Structural and hydrogen storage capacity evolution of Mg₂FeH₆ hydride synthesized by reactive mechanical alloying^①

来源期刊：中国有色金属学报(英文版)2004年第4期

论文作者：李松林 R. A.Varin

文章页码：649 - 653

Key words：hydrogen storage materials; hydride; fuel cell; mechanical alloying; solid state synthesis

Abstract: Mg-based metal hydrides are promising as hydrogen storage materials for fuel cell application. In this work,Mg₂FeH₆ complex hydride phase was synthesized by controlled reactive ball milling of 2Mg-Fe (atomic ratio) powder mixture in H₂. Mg₂FeH₆is confirmed to be formed via the following three stages: formation of MgH₂via the reaction of Mg with H₂, incubation stage and formation of Mg₂FeH₆by reaction of fully refined MgH₂ and Fe. The incubation stage is characterized by no traces of Mg or hydride crystalline phase by XRD. On the other hand, Mg is observed uniformly distributed in the milled powder by SEM-EDS. Also, almost the same amount of H₂ as the first stage is detected stored in the powders of the second stage by DSC and TGA.