Sorption Properties Investigation and Diffraction study on novel Li-Al-N-H-Cl systems for Hydrogen Storage Application

E. NAPOLITANO; L. FERNÁNDEZ ALBANESI; F. C. GENNARI; E. SUARD; S. GARRONI; P. MORETO; S. ENZO

Warsaw

Congreso; E-MRS 2017 Fall Meeting; 2017

European Materials Research Society

In the field of hydrogen solid-state storage, alkali amides and alkaline-earth materials show promising hydrogen mass and volume ratios together with remarkable reversibility in terms of hydrogen release and up-take processes [1]. Recently, with the intent to improve sorption characteristics and to modify thermodynamic properties of the well-known LiNH2-LiH system, studies on AlCl3-doped composite describing the formation of new Li-Al-N-H-Cl crystallographic phases were reported in literature [2-3], without their crystal structures being established.In order to investigate the role of AlCl3 in affecting hydrogen absorption-desorption properties, different LiNH2-LiH-xAlCl3 composites were prepared by ball milling and subjected to sorption investigations, thermo gravimetric analyses, TPD-MS measurements and diffraction characterization. Also, one of the unclassified Li-Al-N-H-Cl composite was synthesized from deuterated precursors and neutron plus laboratory X-ray diffraction data were combined with the so called ab-initio numerical methods [4] with the objective to establish the crystal structure and to shed light on hydrogen atoms interaction.