Dicationic bis-coordinated-anion hydride and preparation method thereof

The invention discloses a dicationic bis-coordinated-anion hydride and a preparation method thereof, and belongs to the technical field of hydrogen storage materials. The chemical composition of the hydride is LiMg(BH4)(AlH4)2 or LiMg(BH4)2(AlH4) or a mixture of the LiMg(BH4)(AlH4)2 and the LiMg(BH4)2(AlH4); and the preparation method comprises the following steps: weighing and taking LiBH4, LiAlH4 and MgCl2 powder according to a certain molar ratio, and performing mixing; and performing ball milling treatment on the mixed powder by adopting a planetary ball mill. The dicationic bis-coordinated-anion hydride provided by the invention is a novel coordination hydride, and has low dehydriding temperature and high dehydriding amount; and the preparation method provided by the invention is simple, safe and reliable. 本发明公开了种双阳离子双配位阴离子氢化物及其制备方法，属于储氢材料技术领域。该氢化物的化学组成为LiMg(BH)(AlH)或LiMg(BH)(AlH)或两者的混合物。制备时，按定的摩尔比称取LiBH、LiAlH和MgCl粉末并混合；再采用行星式球磨机对混合粉末进行球磨处理。本发明所提供的双阳离子双配位阴离子氢化物是类新型的配位氢化物，其具有低的放氢温度和高的放氢量；同时本发明所提供的制备方法工艺简单