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中文摘要：
在氩气气氛下，采用机械球磨法制备AICl3掺杂的4MgHz-LisAlH6储氢材料，研究A1C1s对4MgH2-Li3AlH6脱氢性能的影响。借助热重（TG）法研究了4MgH2-Li3A1H6-A1C13体系的放氢性能，并运用X射线衍射（XRD）分析和差示扫描量热（DSC）法对其反应机理进行了探索。实验结果表明，加入Alcl3可有效增加4MgH2-Li3A1H6体系的反应活性，促进二者分解放氢，并降低该体系的放氢温度，增大总脱氢量。当A1C1。的掺杂量为4％（摩尔分数）、磨球24颗、球磨时间2．0h和转速541r／rain时，4MgH2-Li3AlH6-AlCl3体系起始放氢温度降至130℃，比4MgH：Li3AlH6体系降低了43℃；且400℃时总脱氢量从5．5％（质量分数）增加到6．3％（质量分数）。同时，机理研究表明：在球磨过程中部分Li。AlH。和A1C13发生反应，产生了活性Al，进而改善了体系的放氢性能。
英文摘要：
The hydrogen storage material of A1Cla doped 4MgHe-LiaA1HG was successfully prepared by me- chanical milling under an argon atmosphere. The effect of AICI3 on the dehydrogenation of 4MgHz-Lia AIH6 has been studied. The dehydrogenation performances of 4MgH2-I.ia AIH~-A1Cla system were investigated by TG. The reaction mechanism was analyzed by XRD and DSC. The results show that A1Cla as additive effectively increased the reaction activity of 4MgI-te-Li3A1H6, reduced the system dehydrogenation temperature and enhanced the dehydrogenate capaci- ty. When 4 mol%AlCI3 was doped into 4MgHe-Li3AIH6, initial dehydrogenation temperature of this system was a- bout 130 °C which was lower 43 ~C than 4MgHz-LiaA1H6＇s,and the total amount of dehydrogenation increased from 5.5wt% to 6.3wt% （up to 400 °C）. Meantime, the study on the mechanism of dehydrogenation for 4MgH2-Lia A1H6- A1CIa system shows that a part of Lia A1Hs reacted with AICla during ball-milled and activity AI was produced in situ. The activity AI helped to improve dehydrogenation performances of the system.
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