LiAlH_4/2LiNH_2复合体系的储氢性能  

Investigation on Hydrogen Storage Properties of LiAlH_4/2LiNH_2 Composite

作　　者：徐楼[1] 杨敬葵[1] 李寿权[1] 葛红卫[1] 王新华[1] 

机构地区：[1]浙江大学,浙江杭州310027

出　　处：《稀有金属材料与工程》2012年第5期910-913,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50671094;50631020);国家重点基础研究计划(2007CB209706)

摘　　要：为了改善LiAlH4和LiNH2的储氢性能,将LiAlH4与LiNH2通过球磨制备成LiAlH4/2LiNH2复合储氢材料体系,采用X射线粉末衍射(XRD)仪、傅里叶红外光谱分析(FTIR)仪、同步热分析(TG/DSC)仪、核磁共振波谱分析(NMR)仪等测试手段研究LiAlH4/2LiNH2复合储氢材料的储氢性能以及放氢过程的结构变化,分析了LiAlH4与LiNH2相互作用的机制。结果表明:LiNH2的加入改变了LiAlH4的放氢反应路径,有效地降低了LiAlH4的分解放氢温度,其放氢过程主要进行两步反应,最终产物为Li3AlN2。In order to improve the hydrgen storage properties of LiAlH4 and LiNH2,LiAlH4/2LiNH2 composite was prepared by ball milling LiAlH4 and LiNH2 with a molar ratio of 1:2,The hydrogen storage properties and the microstructure change during dehydrogenation process were studied by using TG/DSC/MS,XRD,FTIR and NMR.Based on the hydrogen desorption properties and microstructure analysis,the dehydrogenation mechanism of LiAlH4/2LiNH2 composite was discussed.The experimental results show that the dehydrogenation reaction path of LiAlH4 is changed by addition of LiNH2,and the final product is Li3AlN2.

关 键 词：储氢材料 储氢性能 LiAlH4 LiNH2 

分 类 号：O611.3[理学—无机化学]