Abstract
We present a computational screening study of ternary metal borohydrides for reversible hydrogen storage based on density functional theory. We investigate the stability and decomposition of alloys containing 1 alkali metal atom, Li, Na, or K (M1); and 1 alkali, alkaline earth or 3d/4d transition metal atom (M2) plus two to five (BH4) - groups, i.e., M1 M2 (BH4) 2-5, using a number of model structures with trigonal, tetrahedral, octahedral, and free coordination of the metal borohydride complexes. Of the over 700 investigated structures, about 20 were predicted to form potentially stable alloys with promising decomposition energies. The M1 (Al/Mn/Fe) (BH4) 4, (Li/Na) Zn (BH4)3, and (Na/K) (Ni/Co) (BH4) 3 alloys are found to be the most promising, followed by selected M1 (Nb/Rh) (BH4) 4 alloys.
Original language | English |
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Article number | 014101 |
Journal | Journal of Chemical Physics |
Volume | 131 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2009 |
Externally published | Yes |
Funding
The authors acknowledge financial support by the European Commission DG Research (Contract No. SES6-2006-51827/NESSHy), the Nordic Energy Research Council (Contract No. 06-HYDRO-C15) and the Danish Center for Scientific Computing (DCSC) for computer time (Grant No. HDW-1103-06). The Center for Atomic-Scale Materials Design is funded by the Lundbeck Foundation.
Funders | Funder number |
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Danish Center for Scientific Computing | HDW-1103-06 |
European Commission DG Research | SES6-2006-51827/NESSHy |
Nordic Energy Research Council | 06-HYDRO-C15 |
Seventh Framework Programme | 211956 |
Lundbeckfonden |