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Ab initio modeling of Li-B-H boron-chain alloys for hydrogen storage applications

A. N. Kolmogorov, R. Drautz, D. G. Pettifor

Physical Review B, 76, 184102,1-5, (2007)

DOI: 10.1103/PhysRevB.76.184102

Download: BibTEX

Ab initio modeling of the Li-B-H system and analysis of the available experimental data on the LixB1-x compound (x ≈ 0.53) have allowed us to identify a potential route for the synthesis of hydrogen-rich LiBH (5.4 wt. %) and LiBH2 (10.2 wt. %) phases. The feasibility of their formation is based on the strength of the boron-boron bonds in the parent material LixB1-x: One could expect its decomposition into lithium hydride and elemental boron upon hydrogenation to be hindered by the high kinetic barriers associated with breaking the boron chains. The proposed phases have heats of reaction of 70-90 kJ/mol H2, higher than the desired values for hydrogen storage applications. We discuss the possibility of improving the energetics of the hydrogen (de)sorption via substitutional doping of LixB1-x.

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{"type":"article", "name":"a.n.kolmogorov200711", "author":"A. N. Kolmogorov and R. Drautz and D. G. Pettifor", "title":"Ab initio modeling of LiBH boronchain alloys for hydrogen storage applications", "journal":"Physical Review B", "volume":"76", "OPTnumber":"18", "OPTmonth":"11", "year":"2007", "OPTpages":"184102,1-5", "OPTnote":"", "OPTkey":"Ab initio calculations; bonds (chemical); boron alloys; decomposition; desorption; heat of reaction; hydrogen storage, lithium alloys", "DOI":"10.1103/PhysRevB.76.184102"}
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