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.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
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)
