Metal aluminum amides for hydrogen storage – Crystal structure studies

Abstract

Crystal structure of metal aluminum amides has been investigated by synchrotron radiation powder X-ray diffraction (SR-PXD) and powder neutron diffraction (PND).

A new complex alkali metal aluminium amide borohydride, Li2Al(ND2)4BH4: synthesis, thermal analysis and crystal structure

“…Table3summarizes the structural parameters of Li 2 Al(ND 2 ) 4 BH 4 and the structure model is visualized in Fig.7. Al is tetrahedrally coordinated by ND 2 groups and the average Al-N distance is 1.974 Å which is slightly longer than that in LiAl(ND 2 ) 4 (1.868 Å) 12. The average Li-N distance (2.16 Å) of Li 2 Al(ND 2 ) 4 BH 4 is almost the same as that of LiAl(ND 2 ) 4 (2.100 Å).…”

“…12 Mixtures of LiAl(ND 2 ) 4 -LiBH 4 (denoted as S1), NaAl(ND 2 ) 4 -LiBH 4 (S2), NaAl(ND 2 ) 4 -NaBH 4 (S3) and KAl(ND 2 ) 4 -KBH 4 (S4) in 1 : 2 molar ratios were ball-milled for 1 h (15 min milling + 15 min rest, 4 cycles) under 0.1 MPa Ar atmosphere using a Pulverisette 7 (Fritsch). The samples studied in this paper are shown in Table1.…”

Development of Reference Materials for Calibration of the Hydrogen Analyzer at High Concentration

“…Перспективные материалы-аккумуляторы водорода должны иметь оптимальный элементный и фазовый состав, чтобы обладать высокими скоростями сорбции и десорбции водорода, аккумулировать большое количество водорода и быть циклически стабильными [6][7][8][9][10]. Гидриды металлов обладают такими свойствами, как высокая объемная плотность атомов водорода в матрице, широкий диапазон рабочих давлений и температур, каталитическая активность и ряд других, являются наиболее используемыми материалами для хранения водорода [11][12][13][14][15][16][17][18][19]. Интерметаллические соединения на основе гидридообразующих металлов Zr, Ti, Pd, V способны аккумулировать до 4 масс.% водорода [20][21][22][23][24][25][26][27][28][29]?…”

Quantitative and Qualitative Analysis of Hydrogen Accumulation in Hydrogen-Storage Materials Using Hydrogen Extraction in an Inert Atmosphere

“…Additionally, they should accumulate a large amount of hydrogen and be cyclically stable [7][8][9][10][11]. In the matrix, metal hydrides have a high bulk density of hydrogen atoms, a wide range of operating pressures and temperatures, catalytic activity, and are the most used materials for hydrogen storage [12][13][14][15][16][17][18][19][20]. Intermetallic compounds based on hydride-forming metals-such as Zr, Ti, Pd, and V-can accumulate up to four mass % of hydrogen [21][22][23][24][25][26][27][28][29][30] and are widely used for hydrogen storage.…”