Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1625905 | Journal of Alloys and Compounds | 2007 | 8 Pages |
Abstract
When Li,Al is coupled-substituted into the MgH2 structure to assume the composition of LiAlMg10H24, the resulted structure was found to retain that of the parent material but assumes substantial differences in bonding and associated properties. Density functional theory (DFT) method was used in deriving the stable structure, computing the thermochemical parameters and evaluating the reaction/activation energies of dehydriding. The stability of the optimized LiAl-substituted structure was verified through the lattice dynamics calculations of the density functional perturbation theory (DFPT) method. The coupled substitution weakens the H-metal bonds that results in reductions in the reaction energy and potentially the activation barriers of dehydriding of the materials.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Jian-jie Liang,