Thermal decomposition of Mg(AlH4)2 studied by in situ synchrotron X-ray diffraction

Synthesis and hydrogen storage thermodynamics and kinetics of Mg(AlH4)2 submicron rods

“…With increasing temperature to 320 C, the chemical reaction between the newly developed MgH 2 and Al first gives rise to the formation of the AleMg solid solution with hydrogen evolution. Similar phenomenon was also observed by in-situ synchrotron XRD [23]. It is well known that the solid solubility of Mg in the Al phase is only around 10 at.% at 320 C according to the AleMg binary alloy phase diagram [24].…”

The crystal structure of KAlD4

“…Recent work refers to structure, desorption properties and in particular the effect of additives in different alanate-systems including NaAlH 4 [2][3][4][5][6], LiAlH 4 [7][8][9][10][11][12] and Mg(AlH 4 ) 2 [13][14][15][16]. The present contribution describes the crystal structure of KAlH 4 , a candidate material for hydrogen storage with a total hydrogen content of 5.7 wt.%.…”

Investigation of the thermodynamics governing metal hydride synthesis in the molten state process

“…At lower MSP temperatures, Mg(AlH 4 ) 2 is stabilized without decomposition. One should note that these temperatures do not achieve a truly "molten state"; however, the increased thermal energy maximizes diffusion without initiating dehydrogenation of Mg(AlH 4 ) 2 , which occurs at approximately 150 o C [45]. The formation of LiCl thermodynamically drives the metathesis reaction toward formation of the unstable alanate.…”