉复合材料前100 min放氢量为4.2%(质量分数),而未添加Ti粉的复合材料前100 min的放氢量只有2.1%(质量分数).运用X射线荧光分析(XRD)、扫描电镜(SEM)和背散射电子像分析了复合材料动力学性能提高的原因.