Li - Al - N - H System Coordination Hydride Hydrogen Storage Performance Research

In recent years, new metal complex hydrides has caused a large number of academic research, because of their extremely high hydrogen storage capacity. Based on the review of the research on the metal complex hydrides and metal-N-H compounds for the hydrogen storage materials were selected as the study object of this work. The Li-Al-N-H system hydrogen storage material was mechanically milled the mixture of LiNH2and LiAlH4.The performance of sample was analysed by XRD, DTA, FIRT, absorption and desorption hydrogen performance test. This experiment mainly discussed the effect of the ball-milling time, catalyst on Li-Al-N-H composite system hydrogen storage material.The research of the LiNH2-LiAlH4composite system showed that the LiNH2/LiAlH4system desorbed7.5wt.%hydrogen after ball milling for4h,and the main generation were Li3AlN2and LiAl4H13. After doped with Ti powder, TiH2, TiF3, CeCl3and V2O5as a catalyst respectively,the results showed that the reaction enthalpy of LiNH2-LiAlH4composite system reduced during the process of temperature,and precipitated the desorption hydrogen reaction. The hydrogen absorbing rate and hydrogen absorbing amount of LiNH2-LiAlH4system for adding TiF3.The exerimental results of LiNH2-2LiAlH4composite system showed that the LiNH2/2LiAlH4system desorbed8.37wt.%hydrogen after ball milling for4h; The exerimental results of2LiNH2-LiAlH4composite system showed that the LiNH2/LiAlH4system desorbed7.0wt.%hydrogen after ball milling for4h.